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Quantum internet using code division multiple access.

Zhang J, Liu YX, Ozdemir SK, Wu RB, Gao F, Wang XB, Yang L, Nori F - Sci Rep (2013)

Bottom Line: A crucial open problem inS large-scale quantum networks is how to efficiently transmit quantum data among many pairs of users via a common data-transmission medium.We propose a solution by developing a quantum code division multiple access (q-CDMA) approach in which quantum information is chaotically encoded to spread its spectral content, and then decoded via chaos synchronization to separate different sender-receiver pairs.In comparison to other existing approaches, such as frequency division multiple access (FDMA), the proposed q-CDMA can greatly increase the information rates per channel used, especially for very noisy quantum channels.

View Article: PubMed Central - PubMed

Affiliation: CEMS, RIKEN, Saitama, 351-0198, Japan. jing-zhang@mail.tsinghua.edu.cn

ABSTRACT
A crucial open problem inS large-scale quantum networks is how to efficiently transmit quantum data among many pairs of users via a common data-transmission medium. We propose a solution by developing a quantum code division multiple access (q-CDMA) approach in which quantum information is chaotically encoded to spread its spectral content, and then decoded via chaos synchronization to separate different sender-receiver pairs. In comparison to other existing approaches, such as frequency division multiple access (FDMA), the proposed q-CDMA can greatly increase the information rates per channel used, especially for very noisy quantum channels.

No MeSH data available.


Related in: MedlinePlus

Diagrams of the quantum multiple access networks.(a) Quantum information transmission between two pairs of nodes via a single quantum channel. Quantum states from two senders are combined to form a superposition state and input to the channel. At the receiver side, they are coherently split into two and sent to the targeted receivers. (b) Schematic diagram of the q-CDMA network by chaotic synchronization. Wave packets from the sender nodes are first spectrally broadened by using the chaotic phase shifters CPS1 and CPS2, and then mixed at a beamsplitter (BS1) and input to the channel. After linear amplification (LA) and splitting at the second beamsplitter (BS2), individual signals are recovered at the receiver end with the help of CPS3 and CPS4, which are synchronized with CPS1 and CPS2, respectively.
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f2: Diagrams of the quantum multiple access networks.(a) Quantum information transmission between two pairs of nodes via a single quantum channel. Quantum states from two senders are combined to form a superposition state and input to the channel. At the receiver side, they are coherently split into two and sent to the targeted receivers. (b) Schematic diagram of the q-CDMA network by chaotic synchronization. Wave packets from the sender nodes are first spectrally broadened by using the chaotic phase shifters CPS1 and CPS2, and then mixed at a beamsplitter (BS1) and input to the channel. After linear amplification (LA) and splitting at the second beamsplitter (BS2), individual signals are recovered at the receiver end with the help of CPS3 and CPS4, which are synchronized with CPS1 and CPS2, respectively.

Mentions: To present the underlying principle of our method, we consider the simplest case, where two pairs of sender and receiver nodes communicate quantum information, encoded into quantized electromagnetic fields with the same frequencies, via a single quantum channel [see Fig. 2(a)].


Quantum internet using code division multiple access.

Zhang J, Liu YX, Ozdemir SK, Wu RB, Gao F, Wang XB, Yang L, Nori F - Sci Rep (2013)

Diagrams of the quantum multiple access networks.(a) Quantum information transmission between two pairs of nodes via a single quantum channel. Quantum states from two senders are combined to form a superposition state and input to the channel. At the receiver side, they are coherently split into two and sent to the targeted receivers. (b) Schematic diagram of the q-CDMA network by chaotic synchronization. Wave packets from the sender nodes are first spectrally broadened by using the chaotic phase shifters CPS1 and CPS2, and then mixed at a beamsplitter (BS1) and input to the channel. After linear amplification (LA) and splitting at the second beamsplitter (BS2), individual signals are recovered at the receiver end with the help of CPS3 and CPS4, which are synchronized with CPS1 and CPS2, respectively.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3713527&req=5

f2: Diagrams of the quantum multiple access networks.(a) Quantum information transmission between two pairs of nodes via a single quantum channel. Quantum states from two senders are combined to form a superposition state and input to the channel. At the receiver side, they are coherently split into two and sent to the targeted receivers. (b) Schematic diagram of the q-CDMA network by chaotic synchronization. Wave packets from the sender nodes are first spectrally broadened by using the chaotic phase shifters CPS1 and CPS2, and then mixed at a beamsplitter (BS1) and input to the channel. After linear amplification (LA) and splitting at the second beamsplitter (BS2), individual signals are recovered at the receiver end with the help of CPS3 and CPS4, which are synchronized with CPS1 and CPS2, respectively.
Mentions: To present the underlying principle of our method, we consider the simplest case, where two pairs of sender and receiver nodes communicate quantum information, encoded into quantized electromagnetic fields with the same frequencies, via a single quantum channel [see Fig. 2(a)].

Bottom Line: A crucial open problem inS large-scale quantum networks is how to efficiently transmit quantum data among many pairs of users via a common data-transmission medium.We propose a solution by developing a quantum code division multiple access (q-CDMA) approach in which quantum information is chaotically encoded to spread its spectral content, and then decoded via chaos synchronization to separate different sender-receiver pairs.In comparison to other existing approaches, such as frequency division multiple access (FDMA), the proposed q-CDMA can greatly increase the information rates per channel used, especially for very noisy quantum channels.

View Article: PubMed Central - PubMed

Affiliation: CEMS, RIKEN, Saitama, 351-0198, Japan. jing-zhang@mail.tsinghua.edu.cn

ABSTRACT
A crucial open problem inS large-scale quantum networks is how to efficiently transmit quantum data among many pairs of users via a common data-transmission medium. We propose a solution by developing a quantum code division multiple access (q-CDMA) approach in which quantum information is chaotically encoded to spread its spectral content, and then decoded via chaos synchronization to separate different sender-receiver pairs. In comparison to other existing approaches, such as frequency division multiple access (FDMA), the proposed q-CDMA can greatly increase the information rates per channel used, especially for very noisy quantum channels.

No MeSH data available.


Related in: MedlinePlus