论文标题
量子记忆增强了非平衡稳态中的耗散性纠缠创造
Quantum memory enhanced dissipative entanglement creation in non-equilibrium steady states
论文作者
论文摘要
本文研究了纠缠非平衡稳态（NESS）的耗散制备。我们构建了一个碰撞模型，其中开放系统由两个量子位组成，这些量子位与温度不同的热储层耦合。浴缸由与开放系统相互作用的量子位序列建模。该模型可以在不同的动力学方面进行研究：具有和没有环境记忆效应。我们报告说，只有一定的浴室温度范围才能纠缠。此外，我们通过系统获得热电流的最小和最大临界值。令人惊讶的是，量子记忆效应在长期限制中起着至关重要的作用。首先，记忆效应拓宽了可能耗散量子相关的参数区域，其次，它们增加了可实现的同时发生。最值得注意的是，我们发现一个热流范围不仅允许，而且可以保证NES被纠缠。因此，热电流可以目睹非平衡稳态的纠缠。
This Article investigates dissipative preparation of entangled non-equilibrium steady states (NESS). We construct a collision model where the open system consists of two qubits which are coupled to heat reservoirs with different temperatures. The baths are modeled by sequences of qubits interacting with the open system. The model can be studied in different dynamical regimes: with and without environmental memory effects. We report that only a certain bath temperature range allows for entangled NESS. Furthermore, we obtain minimal and maximal critical values for the heat current through the system. Surprisingly, quantum memory effects play a crucial role in the long time limit. First, memory effects broaden the parameter region where quantum correlated NESS may be dissipatively prepared and, secondly, they increase the attainable concurrence. Most remarkably, we find a heat current range that does not only allow but guarantees that the NESS is entangled. Thus, the heat current can witness entanglement of non-equilibrium steady states.
