Beta
×

Welcome to the Slashdot Beta site -- learn more here. Use the link in the footer or click here to return to the Classic version of Slashdot.

Thank you!

Before you choose to head back to the Classic look of the site, we'd appreciate it if you share your thoughts on the Beta; your feedback is what drives our ongoing development.

Beta is different and we value you taking the time to try it out. Please take a look at the changes we've made in Beta and  learn more about it. Thanks for reading, and for making the site better!

Quantum Teleportation Achieved Over 16 km In China

timothy posted more than 4 years ago | from the can-feel-it-from-here dept.

Communications 389

Laxori666 writes "Scientists in China have succeeded in teleporting information between photons farther than ever before. They transported quantum information over a free space distance of 16 km (10 miles), much farther than the few hundred meters previously achieved, which brings us closer to transmitting information over long distances without the need for a traditional signal."

cancel ×

389 comments

Sorry! There are no comments related to the filter you selected.

Philotics (0)

schmidt349 (690948) | more than 4 years ago | (#32308748)

I never got any of this newfangled philotic physics. Half of it nobody understands anyway.

Re:Philotics (1)

Dachannien (617929) | more than 4 years ago | (#32308868)

Aren't they supposed to explain it all on TV Sunday night?

Re:Philotics (4, Funny)

Culture20 (968837) | more than 4 years ago | (#32308912)

I never got any of this newfangled philotic physics. Half of it nobody understands anyway.

No, everyone understands and doesn't understand quantum philotics at the same time, until they are tested. It averages out to half of the population, though.

Re:Philotics (3, Funny)

Anonymous Coward | more than 4 years ago | (#32308920)

Odd, because I tend to feel as if I understand it and don't understand it at the same time.
It's only when somebody asks me if I understand it that I come to a conclusion, either way.

Re:Philotics (4, Funny)

icebike (68054) | more than 4 years ago | (#32309322)

Odd, because I tend to feel as if I understand it and don't understand it at the same time.
It's only when somebody asks me if I understand it that I come to a conclusion, either way.

Me too, but then I get tangled up and with mixed emotions over the recent death of my cat and wish I never tried to understand in the first place.

Re:Philotics (1)

AnotherUsername (966110) | more than 4 years ago | (#32309478)

Really? Because my cat is perfectly fine...Wait...I don't have a cat...

Re:Philotics (3, Funny)

icebike (68054) | more than 4 years ago | (#32309508)

Not anymore you don't.

Re:Philotics (3, Informative)

Anonymous Coward | more than 4 years ago | (#32309142)

That's because in China they just make up results like this to please political bosses.

Wait, does this mean... (2, Funny)

buanzo (542591) | more than 4 years ago | (#32308750)

... I might stop having Cablemodem issues? Sexy!

Re:Wait, does this mean... (1)

buanzo (542591) | more than 4 years ago | (#32308866)

Now, seriously (btw, thanks for the Insightful on the parent comment!)... I see an obvious resemblance to several quite interesting communication systems we see today in sci-fi shows: subspace communiycations, the pearl in V, etc. Could this system transmit data from one point of the universe/galaxy to the other, "instantaneously" ? If so, I'm... flying in my head already.

Re:Wait, does this mean... (0, Flamebait)

Anonymous Coward | more than 4 years ago | (#32308888)

Information can't travel faster than light you moron

Re:Wait, does this mean... (2, Interesting)

buanzo (542591) | more than 4 years ago | (#32308942)

Well, sorry, but with all these quantum shit going on, I'm not quite sure how bendable the universe could be, as to achieve FTL info sending, quantum entaglement or whatever it is they use. i was HOPING you sad, sad, SAD person :P

Re:Wait, does this mean... (1)

Rophuine (946411) | more than 4 years ago | (#32309042)

It's a little more complicated than that.

Re:Wait, does this mean... (1)

Dekker3D (989692) | more than 4 years ago | (#32309138)

it's not travelling, it's in two places at once. no speed involved since it's already there. moron. ;)

Re:Wait, does this mean... (1)

hedwards (940851) | more than 4 years ago | (#32309164)

Not really, all forms of communications we've figured out can't. But it's a bit of a stretch to say that it can't. Whatever you use is only required to be without mass. As in we assume that everything we could use to transmit information would have mass. If it hasn't got mass then it's possible for it to beat the speed of light.

Re:Wait, does this mean... (1)

mcvos (645701) | more than 4 years ago | (#32309232)

Information can't travel faster than light you moron

Then can you please explain what TFA is all about?

Re:Wait, does this mean... (1, Funny)

Anonymous Coward | more than 4 years ago | (#32309436)

Information can't travel faster than light you moron

You'll have to wait a bit for that information to travel to his brain due to the density and distance it must endure ;-)

Re:Wait, does this mean... (2, Informative)

Sir_Lewk (967686) | more than 4 years ago | (#32308924)

No, even quantum entanglement does not transmit information faster than the speed of light.

Re:Wait, does this mean... (1)

buanzo (542591) | more than 4 years ago | (#32308976)

Thanks for the fact. I hope we are wrong, anyway, and they do find a way to do something like that.

Re:Wait, does this mean... (4, Interesting)

Anonymous Coward | more than 4 years ago | (#32309000)

Information has no mass, so why can't it?

Re:Wait, does this mean... (1)

MR.Mic (937158) | more than 4 years ago | (#32309054)

Neither does light. What's your point?

