China Quantum Communiations Technology: Cryptography, Radar, Satellite, Teleportation, Network

[DoTell]

For your knowledgeable physicists out there, is this "quantum non-locality" theory about the exact same event can happen at different locations simultaneously? If so it will be really cool that such phenomenon can be generated in a controlled environment

 

[XenoEnsi-14]

quantum non-locality, which Einstein once described as "spooky action at a distance."

Now they speak English at the end. Note taken, read last paragraph then read the article.

 

[ChineseTiger1986]

mozi
not micus

That's right, I hate those romanticized names.

 

[Bussard Ramjet]

China's scientists propose a quantum brain more complex than a galaxy

the source of human dominance

http://www.dailygalaxy.com/my_weblo...-a-galaxy-the-source-of-human-dominance-.html

@Bussard Ramjet

China is good at expanding on other people's theories. In the piece itself you can read that the theory of photon communication was already proposed.

Time, China gets better at totally original breakthroughs. Quantum Satellite is a start.

 

[Kiss_of_the_Dragon]

China is good at expanding on other people's theories. In the piece itself you can read that the theory of photon communication was already proposed.

Time, China gets better at totally original breakthroughs. Quantum Satellite is a start.

That how western had exploited our invention such as gun powder and allowed them expanding and make better gun powder weapons to use against China...and ironically now they accuse Chinese of doing copy and past of their design and patent...or maybe they're too scare that China will exceed them one day, I think we Chinese are awaken, we will do our best to explore western theory and walk right through the uncharted territory instead of always following Western food steps. Quantum sat is indeed the first step.

 

[CAPRICORN-88]

This will formed an important aspect of China's growing ASYMMETRICAL EDGE over USA.

Apart from the fact, USAF stealth warplanes including theF22, F35, B1, B2 are all visible to China defense forces and all it takes is to send some of the J-10A or its variants to shoot these lightly armed planes down.

 

[xunzi]

Beside the practical use of quantum mechanical understanding on technology, it will also have a profound implication on life and the universe law at large.

 

[TaiShang]

Now they speak English at the end. Note taken, read last paragraph then read the article.

Science and speculation at times are inseparable, as it seems.

My research method professor, a social scientist, used to say, 'science starts with creativity.'

 

[ChineseTiger1986]

Mozi is now conducting the communication with the ground.

 

[Beny Karachun]

Mind explaining what's "Quantum communication" is?
Or that laser?

 

[TaiShang]

Mind explaining what's "Quantum communication" is?
Or that laser?

China has launched the first satellite for quantum communications, Mozi, into a 600km sun-synchronous orbit. The satellite is designed to facilitate transmission of entangled photons from a ground station in Beijing to one in Vienna; this would allow quantum key encrypted communications over about 7,000km, versus the current record of a few hundred kilometres over fibre. The satellite is also intended to demonstrate quantum teleportation over this distance, again compared to current records of a few hundred kilometres. According to one of the physicists on the team, the satellite could be followed by others if successful, allowing transmission of quantum information across the globe.

http://forum.kerbalspaceprogram.com/index.php?/topic/145987-quantum-science-satellite-mozi/

 

[TaiShang]

i thought this jew was supposed to be smart. why is he asking ?

LOL.

In fact, could be anyone. The way the poster posts, I suspect a potential false-flagger. Nonetheless, the question was a concise one and allowed to put some more light on the issue.

 

[Viet]

China has launched the first satellite for quantum communications, Mozi, into a 600km sun-synchronous orbit. The satellite is designed to facilitate transmission of entangled photons from a ground station in Beijing to one in Vienna; this would allow quantum key encrypted communications over about 7,000km, versus the current record of a few hundred kilometres over fibre. The satellite is also intended to demonstrate quantum teleportation over this distance, again compared to current records of a few hundred kilometres. According to one of the physicists on the team, the satellite could be followed by others if successful, allowing transmission of quantum information across the globe.

http://forum.kerbalspaceprogram.com/index.php?/topic/145987-quantum-science-satellite-mozi/

That does not explain anything how it works in principle:

photon teleportation, quantum key exchange and quantum communications between Beijing and Vienna via a satellite.

