我們研究系統和環境弱關連和強關連下，非馬可夫量子糾纏動力學。
當系統和環境在強關連下量子局域態會產生，導致系統和環境最終沒
辦法達到平衡，而非平衡態的量子相變就會產生。
我們給定了不同環境頻譜的非馬可夫量子糾纏動力學的解析解，並且
得到量子糾纏相圖。

We investigate the non-Markovian decoherence dynamics of continuous variable entanglement as the system-environment coupling strength varies from the weak-coupling regime into the strong-coupling regime.Due to the existence of localized bound states in the strong-coupling regime, the system remains in nonequilibrium, and a nonequilibrium quantum phase transition occurs. We analytically solve the entanglement decoherence dynamics for arbitrary spectral density. The nonequilibrium quantum phase transition is demonstrated as the system-environment coupling strength varies for all the Ohmic-type spectral densities. The entanglement quantum phase diagram is obtained.

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