Re:Wait, does this mean... (3, Informative)

ClosedSource (238333) | more than 4 years ago | (#32309152)

Light can travel at the speed of light, things with matter can't.

Re:Wait, does this mean... (0)

buanzo (542591) | more than 4 years ago | (#32309060)

The photons used have mass. Information is just encoding. Of photons.

Re:Wait, does this mean... (5, Informative)

buanzo (542591) | more than 4 years ago | (#32309150)

Actually... http://en.wikipedia.org/wiki/Photons#Experimental_checks_on_photon_mass [wikipedia.org] they're still not sure :P

Re:Wait, does this mean... (1)

the eric conspiracy (20178) | more than 4 years ago | (#32309454)

m1014 eV is close enough for my day to day needs.

Re:Wait, does this mean... (1)

PopeRatzo (965947) | more than 4 years ago | (#32309384)

No, even quantum entanglement does not transmit information faster than the speed of light.

If your statement is true, then I'm back to square one on understanding this "entanglement" thingie. Actually, I never really quite made it to square one, but still...

However, I'm not quite ready to take the word of anyone with a Slashdot UID over 3 digits and without a PhD in Physics. I know I wouldn't take my word for anything, and after a cursory reading of your last 50 comments, I'm comfortable in my assumption that you don't have a PhD in quantum mechanics, though some grad school isn't completely out of the question.

In fact, I'm not even sure I'm willing to take the word of a PhD in physics unless he speaks through some computer-voice box contraption. Which reminds me: why doesn't Stephen Hawking endorse products? He could make a lot of money. Seriously. A Stephen Hawking model programmable calculator? It's be a big hit. However, from what I hear he might run into some of the same problems Tiger Woods did, though maybe not at such a heroic scale. But still, who among us didn't have just a little more respect for Hawking after you found his wife divorced him for having an affair. Hell, you have to be some sort of Einstein to figure out how to cheat on your wife when you can barely move. Anyway, I always had the feeling he was a playa, the way he does that gangster lean in the wheelchair.

Progress.. (0)

Anonymous Coward | more than 4 years ago | (#32308754)

China is leapfrogging the rest of the world.

Say what you will about human rights, but their adaptive central planning strategy is showing results and the average citizen is too busy with getting in on the economic growth to care much about freedoms.

Re:Progress.. (5, Insightful)

Pharmboy (216950) | more than 4 years ago | (#32308782)

And once they get to an economic level that is closer to what the rest of us enjoy in the Western world, they will start caring. When you are hungry, you only want bread. When you are homeless, you only want shelter. When you have plenty to eat and a decent place to live, you want freedom.

Re:Progress.. (-1, Offtopic)

DarkKnightRadick (268025) | more than 4 years ago | (#32308858)

someone mod insightful, please.

Re:Progress.. (1, Redundant)

Third Position (1725934) | more than 4 years ago | (#32308940)

And once they get to an economic level that is closer to what the rest of us enjoy in the Western world, they will start caring. When you are hungry, you only want bread. When you are homeless, you only want shelter. When you have plenty to eat and a decent place to live, you want freedom.

Well, that's always been the assumption, anyway. But apparently things are playing out a little differently in China. [newsweek.com]

Re:Progress.. (1)

Pharmboy (216950) | more than 4 years ago | (#32309002)

Give it time. They are in no way near the level of *average* economic security that we enjoy in the West. They are already getting inflation, which will push up the cost of the goods they produce, but increase the average salary. They are going very far, very fast, but they still have a ways to catch up with the US and Europe in the way of average income.

Re:Progress.. (2, Insightful)

gsgriffin (1195771) | more than 4 years ago | (#32309228)

and when you finally have freedom, you then want the government to do everything for you and regulate everything that is not perfect in hopes that the government will make it perfect...then you lose your freedom again.

Obligatory (2, Funny)

Thoggins (1162149) | more than 4 years ago | (#32308760)

Re:Obligatory (0, Flamebait)

pandrijeczko (588093) | more than 4 years ago | (#32308814)

Someone should tell those xkcd guys to take a bit more care before posting their cartoons - they seem to keep missing out the final frame which is the one that would normally contain the final punchline thus causing the reader to find it funny.

Re:Obligatory (5, Insightful)

jo_ham (604554) | more than 4 years ago | (#32308854)

Dare I say, if you don't find xkcd funny, the material might be somewhat... not aimed at you.

To be delicate.

Especially if you don't find *any* of them funny (although not all of them are designed to be humourous).

Re:Obligatory (1, Troll)

AnonymousClown (1788472) | more than 4 years ago | (#32309180)

Dare I say, if you don't find xkcd funny, the material might be somewhat... not aimed at you.

To be delicate.

Especially if you don't find *any* of them funny (although not all of them are designed to be humourous).

Wooo! Howdy!

I ain't find'n any'um funny meself!

Where's the farting?! Or the stick guy hitting the other stick guy in the balls - you know Ouch! My balls! That's funny!

I think uze guys are just too stick in the muds!

Oh! Gotta go! One of them thar chopper shows is on TV and then there's the bounty hunter go'in after some dirtbags. Then later it's the Ice Cream Truckers driven on ice roads. It's all sciencie stuff 'cause it's on Discovery and that history channel - sos'it's educational!

