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中文摘要：
We explore how a two-mode squeezed vacuum state sechθ e a b tanh θ |00 evolves when it undergoes a single-mode 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 b ln[(1-e-2κt)tanh 2 θ]}.The outcome state is no more a pure state,but an entangled mixed state.
英文摘要：
We explore how a two-mode squeezed vacuum state sechθeab tanh θ[00） evolves when it undergoes a single- mode amplitude dissipative channel with rate of decay k. We find that in this process not only the squeezing parameter decreases, tanhθ → e-kt tanh θ, but also the second-mode vacuum state evolves into a chaotic state exp{bbln[（1 - e-2kt） tanh2 θ]}. The outcome state is no more a pure state, but an entangled mixed state.
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