Nonclassicality of quantum excitation of classical coherent field in photon-loss channel

Shang-Bin Li, Xu-Bo Zou, and Guang-Can Guo

Phys. Rev. A 75, 045801 – Published 9 April 2007

Abstract

We investigate the nonclassicality of photon-added coherent states in the photon-loss channel by exploring the entanglement potential and negative Wigner distribution. The total negative probability defined by the volume of the negative part of the Wigner function reduces with the decay time. The total negative probability and the entanglement potential of pure photon-added coherent states exhibit the similar dependence on the beam intensity. The reduce of the total negative probability is consistent with the behavior of entanglement potential for the dissipative single-photon-added coherent state at short decay times.

Received 5 January 2007

DOI:https://doi.org/10.1103/PhysRevA.75.045801

Authors & Affiliations

Shang-Bin Li^2,*, Xu-Bo Zou¹, and Guang-Can Guo¹

¹Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
²Shanghai Research Center of Amertron-global, Zhangjiang High-Tech Park, 299 Lane, Bisheng Road, No. 3, Suite 202, Shanghai, 201204, People’s Republic of China

^*Electronic address: stephenli74@yahoo.com.cn

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Issue

Vol. 75, Iss. 4 — April 2007

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Physical Review A

covering atomic, molecular, and optical physics and quantum information