Re:Obligatory (0)

Anonymous Coward | more than 4 years ago | (#32308906)

Have you considered the option of getting the joke? If not, try it now and redeem your soul.

Of course, you could go with an alternate punchline: http://goatkcd.com/465/ [goatkcd.com]

Re:Obligatory (1)

glavenoid (636808) | more than 4 years ago | (#32309294)

Bloody hell, I knew it but still fell for it anyway.

Re:Obligatory (0, Troll)

Sir_Lewk (967686) | more than 4 years ago | (#32308956)

Fixed. [goatkcd.com]

Re:Obligatory (-1, Offtopic)

Anonymous Coward | more than 4 years ago | (#32309044)

I sat naked on the bench in the health club locker room, staring at the tiles on the floor between my feet, but really looking at nothing. I was waiting for Barack to decide to come up and talk to me. He was this muscular teenage nigger who frequented the club and had ruined my life in the last few weeks. I was ordered to sit naked on the bench without a towel or anything to cover my nakedness. I had to keep my legs spread and my cock and balls visible for the anyone in the locker room who wanted a look. I knew instantly that it had been a mistake to sign up at the inner city health club which was eighty percent black, but it was near my house and cheap which was even more important.

The harassment had started on my first visit. Dark skinned, muscular black boys bouncing around the locker room with their huge dicks and pendulous sacks of balls swinging, high fiving each other and laughing and rapping, and there I was, this moderately built white guy of thirty two.

I will never forget coming back from the shower and one chocolate skinned thug of about eighteen let out a "weeeeeeeow" kind of sound and then said very loudly to me, loudly enough for all his pals to hear, "White man, how the hell can you fuck wit such a small dick?" They all roared with laughter and I turned bright red. Before I left that first time, I met Barack. He eased up to me while I was packing my gym bag. He is one good looking darkie, I will say that for him. He flashed me a big white toothed smile and said he hoped I wasn't thinking of quitting the club. He said he was friends with the manager and they had my address and shit, and it would be really unfortunate if I decided to quit. Then he laid one large basketball player sized hand on my shoulder and said that he would see me at the same time the next day.

Well, that's how it started. It got worse each time I went to the club. Barack and the other niggers got me to get towels for them, had me scrub their backs in the shower, even made me pick their dirty stinking jock straps up off the floor. They sent their filthy jocks and socks home with me to wash for them.

Now let me state here once and for all, that I am in no way at all gay. I don't think I ever even had a gay thought. So all of this really repulsed me. They would brush up against me so their big fat black dicks rubbed my body. They would make constant jokes about me being a faggot.

So I had it out with Barack. I told him I was a single parent with a thirteen year old daughter and in no way gay, and I wanted to quit the club. That mention of my daughter was the biggest mistake of my life. Barack demanded to see a photo of her. Her name is Crissy. After that, all they talked about was "Crissy the Cunt" in the locker room.

"Some fourteen year old school boy probably shoving his dick in her right now while you is at da club." They would say things like that. Barack would ask, "Do you suppose she had ever sucked black dick?" I told them she was totally innocent, and they should keep their foul mouths to themselves. They beat the shit out of me.

I didn't go to the club for a week. All the windows were broken on my car, and my newspaper was stolen, and somebody pissed all over our door. I received a package at work, and when I opened it, there was a pile of shit in a box. I was going nuts with anguish. I thought of going to the police, but I knew I would face even worse if I did. So I went back to the club. That was two months ago. A lot had happened in those two months.

Now I sat waiting for Barack to speak with me. He walked up, stark naked. The first thing I saw were his huge brown feet next to me. I looked up at his long muscular legs. How could I miss the seven inch flaccid dick, thick as a flashlight and the ball sack that looked like it had oranges in it. It was fucking obscene. His stomach was hard and tight. His ass was one of those round tight nigger bubble butts. His chest well defined with large nipples. He had a killer smile, thick nigger lips, and dark flashing eyes that often looked drugged. He had only recently gotten out of reform school for molesting a girl on the playground.

"So, my man, how's that little dick of yours hangin'?"

I spread my legs wider so he could see my pathetic shriveled white prick and small ball sack. If I didn't keep myself on display for them at all times, they would have a wet towel snapping session where my scrotum was the target. It hurt like hell and was totally humiliating.

"So, bro, is everything set up for tomorrow?" He stood close to me...so close that his huge flaccid hunk of fuck meat brushed my shoulder. His dick was so huge, it was just fucking obscene, and that was in its flaccid state. He had not showered yet, and his body reeked of the nigger stink of his workout.

"Please. Please don't do this. I know I agreed, but that was after you had beaten me almost senseless. Please, isn't there some other way?"

He lifted one leg and put his foot on the bench next to me. His gigantic balls swung back and forth in their fleshy sack.

"Dere is no other fucking way, man. You don't wanna even think of what we gonna do to you next time you disobeys us. Dere is no other way. Now it so happens dat I needs me a new girlfriend, and your pretty little daughter fills da bill."

I felt my stomach turn over. I tried to relax, to breath deeply, but I felt like I was choking. This teenage nigger thug was talking about my daughter. My little Crissy. My thirteen year old angel. He had announced to me that he wanted her to become his girlfriend! Jesus Christ!

At first I had bluntly refused, letting my anger and disgust show. All the niggers in the club gathered around me, about fifteen of them, and Barack announced that I was racially prejudiced and didn't want him dating his white daughter. They started to slap and punch me.