Nothing is revealed what technology is used.

 

[yusheng]

ANYONE want to know wha it really is, just read the following articles if you can understand.

the main author J. W. PAN is also the leader of this project (Quantum communication).

1：JWPan,ZBChen,MZukowski,HWeinfurter,AZeilinger， Multi-photon Entanglement and Interferometry，Reviews of Modern Physics 2012.[22]
2：ZSYuan,XHBao,CYLu,JZhang,CZPeng,JW Pan，Entangled Photons and Quantum Communication，Physics Reports,2010,497:1.
3：ZSYuan,YAChen,BZhao,SChen,JSchmiedmayer,JWPan,Experimental Demonstration of a BDCZ Quantum Repeater Node，Nature,2008,454：1098.
4：YAChen,SChen,ZSYuan,BZhao,CSChu,JSchmiedmayer ,JWPan ，Memory-built-in Quantum Teleportation with Photonic and Atomic Qubits,Nature Physics,2008,4:103~107.
5：ZZhao,YAChen,ANZhang,TYang,HBriegel,JW Pan，Experimental Demonstration of Five-photon Entanglement and Open- destination Quantum Teleportation，Nature,2004,430:54.
6：DBouwmeester,JWPan,KMattle,MEibl,HWeinfurter,AZeilinger,Experi mental Quantum Teleportation，Nature,1997,390：575.
7：JWPan,DBouwmeester,HWeinfurter,AZeilinger，Experimental Entanglement Swapping: Entangling Photons that Never Interacted，Physical Review Letters,1998,80：3891.
8：JWPan,DBouwmeester,MDaniell,HWeinfurter,AZeilinger， Experimental Test of Quantum Nonlocality in Three-Photon Greenberger-Horne- Zeilinger Entanglement，Nature,2000,403：515.
9：JWPan,CSimon,CBrukner,AZeilinger，Entanglement Purification for Quantum Communication，Nature,2001,410：1067.
10：JWPan,SGasparoni,MAspelmeyer,TJennwein,AZeilinger， Experimental Realization of Freely Propagating Teleported Qubits， Nature,2003,421:721.
11：JWPan,SGasparoni,RUrsin,GWeihs,AZeilinger，Experimental Entanglement Purification of Arbitrary Unknown States，Nature,2003,423:417.
12：WPhilip,JWPan,MAspelmayer,RUrsin,SGasparoni,AZeilinger,A four-photon Young s Double-slit Experiment，Nature,2004,429:158.[1]

 

[yusheng]

one of his article:

Quantum teleportation of multiple degrees of freedom of a single photon

Abstract
Quantum teleportation provides a 'disembodied' way to transfer quantum states from one object to another at a distant location, assisted by previously shared entangled states and a classical communication channel. As well as being of fundamental interest, teleportation has been recognized as an important element in long-distance quantum communication, distributed quantum networks and measurement-based quantum computation. There have been numerous demonstrations of teleportation in different physical systems such as photons, atoms, ions, electrons and superconducting circuits. All the previous experiments were limited to the teleportation of one degree of freedom only. However, a single quantum particle can naturally possess various degrees of freedom--internal and external--and with coherent coupling among them. A fundamental open challenge is to teleport multiple degrees of freedom simultaneously, which is necessary to describe a quantum particle fully and, therefore, to teleport it intact. Here we demonstrate quantum teleportation of the composite quantum states of a single photon encoded in both spin and orbital angular momentum. We use photon pairs entangled in both degrees of freedom (that is, hyper-entangled) as the quantum channel for teleportation, and develop a method to project and discriminate hyper-entangled Bell states by exploiting probabilistic quantum non-demolition measurement, which can be extended to more degrees of freedom. We verify the teleportation for both spin-orbit product states and hybrid entangled states, and achieve a teleportation fidelity ranging from 0.57 to 0.68, above the classical limit. Our work is a step towards the teleportation of more complex quantum systems, and demonstrates an increase in our technical control of scalable quantum technologies.