中国物理B ›› 2011, Vol. 20 ›› Issue (12): 120301-120301.doi: 10.1088/1674-1056/20/12/120301
周南润1, 范洪义2, 胡利云3
Zhou Nan-Run(周南润)a)†, Hu Li-Yun(胡利云) b), and Fan Hong-Yi(范洪义)c)
摘要: 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.
中图分类号: (Quantum mechanics)