"It's not that. Honest to God, I swear, it's not that you are black. It's that she is only thirteen. She's my innocent baby!"

Barack roared with laughter. "Any bitch of thirteen is totally ready for dick! She probably sucking da boys at school every day anyway by now." He looked at the photo of her which he had taken from me. "Yeah, she got real cocksucker lips, she shore do!"

"Oh God no, she's just a baby." I was crying in front of all of them.

"No, daddy, you gots it wrong. She is a babe...not a baby. Dat pretty little pussy is ready for some nigger popping!" Half the niggers surrounding me were getting hard ons, and I don't there there was one under eight and a half inches.

For weeks I had argued, begged, pleaded, tried to bargain with Barack, but he only wanted one thing. My daughter's virgin pussy. Once I stood up to them and told them I would go to the police. They had dragged me naked and screaming into the health club bathroom and forced me to eat turds out of the toilet bowl. I was sick for two days. The next time I went to the club, Barack had made me suck his dick. That was the first time I saw it erect. Over twelve inches of throbbing leaking nigger cock. I had a panic attack and literally tried to run out of the club. They held me down on a bench and Barack fed me his black fuck meat. His balls almost suffocated me. His dick choked me. He even made me suck his ass. What could I do? I agreed to let them have my daughter. I know, I am an awful man. A sinner. It is unforgivable, but I am scared out of my wits.

"So, tomorrow, I comes over to yo house dressed up real good. You introduce me to yo bitch daughter. Now when I sees her, dis is how I wants her dressed. A very tight tee shirt dat says printed on it, "I Love Nigga Dick!" She will wear no bra under it so I can see the tips of her budding little titties through the material. Den she is to wear her nice pleated cheer leader skirt like in da photo, only I don want her to wear no panties under it. From now on, yo daughter is forbidden to ever wear any panties. We want dat fresh young cunt and ass ready and available at all times. I want you to have some really top drawer booze at yo house ready for me. I am not sure what I will want, so you better have enough to satisfy me, whatever my taste might be. Who da fuck knows, I may want a cosmo, or maybe some of dat Louis XIII Brandy dat costs three hundred dollars. You better have it all. After I has a drink, you pretty little bitch and I gonna sit on da couch and get acquainted. Dat means you as da daddy get to watch me finger her cunt and play wit her titties. You gets to see her meet my big fat old dick and even lick and suck it a little. I always insists on sex on da first date, cause how else you know how a bitch perform, right? Shit, I insist on sex on every date. I mean dat is da only reason for da fucking date..to plow some pussy! Right? Otherwise I'd rather hang wit da home boys. Now she gonna be a little uptight and scared at firs...right? Specially when she see my dick and she know dat huge motherfucker is gonna plow her virgin twat! Oh yea, if she got any hair on her cunt yet, you make sure she shave it all off before tomorrow. I wanna see bald thirteen year old pussy."

While he said all of this to me at the health club, his dick got thicker and thicker and long strings of pre-fuck started to hang from the fat pisshole.

"Please don't hurt her...please." I was shaking in my naked agony.

"Hurt her? No why the fuck would I hurt my new girlfriend? I gonna love her. I gonna show her da pleasures of lovemaking. Shore, it gonna hurt a little da first time I ram my twelve and a half inch motherfucking dick balls deep into her tight little teenage pussy. Shore it gonna hurt when I pounds her as hard as I can, and den pull out and shove it as hard as I can up her little asshole. Shore dat gonna hurt a little, but dat is jus' part of growin' up. A her daddy, you understand dat. Right? Better to hab some nice boy like me who wants her for his girlfriend fucking her, den every boy at school who don't give a shit about her.

"Now don't you worry, I gonna take her into the bedroom to fuck her cunt and ass. I think dat is private. I mean, you can watch da first time she suck my balls and lick my dick and such. But fucking is between a guy and his girlfriend. I wants you dere at the start...at the sucking part, cause she is gonna be scared like I say, and you can calm her. Tell her it is a natural part of life, and she just gotta learn to please a man. She, she shoulda learned dat couple of years ago already. She is a late bloomer.

Now I am gonna want to use her bedroom for da first fuck,cause I wants to fuck her little bitch body in her teenage bed, wit all her teenage shit around. It will be so hot. But den, I is moving into your master bedroom. You can sleep on da couch. I wants a nice big bed and luxury for future fucks. I gotta fuck at least three times a day, usually more. Now of course I still going to be bangin' other cunt, but I will fuck your daughter regularly cause she is my number one girlfriend. My special bitch. I ain't gonna introduce her to my bros until after I fuck her for a week or so. Den when she broken in, I gonna share her with all da boys from dis here health club. Dere about twenty of us here as you know, so she gonna be pretty busy sucking nigga dick and getting ass and cunt fucked. We gonna do mos' of it over at yo house. You have lots of food dere at all times fo my brothers when dey comes over to fuck your daughter. Since she be fucking most every day all day and night from now on, I suggest you apply to home school her. Dat way, she don't even need to think about school and she can concentrate on nigga cock all da time."

"Please, please use condoms...." I had tears running down my face.

