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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.


Input-output structure of quantum CDMA network.The black dashed lines denote the desired chaotic synchronization channel. The red lines show the quantum optical channels. “LA” refers to linear amplifier. “BS” refers to beamsplitter. “CPS” denotes chaotic phase shifter.
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f6: Input-output structure of quantum CDMA network.The black dashed lines denote the desired chaotic synchronization channel. The red lines show the quantum optical channels. “LA” refers to linear amplifier. “BS” refers to beamsplitter. “CPS” denotes chaotic phase shifter.

Mentions: Here we calculate the input-output relationship of the quantum CDMA network shown in Fig. 6, we can express the input-output relationships of the chaotic phase shifters CPSi = 1,2,3,4 as and those of the two beam splitters BS1 and BS2 and the linear quantum amplifier “LA”, respectively, as and Then, using Eqs. (12–15), we obtain the total input-output relationship of the quantum network as where θ1 and θ2 are independent chaotic “noises” as we have not considered chaos synchronization yet.


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)

Input-output structure of quantum CDMA network.The black dashed lines denote the desired chaotic synchronization channel. The red lines show the quantum optical channels. “LA” refers to linear amplifier. “BS” refers to beamsplitter. “CPS” denotes chaotic phase shifter.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f6: Input-output structure of quantum CDMA network.The black dashed lines denote the desired chaotic synchronization channel. The red lines show the quantum optical channels. “LA” refers to linear amplifier. “BS” refers to beamsplitter. “CPS” denotes chaotic phase shifter.
Mentions: Here we calculate the input-output relationship of the quantum CDMA network shown in Fig. 6, we can express the input-output relationships of the chaotic phase shifters CPSi = 1,2,3,4 as and those of the two beam splitters BS1 and BS2 and the linear quantum amplifier “LA”, respectively, as and Then, using Eqs. (12–15), we obtain the total input-output relationship of the quantum network as where θ1 and θ2 are independent chaotic “noises” as we have not considered chaos synchronization yet.

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.