Teleportation goes long distance

[Guest]

Researchers in China have achieved quantum teleportation in free space over a distance of 16 km

Quantum communication promises the world a completely secure way of transferring information, and quantum teleportation is an information transfer protocol that will one day make quantum communication over long distance possible. Previous studies have demonstrated quantum teleportation using an optical fibre, but photon losses due to decoherence in the fibre are large and the transmission distance is limited to 600 metres. Jianwei Pan at the University of Science and Technology of China in Hefei, Chengzhi Peng at Tsinghua University in Beijing and co-workers1 have now achieved quantum teleportation in an optical free-space channel over a distance of 16 kilometres.

The researchers generated an entangled photon pair at Badaling in Beijing using a semiconductor, a blue laser beam and a beta-barium borate crystal. They sent one photon in the pair to 'Alice', situated at Badaling, for measurement. They then sent the other photon in the pair and the results of Alice's measurement to 'Bob' at Huailai in Hebei province — 16 kilometres away — through the free-space channel.

The researchers used specially designed telescopes to optimize the transmission efficiency and improve the stability of the free-space channel. They found that Bob could recover the results of Alice's measurements using the photon it received, thus demonstrating quantum teleportation. The study confirms the feasibility of quantum teleportation in free space and represents an important step towards quantum communication on a global scale.

Quantum physics:Teleportation goes long distance : Article : Nature China

 

[Guest]

can i witness the day when objects (like human) could be disassembled, teleported and then reassembled on the moon.

 

[xuxu1457]

May be I can move one place to another in 1 second~~~

 

[gubbi]

can i witness the day when objects (like human) could be disassembled, teleported and then reassembled on the moon.

Didnt they routinely do that in the Star-Trek Universe?
And thats the only Sci-fi series in which teleportation has been shown. Star-Wars doesnt have one, and neither do any other sci-fi Space Adventure series!

 

[gubbi]

May be I can move one place to another in 1 second~~~

I do that all the time. I teleport myself by mind control. However at present the technology is at a very primitive stage and the longest distance I have managed to teleport myself is from my chair to the edge of the study table and back to grab a coke can!

 

[genetic_nomad]

no need to poke fun dude, it seems the technology is related to telecommunication (teleportation may be a typo). good for the engineers involved, hopefully they can mature this technology and finally the world can shut up about chinese unable to innovate.
good luck to you guys

 

[xuxu1457]

New communication through entangled photons~~

 

[Guest]

no need to poke fun dude, it seems the technology is related to telecommunication (teleportation may be a typo). good for the engineers involved, hopefully they can mature this technology and finally the world can shut up about chinese unable to innovate.
good luck to you guys

yes, i know its about communication, but theoretically, everything is quantum message. we are making progress in teleporting now, who knows when would we mastered the assembling and disassembling technique.