Barack roared with laughter. "Condoms? Shit...no. We never use condoms. It ruins da fuck. Dat little bitch gonna be pregnant in a couple of weeks at mos'. You gonna be da grand daddy of a nigga chile! And who knows. She young. If she stay tight enough and cute enough, maybe we fuck her for three or four years, you know, pass her around, pimp her out. Shit, she still young enough. She could hab five or six nigga babies! We don' allow no abortions. She gonna breed. Now my brothers and daddy be comin' over lots to fuck her too, so you better have lots of keys to yo house made, or jus' leave the fucking place unlocked. She don't leave da house without permission. I would hate it for both of you if some black bro comes over for a good hard fuck, and she not dere! Now I know you worried about her. Don' be. After a few days of getting nigga dick, she gonna love it so much, dat all she gonna live for. I seen it in young white bitches lots of times. Someday she gonna thank you for all dis. I mean how many girls her age so lucky to get ten to fifteen black cocks a day? Long as her pussy and asshole hold up, she be happy. One thing, she gonna hab to be a really good cocksucker, cause One thig is dat when da boys in my hood meet up wit guys from other gangs...we got dis thing. We hab our girlfriends suck da cocks of all da members of the other gangs, as kind of a peace signal, you know, a sign dat we is kewl and everything is okay. So she gonna pretty much hab a dick in her mouth twenty-four seven for da next few months. She gonna be sucking on nigga dick even when she getting fucked by my bros. Dis house gonna be pretty packed full of black boys! Now, after a bitch has sucked fifteen to twenty dicks a day, she often get a real tired jaw and swollen lips and a sore tongue, so you gonna have to tell her no matter how tired she get, da last dick of da day she suck, gets jus' as good a suck as da first one in da morning. You gotta make sue she understand that. I can't have no bad reports from rival gangs dat my bitch can't suck!

Now we gots one more problem. Da little bitch gonna be so busy getting fucked and sucking dick, she ain't gonna hab no proper time to clean up da dicks after dey fuck her cunt and ass! You know it da bitch's job to clean a dick wit her mouth after a brother fuck her. I mean, you can't expect a brother to walk around wit pussy slime or ass juice on his dick. But she gonna be so busy, she ain't always gonna hab time to clean up, so you my friend is going to have to step up to da plate to help her. You gonna be the official dick cleaner. You gonna lick and suck da dicks clean after dey fuck yo bitch of a daughter. I want you naked on you hands and knees at all times around da house, ready to lick and suck dick clean. And you gonna do a fine job too, I just know it. You get all dat stink off da cock. Maybe you can entertain da brothers waiting next in line to fuck yo daughter too by lickig dere balls and assholes. I never thought of dat until just now. Hot damn, dat is a good idea, ain't it? So dey don't get bored while dey waitin. And den, to keep your daughter fresh and tight, after every three or four fucks, you gonna crawl in and suck the nigga cum right outta her pussy and asshole. Think how great dat is. You gonna get to suck some thirteen year old pussy and asshole! How lucky is dat? You gonna clean out her cunt real good with yo tongue so it is ready for da next nigga.

We gonna be da happiest family you ever seen! Now come on, white boy, suck my dick, can't you see it dripping all over da floor?"

I put my mouth over the head of the huge leaking hunk of fuckmeat, and resigned myself and my daughter to our new destiny.

Re:Obligatory (0)

Anonymous Coward | more than 4 years ago | (#32309082)

"Someone should tell those xkcd guys to take a bit more care before posting their cartoons - they seem to keep missing out the final frame which is the one that would normally contain the final punchline thus causing the reader to find it funny."

Stupid. Did you even RTFC? May be that people often post far-fetched associations to xkcd, but in this case the comic was not only on-topic and funny but informative too.

Re:Obligatory (0)

Anonymous Coward | more than 4 years ago | (#32309340)

Sorry, but xkcd is a case of "The Emperor's New Clothes" - everyone's afraid to say what they really think about it in case they appear uncool or lacking in street cred.

Re:Obligatory (0)

Anonymous Coward | more than 4 years ago | (#32309442)

Alt tags. Look 'em up. Or, just hover your mouse over the xkcd comic. Wednesday's IPV4 joke made me actually laugh out loud.

Sorry that you're too stupid to get the jokes.

Yea but. (4, Funny)

Pharmboy (216950) | more than 4 years ago | (#32308766)

Unfortunately, what they transmitted was an email for Vi4gra, using an open wifi connection at a Starbucks 10 miles down the road.

Lightspeed limited, not an ansible (5, Insightful)

Anonymous Coward | more than 4 years ago | (#32308770)

Before you think this is awesome, this is not an ansible, information is transmitted at lightspeed only.

Re:Lightspeed limited, not an ansible (0)

Anonymous Coward | more than 4 years ago | (#32308852)

Why? Is it using any kind of particles or waves to send the info?

Re:Lightspeed limited, not an ansible (0)

Anonymous Coward | more than 4 years ago | (#32308870)

Yes -- namely, a photon.

--not the same AC as OP

Re:Lightspeed limited, not an ansible (1)

tenco (773732) | more than 4 years ago | (#32309224)

Yes.

Re:Lightspeed limited, not an ansible (2, Informative)

DarkKnightRadick (268025) | more than 4 years ago | (#32308880)

ansible [wikipedia.org]

Next time, define the terms yourself, you insensitive clod.

Re:Lightspeed limited, not an ansible (0)

Anonymous Coward | more than 4 years ago | (#32308934)

My understanding is quantum entanglement is faster than the speed of light. Einstein called it "spooky action at a distance."

