An Autonomous Stabilizer for Incompressible Photon Fluids and Solids
An Autonomous Stabilizer for Incompressible Photon Fluids and Solids
复制标题
不可压缩光子流体和固体的自主稳定器
DOI：
10.1103/physreva.95.043811
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
Jonathan Simon
中科院分区：
文献类型：
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作者：
R. Ma;Clai Owens;A. Houck;D. Schuster;Jonathan Simon
我们提出了一种在非零化学势和近零温度下填充光子量子材料的简单方法。从冷原子实验中的强迫蒸发中得到启发，我们的低熵热库的基本成分是(A)粒子间的相互作用，和(B)与能量有关的损失。然后，产生的热库可以耦合到一大类哈密顿系统，以产生低熵量子相。我们给出了这样一个储存库的理想化图景，推导了储存库熵随系统参数的标度，然后提出了几种仅使用标准电路量子电动力学工具的实际实现，并提取了基本的性能极限。最后，我们从解析和数值两个方面探索了这种热化器与典型的Bose-Hubbard链的耦合，并利用它稳定了$n=1$Mott相。在这种情况下，性能受到Mott绝缘体的动态受阻热化和热化器有限的热容量的相互作用的限制，其特征是再抽速。这项工作探索了一种制备强相互作用光子量子相的新方法，并为获得绝热演化难以达到的拓扑保护相提供了一条潜在的途径。
We suggest a simple approach to populate photonic quantum materials at non-zero chemical potential and near-zero temperature. Taking inspiration from forced evaporation in cold-atom experiments, the essential ingredients for our low-entropy thermal reservoir are (a) inter-particle interactions, and (b) energy-dependent loss. The resulting thermal reservoir may then be coupled to a broad class of Hamiltonian systems to produce low-entropy quantum phases. We present an idealized picture of such a reservoir, deriving the scaling of reservoir entropy with system parameters, and then propose several practical implementations using only standard circuit quantum electrodynamics tools, and extract the fundamental performance limits. Finally, we explore, both analytically and numerically, the coupling of such a thermalizer to the paradigmatic Bose-Hubbard chain, where we employ it to stabilize an $n=1$ Mott phase. In this case, the performance is limited by the interplay of dynamically arrested thermalization of the Mott insulator and finite heat capacity of the thermalizer, characterized by its repumping rate. This work explores a new approach to preparation of quantum phases of strongly interacting photons, and provides a potential route to topologically protected phases that are difficult to reach through adiabatic evolution.