Non-equilibrium quantum phase transition via entanglement decoherence dynamics

作者：Lin Yu Chen; Yang Pei Yun; Zhang Wei Min^*

来源：Scientific Reports, 2016, 6(1): 34804.

DOI：10.1038/srep34804

We investigate the decoherence dynamics of continuous variable entanglement as the system-environment coupling strength varies from the weak-coupling to the strong-coupling regimes. Due to the existence of localized modes in the strong-coupling regime, the system cannot approach equilibrium with its environment, which induces a nonequilibrium quantum phase transition. We analytically solve the entanglement decoherence dynamics for an 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 3-D entanglement quantum phase diagram is obtained.

• 出版日期2016-10-7