局域驱动有耗量子比特阵列的非平衡稳态
Out-of-equilibrium steady states of a locally driven lossy qubit array
摘要：
我们发现了丰富的各种各样的违反直觉的功能，在稳态的量子比特阵列耦合到一个耗散源和汇在两个任意的网站，使用主方程的方法。我们表明，有设置增加泵浦和损耗率建立远程相干。在足够强的耗散，源或汇有效地产生其相邻网站之间的相关性，导致一个惊人的密度波秩序的一类“共振”的几何形状。这种效应可以更广泛地应用于非平衡相的设计。我们表明，稳定的状态是一般不同的硬核玻色子和自由费米子，并显着不同于以前发现的特殊情况下。它们解释了普遍适用的ansatzes的长时间动态在弱和强耗散。我们的发现与现有的光子设置有关。
英文摘要：
We find a rich variety of counterintuitive features in the steady states of a qubit array coupled to a dissipative source and sink at two arbitrary sites, using a master equation approach. We show there are setups where increasing the pump and loss rates establishes long-range coherence. At sufficiently strong dissipation, the source or sink effectively generates correlation between its neighboring sites, leading to a striking density-wave order for a class of "resonant" geometries. This effect can be used more widely to engineer nonequilibrium phases. We show the steady states are generically distinct for hard-core bosons and free fermions, and differ significantly from the ones found before in special cases. They are explained by generally applicable ansatzes for the long-time dynamics at weak and strong dissipation. Our findings are relevant for existing photonic setups.
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