Re:Lightspeed limited, not an ansible (0)

Anonymous Coward | more than 4 years ago | (#32309106)

Your understanding...is flawed. OOOO YEAHHHHHHHHHHHHH

Re:Lightspeed limited, not an ansible (3, Interesting)

Quantumstate (1295210) | more than 4 years ago | (#32309146)

It happens faster than the speed of light, but it isn't any use without extra information which can only be sent at light speed. You could use it to send secret messages since the state is instantly transferred and cannot be intercepted on the way and then the extra information can be used to get the data.

What is the nature of the extra information? (1)

NNKK (218503) | more than 4 years ago | (#32309244)

Is it possible to generate the needed information in advance?

Re:Lightspeed limited, not an ansible (1)

Joce640k (829181) | more than 4 years ago | (#32309260)

Yes...but you can't use it to transmit any information.

Re:Lightspeed limited, not an ansible (1, Interesting)

Anonymous Coward | more than 4 years ago | (#32309238)

Yes, information can only be transmitted at light speed. (Except information pertaining to gravitational fields, which must be transmitted instantly over vast distances in order for planets and moons to stay within stable orbits. Run the numbers for yourself -- see if you can get the planets to stay in orbit when the force points towards where the *current* light-speed gravitational waves say the massive object is.)

star trek (1)

wodkamichi (1545967) | more than 4 years ago | (#32308800)

why does it take that long to get it working ? didn't take scotty that long to figure it out ;)

Re:star trek (1)

nacturation (646836) | more than 4 years ago | (#32308922)

why does it take that long to get it working ? didn't take scotty that long to figure it out ;)

They insisted it be housed in a transparent aluminum case.

"Scientists write fake paper for money + prestige" (1, Interesting)

Anonymous Coward | more than 4 years ago | (#32308808)

Chinese scientists merely wrote another fake paper, as is the common practice in Chinese academia:

http://www.chinadaily.com.cn/english/doc/2006-03/15/content_536821.htm
http://www.china.org.cn/china/life/2009-02/04/content_17222202.htm
http://search.yahoo.com/search;_ylt=A0oGkm5hk_VLFq4AU84qk6B4?p=as+china+academic+cheating&fr2=sb-top&fr=404_news&sao=0

Re:"Scientists write fake paper for money + presti (0, Offtopic)

benjfowler (239527) | more than 4 years ago | (#32308994)

Happens all the time. Mainland Chinese have a huge thing about "face" and prestige, but evidently, it doesn't extend to not lying and stealing compuslively to make yourself look better. Their little brains don't understand that you lose a LOT of face when everyone sees you as a liar and thief.

China has scientists? (-1, Troll)

Anonymous Coward | more than 4 years ago | (#32308820)

China has scientists? And here I thought they stole/copied anything novel from the West and rarely have an original idea of their own.

Re:China has scientists? (1)

Pharmboy (216950) | more than 4 years ago | (#32308838)

They stole the idea from Star Trek.

Re:China has scientists? (1)

thoughtsatthemoment (1687848) | more than 4 years ago | (#32309462)

And the ideas of Star Trek is to move earth civilizations, including China, to other planets.

NOT over a free space (2, Funny)

Anonymous Coward | more than 4 years ago | (#32308822)

Not until they do it over the USA or even France, but not over China.

This would be interesting for production use... (0)

mlts (1038732) | more than 4 years ago | (#32308830)

10km is a good distance. However, if one could be able to both do quantum information across longer distances, and with a decent bandwidth, this would change communications as we know it just like fiber optic cables. Some examples:

Mars rovers could be controlled in real time -- no 4 hour lag time.
Astronomy experiments could be done by sending instruments out and being able to observe items with a large virtual radio array in real time.
Internet routing would be revolutionized -- it only would be the router's CPU speed that would be the latency limit, not distance.

With real time control of robotics even if they are on another planet, this would allow us to mine, but yet have a human operator on duty that can respond quickly if something happens in the cave -- no need to trust an AI 100% of the time.

Re:This would be interesting for production use... (1)

slick7 (1703596) | more than 4 years ago | (#32308882)

This is only a precursor of a secure line of communication, that cannot be tapped, triangulated, or intercepted. Don't worry, the NSA already has it.

Re:This would be interesting for production use... (1)

DarkKnightRadick (268025) | more than 4 years ago | (#32308892)

still have to deal with the speed of light.

Re:This would be interesting for production use... (4, Interesting)

GoblinSoul (1456863) | more than 4 years ago | (#32308958)

I believe Quantum entanglement is actually a minimum of 10'000 times the speed of light. http://en.wikipedia.org/wiki/Quantum_entanglement#Experiment_measures_.22speed.22_of_the_quantum_non-local_connection [wikipedia.org]

Re:This would be interesting for production use... (1)

DarkKnightRadick (268025) | more than 4 years ago | (#32309392)

Now that is interesting.

Re:This would be interesting for production use... (0)

Anonymous Coward | more than 4 years ago | (#32309458)

I believe Quantum entanglement is actually a minimum of 10'000 times the speed of light.

http://en.wikipedia.org/wiki/Quantum_entanglement#Experiment_measures_.22speed.22_of_the_quantum_non-local_connection [wikipedia.org]

For those who are curious, this is the article [nature.com] referenced by Wikipedia.

