Enhanced Optimal Quantum Communication by Generalized Phase Shift Keying Coherent Signal

• URL: http://arxiv.org/abs/2112.14425v1
• Date: Wed, 29 Dec 2021 07:13:50 GMT
• Title: Enhanced Optimal Quantum Communication by Generalized Phase Shift Keying Coherent Signal
• Authors: Min Namkung and Jeong San Kim
• Abstract summary: We consider the quantum communication with $N$-ary phase shift keying ($N$-PSK) signal for an arbitrary positive integer $N>1$. Unlike the binary case, we show that even super-Poissonianity of non-standard coherent state can improve the maximal success probability of $N$-PSK quantum communication.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: It is well known that the maximal success probability of the binary quantum communication can be improved by using a sub-Poissonian non-standard coherent state as an information carrier. In the present article, we consider the quantum communication with $N$-ary phase shift keying ($N$-PSK) signal for an arbitrary positive integer $N>1$. By using non-standard coherent state, we analytically provide the maximal success probability of the quantum communication with $N$-PSK. Unlike the binary case, we show that even super-Poissonianity of non-standard coherent state can improve the maximal success probability of $N$-PSK quantum communication.

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