中国实现世界上最远距离量子态隐形传输

新通信技术？

这个比较科幻

很牛的技术，据称是完全不可能破解的！我顶！

印象中叫潘建伟吧，牛人啊……见过他，真不错的，德国回来的吧……嗯嗯

祝贺，  可能离实用还有点距离

我朝真有此神技了吗 幸哉乐哉妙哉

很科幻，TG也有天顶星科技了？。。。但是为毛是发在海版？{:yi:}

不懂，求科普:D

哇。不懂。
好象是不可拦截，不过还有其他什么优势？速率？带宽？

这个不错啊，什么时候能投入使用？

不懂，求科普，话说量子技术和这个毛关系？

什么意思？可以时空穿越？那直接把城管传到美国去，拯救一下美国人民。

why_together 发表于 2010-6-4 10:46

可拦截,但不能破译

对潜通信，不多说

隐隐感到TG在多个技术领域的进展要进入一个爆发期了，热切期盼之

红旗渠 发表于 2010-6-4 11:29


    大神级的人物，还是回网天等地合适。

还对潜通讯？人类难道实现了量子编码，能自由产生所需要的量子纠缠态？

感觉就像星球大战啊，天朝威武！！[:a2:]

海版又有？《照样顶。
不知要多久才能商用

如果仅仅是为了保密，显然不是很迫切地需要

如果仅仅是为了保密，显然不是很迫切地需要

坐着等产品{:cha:}

求科普

Quantum teleportation achieved over 16 km
May 20, 2010 by Lin Edwards
a, A birds-eye view of the 16-km free-space quantum teleportation experiment. Charlie sends photon 1 to Alice for BSM. Classical information, including the results of the BSM and the signal for time synchronization, is sent through the free-space channel with photon 2, to Bob, before decoding and triggering of the corresponding unitary transformation. b, Sketch of the experimental system. See the original paper for more details. Image copyright: Nature Photonics, doi:10.1038/nphoton.2010.87

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

Quantum teleportation is not the same as the teleportation most of us know from science fiction, where an object (or person) in one place is “beamed up” to another place where a perfect copy is replicated. In quantum teleportation two photons or ions (for example) are entangled in such a way that when the quantum state of one is changed the state of the other also changes, as if the two were still connected. This enables quantum information to be teleported if one of the photons/ions is sent some distance away.

In previous experiments the photons were confined to fiber channels a few hundred meters long to ensure their state remained unchanged, but in the new experiments pairs of photons were entangled and then the higher-energy photon of the pair was sent through a free space channel 16 km long. The researchers, from the University of Science and Technology of China and Tsinghua University in Beijing, found that even at this distance the photon at the receiving end still responded to changes in state of the photon remaining behind. The average fidelity of the teleportation achieved was 89 percent.

The distance of 16 km is greater than the effective aerosphere thickness of 5-10 km, so the group's success could pave the way for experiments between a ground station and a satellite, or two ground stations with a satellite acting as a relay. This means quantum communication applications could be possible on a global scale in the near future.

The public free space channel was at ground level and spanned the 16 km distance between Badaling in Beijing (the teleportation site) and the receiver site at Huailai in Hebei province. Entangled photon pairs were generated at the teleportation site using a semiconductor, a blue laser beam, and a crystal of beta-barium borate (BBO). The pairs of photons were entangled in the spatial modes of photon 1 and polarization modes of photon 2. The research team designed two types of telescopes to serve as optical transmitting and receiving antennas.

The experiments confirm the feasibility of space-based quantum teleportation, and represent a giant leap forward in the development of quantum communication applications.
国外很多网站都报道了,大家自己去看吧,很多老外都有回复.
http://www.physorg.com/news193551675.html
http://www.popsci.com/science/ar ... ation-over-10-miles



Quantum teleportation achieved over 16 km
May 20, 2010 by Lin Edwards
a, A birds-eye view of the 16-km free-space quantum teleportation experiment. Charlie sends photon 1 to Alice for BSM. Classical information, including the results of the BSM and the signal for time synchronization, is sent through the free-space channel with photon 2, to Bob, before decoding and triggering of the corresponding unitary transformation. b, Sketch of the experimental system. See the original paper for more details. Image copyright: Nature Photonics, doi:10.1038/nphoton.2010.87

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

Quantum teleportation is not the same as the teleportation most of us know from science fiction, where an object (or person) in one place is “beamed up” to another place where a perfect copy is replicated. In quantum teleportation two photons or ions (for example) are entangled in such a way that when the quantum state of one is changed the state of the other also changes, as if the two were still connected. This enables quantum information to be teleported if one of the photons/ions is sent some distance away.

In previous experiments the photons were confined to fiber channels a few hundred meters long to ensure their state remained unchanged, but in the new experiments pairs of photons were entangled and then the higher-energy photon of the pair was sent through a free space channel 16 km long. The researchers, from the University of Science and Technology of China and Tsinghua University in Beijing, found that even at this distance the photon at the receiving end still responded to changes in state of the photon remaining behind. The average fidelity of the teleportation achieved was 89 percent.

The distance of 16 km is greater than the effective aerosphere thickness of 5-10 km, so the group's success could pave the way for experiments between a ground station and a satellite, or two ground stations with a satellite acting as a relay. This means quantum communication applications could be possible on a global scale in the near future.

The public free space channel was at ground level and spanned the 16 km distance between Badaling in Beijing (the teleportation site) and the receiver site at Huailai in Hebei province. Entangled photon pairs were generated at the teleportation site using a semiconductor, a blue laser beam, and a crystal of beta-barium borate (BBO). The pairs of photons were entangled in the spatial modes of photon 1 and polarization modes of photon 2. The research team designed two types of telescopes to serve as optical transmitting and receiving antennas.

The experiments confirm the feasibility of space-based quantum teleportation, and represent a giant leap forward in the development of quantum communication applications.
国外很多网站都报道了,大家自己去看吧,很多老外都有回复.
http://www.physorg.com/news193551675.html
http://www.popsci.com/science/ar ... ation-over-10-miles

据说是不可破译的

好技术

天顶星技术，值得自豪:D

天顶星技术，值得自豪

nncd 发表于 2010-6-4 12:08

你低估了安全的重要性。社会要电子化，信息化，安全是基石。没有这块基石上面就无法发展。
这技术要是能商业化成本又能接受，立刻就会普及。

并非不可破译，只是一旦被拦截，必能发现

:D:D

http://www.physorg.com/news193551675.html

{:wu:}听上去好科幻啊，因为完全听不懂，嘎嘎。

好事！期待量子时代有中国强有力的声音

潘建伟，东阳中学的牛人

这项技术将来可能发展成传输实物吗？比方人

什么技术？不懂

感觉很科幻

记得原来看过一个日本未来十五年军事科技发展规划，其中就有量子通讯实用化研究这一条，当时还觉得小日本很嚣张，现在看来......{:jian:}

暂时还没去看链接文，我理解，fidelity是指纠缠态量子的其中一个对另一个在状态改变时的作出的正确响应达到89%吗？

暂时还没去看链接文，我理解，fidelity是指纠缠态量子的其中一个对另一个在状态改变时的作出的正确响应达到89%吗？

用来迅速运载城管。。

这个有点牛啊，啥时候才能实现啊！

弄只老鼠先试试[:a6:]