Re:This would be interesting for production use... (0)

Anonymous Coward | more than 4 years ago | (#32309008)

It's not clear. The changes do actually happen instantaneously, not limited by the speed of light, but there's skepticism about whether useful information could be transmitted this way.

Re:This would be interesting for production use... (1)

DarkKnightRadick (268025) | more than 4 years ago | (#32309370)

Hrm.

Re:This would be interesting for production use... (0)

Anonymous Coward | more than 4 years ago | (#32308900)

Theoretically (though nobody seems to quite understand the theory), the distance isn't limited.

The applications in space exploration are probably the most realistic in the next few decades. But if it ever gets cheap enough, imagine zero-latency internet connections in every mobile device. Cell towers would be obsolete.

Re:This would be interesting for production use... (0)

Anonymous Coward | more than 4 years ago | (#32308952)

No, sorry, relativity theory still holds. No information transport faster than the speed of light in vacuum. Go visit the all-knowing, all-seeing Trash Heap. [wikipedia.org]

Re:This would be interesting for production use... (1)

paxcoder (1222556) | more than 4 years ago | (#32308982)

Eliminating ISPs would make for truly free Internet (se PirateBay case) - and the rest of communications. No more disconnecting, no more dependance, no more monopoly of the telephony providers. It would also hopefully make it safer privacy-wise.
Not to mention all the money saved on cables ;-)

Info can't propagate faster than speed of light. (4, Informative)

Cordath (581672) | more than 4 years ago | (#32309062)

Don't feel bad, this is a pretty common mistake. People read about non-locality and how what happens to one half of an entangled pair affects the other half instantly no matter how far away it is. There does remain some philosophical debate over what entanglement and non-locality really are, but one thing has been supported very well by both theory and experiment: You can't transmit information or power faster than c. In the case of entangled pairs, actions on one half can have a non-local effect that propagates faster than c, but it's not possible to transmit information or power using that effect. In order to make sense of the results and actually observe the effects of non-locality, you typically need to send additional information classically.

So, this will not lead to lag-less communication over vast distances. What it will lead to is quantum crypto networks. Long distance entanglement swapping or quantum teleportation are one of the key ingredients to building a scalable network.

I don't get it (4, Insightful)

Adrian Lopez (2615) | more than 4 years ago | (#32308850)

Isn't it impossible to transmit information via quantum entanglement? Since you cannot determine the state of an entangled particle, you cannot use it to "transmit" information until after you let the other end know, through conventional channels, what each possible state actually stands for. If that's the case, how exactly is this "quantum information transfer" supposed to work.

Re:I don't get it (1)

TranceThrust (1391831) | more than 4 years ago | (#32309010)

My thoughts exactly. I skimmed through the article but didn't find a clear answer (also, the formulas in there just seem to pop up from nowhere, but I'm no physicist and hope the guys from nature do get it...)

Re:I don't get it (1)

pwilli (1102893) | more than 4 years ago | (#32309012)

You are right. What TFA probably means is that Alice doesn't have to send Bob a traditional signal, because Charlie (the guy that creates the entanglement and distributes the 2 photons to Alice and Bob) does that classical comunication for them.

Re:I don't get it (4, Informative)

pwilli (1102893) | more than 4 years ago | (#32309092)

To further clarify what I meant:

- Charlie entangles Particles A+B
- Charlie sends Alice Particle A over fiber
- Charlie sends Bob Particle B over air
- Alice measures A and sends Charlie information about measurement (classic part needed for actual information transfer)
- Charlie sends classic information to Bob
- Bob measures Particle B, combines result with classic information, and voila, Bob can reconstruct the information "sent" by Alice


Clearly no way to transfer information securely or fast, but a proof that entanglement in Particle B for Bob can survive long transfer through air.

Re:I don't get it (1, Informative)

Anonymous Coward | more than 4 years ago | (#32309018)

Yes, whoever wrote the summary has no idea what s/he is talking about. Entanglement transmitted information would violate relativity, since you could send a signal that effectively traveled faster than the speed of light.

How does time work here? (1)

wytcld (179112) | more than 4 years ago | (#32309028)

Sure you can determine the state of a particle. You can do something that will change its state in a predictable way. Then the other particle, which you haven't changed, changes at the same time.

Which brings us to the question of Relativity: Since there is no such thing as simultaneous time in the universe, per Einstein - that is, what's simultaneous from one perspective is sequential from another - when does the untouched-but-entangled particle change state to match the one we've acted on in a determinative way?

Re:How does time work here? (1)

maxume (22995) | more than 4 years ago | (#32309126)

The whole perspective and simultaneity thing really sucks for photons.

Re:How does time work here? (0)

Anonymous Coward | more than 4 years ago | (#32309420)

My guess is that the entangled particle doesn't decide what state it is in until someone looks at it :)

Re:I don't get it (2, Informative)

ianezz (31449) | more than 4 years ago | (#32309168)

Since you cannot determine the state of an entangled particle, you cannot use it to "transmit" information until after you let the other end know, through conventional channels, what each possible state actually stands for

As far as I know (very little, please correct me if I'm wrong), you can't neither predict nor influence the outcome of measurements, but you can be sure they will be the same at both ends, unless someone is eavesdropping in the middle. The flow of measures can then be used as a one time pad to encrypt something at one end, transmit it over a conventional channel, and decrypt it at the other end.

