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Dissipation of a two-mode squeezed vacuum state in the single-mode amplitude damping channel |
Zhou Nan-Run(周南润)a)†, Hu Li-Yun(胡利云) b), and Fan Hong-Yi(范洪义)c) |
a Department of Electronic Information Engineering, Nanchang University, Nanchang 330031, China; b Department of Physics, Shanghai Jiao Tong University, Shanghai 200030, China; c School of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, China |
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Abstract We explore how a two-mode squeezed vacuum state sechθ ea+b+ tanh θ |00> evolves when it undergoes a singlemode amplitude dissipative channel with rate of decay κ. We find that in this process not only the squeezing parameter decreases, tanh θ → e-κt tanh θ, but also the second-mode vacuum state evolves into a chaotic state exp{b+bln[1 - e-2κt tanh2 θ]}. The outcome state is no more a pure state, but an entangled mixed state.
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Received: 05 April 2011
Revised: 17 June 2011
Accepted manuscript online:
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PACS:
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03.65.-w
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(Quantum mechanics)
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42.50.-p
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(Quantum optics)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11047133 and 10647133), the Natural Science Foundation of Jiangxi Province of China (Grant Nos. 2009GQS0080 and 2010GQW0027), and the Research Foundation of the Education Department of Jiangxi Province of China (Grant Nos. GJJ11339 and GJJ10097). |
Cite this article:
Zhou Nan-Run(周南润), Hu Li-Yun(胡利云), and Fan Hong-Yi(范洪义) Dissipation of a two-mode squeezed vacuum state in the single-mode amplitude damping channel 2011 Chin. Phys. B 20 120301
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