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Quantum channel using photon number correlated twin beams

We report quantum communications channel using photon number correlated twin beams. The twin beams are generated from a nondegenerate optical parametric oscillator, and the photon number difference is used to encode the signal. The bit error rate of our system will be 0.067 by using the twin beams comparing with 0.217 by using the coherent state as the signal carrier.

preprint2004arXivOpen access
Yun ZhangKatsuyuki KasaiKazuhiro Hayasaka
quant-ph
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Open access3 authors1 topic
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Yun ZhangKatsuyuki KasaiKazuhiro Hayasaka

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