Re:I don't get it (0)

Anonymous Coward | more than 4 years ago | (#32309214)

It's possible since we can measure the results of the interaction of light, we can use that to define states. This, of course, would require us to be able interact with the particle enough to where the state will eventually turn back into a previous known state in a predictable way. This is most likely possible though probably extremely difficult depending on how many possible states there could be.

Say there the initial unknown state.

You try to get the results and you get state A from the results.
You repeat and get state B.
You repeat and get state C. ....
You repeat and get state Z.
You repeat and get state A.

If you can manage to find a serial relationship between states with the interaction of light, you can figure out it's original state. This of course, assume we are able to get a particle itno one of the known states (which may involve randomly looking at it changes into a state we can use). This would allow you can continously send data through quantum mechanics. We can also probably figure it out with other types of relationships if serial is not possible but the proccess would be much more complex and difficult.

Just because we don't know it's original state doesn't mean it's useless to us as the interaction will give us a point of reference to infer a value.

Re:I don't get it (1, Interesting)

Anonymous Coward | more than 4 years ago | (#32309288)

If that last quantum mechanics class I took was any indicator, then yes, it's impossible. The problem with transmitting information via entangled particles is that you can't know the state of the particle before measuring it, but measuring it breaks entanglement. So you can "transmit information" all day via entangled particles, but you still have to go the slow way if you want to find out the heck the message meant.

Peer Reviewed (5, Insightful)

areusche (1297613) | more than 4 years ago | (#32308874)

http://science.slashdot.org/story/10/04/19/0132246/Chinas-Research-Ambitions-Hurt-By-Faked-Results

This story alone makes me skeptical about any major scientific breakthroughs until someone can peer review the results.

Congrats to the hardworking people on the project, however I will be applauding their work with less skepticism when I hear that MIT, Cornell, CMU, etc confirm the results.

Re:Peer Reviewed (2, Informative)

parallel_prankster (1455313) | more than 4 years ago | (#32309390)

My thoughts were exactly that when I read this. But this is published in Nature photonics, it cannot be all fake. There is a possibility of incorrect experiments/conclusion, but it cannot be complete BS.

What, no tradtional signal? (1)

pz (113803) | more than 4 years ago | (#32308896)

In what way are photons travelling down a fiber not a traditional signal? Sure, they are entangled, but you still have to ship photons around.

We are talking quantum here ... (0)

Anonymous Coward | more than 4 years ago | (#32308902)

The message "Hello kitty" oddly enough was received as "Kitty Alive/Kitty Dead".

I can see it now (1, Funny)

masterwit (1800118) | more than 4 years ago | (#32308910)

Monster Cable will find someway to exploit this, of course with enough shielding to protect against a nuclear blast and the heat of the sun.

Contradictory (2, Informative)

pwilli (1102893) | more than 4 years ago | (#32308946)

Why is TFA contradicting itself? A traditional signal is always needed, that's one fundamental principle of quantum comunication.

Please mod parent up (1)

wurp (51446) | more than 4 years ago | (#32309034)

You still need a classical signal. Information still cannot be transmitted faster than light.

It's possible there are esoteric uses for this if it could be scaled up dramatically in terms of the sophistication of the state transmitted, and this could matter for quantum computer communication some day, but I fail to see any real use for quantum teleportation today.

I do have a BS in Physics, but that was 15 years ago and I have never done physics professionally - I got sucked up by the nice pay and abundant job market for programmers.

Re:Contradictory (1)

Klinky (636952) | more than 4 years ago | (#32309064)

Unfortunately the article was quantum encoded, reading a sentence changes it's statement.

Re:Contradictory (1)

Sabalon (1684) | more than 4 years ago | (#32309266)

Way I read it is that you need a traditional channel to get one of the photons to the other location. Once you've done that, change made at the first location are realized at the second station without the traditional channel.

ie. You want to hear me a mile down the road, so you ride down the road with a walkie-talkie. Once you get there, we are able to communicate without a new radio being sent to you every time.

Re:Contradictory (2, Informative)

Athanasius (306480) | more than 4 years ago | (#32309344)

Except each entangled pair is one-use only. You measure the state of one half of it, which instantly sets the same state in the other pair, and then they're no longer entangled (due to you having observed).

Also you can't predict or set the state of half an entangled pair, only measure it, causing the waveform to randomly collapse. The only thing this gets you is secure transmission of a random sequence (many entangled pairs) of states, which you can then use as a one-time pad/key for conventional encryption over a conventional link. If anyone tried to eavesdrop in the middle they interfere in a measurable manner.

Have they now... (2, Informative)

QuasiRob (134012) | more than 4 years ago | (#32309112)

"Scientists in China".

Think I'll be waiting for independent verification of this one then...

In a few years... (1)

durrr (1316311) | more than 4 years ago | (#32309398)

QbitTorrent is going to give a few industries some serious headaches, good luck tracking and snooping on free space quantum teleportation.

Knowing the legendary plagiarism in China... (-1, Troll)

sethstorm (512897) | more than 4 years ago | (#32309428)

...I'll call bullshit. When such deeds are performed in the US - then I'll believe it.

I guess this means I get a ton of Chinese apologists to modbomb me.

Of course, if I were in China, my organs would be gone by the end of the day.

Load More Comments
Slashdot Login

Need an Account?

Forgot your password?