Stabilizing a discrete time crystal against dissipation
Stabilizing a discrete time crystal against dissipation
复制标题
稳定离散时间晶体以防止耗散
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
A. Carmele
中科院分区：
文献类型：
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作者：
Leon Droenner;Regina Finsterholzl;M. Heyl;A. Carmele
本征态相，如离散时间晶体，在与环境耦合时表现出固有的不稳定性，这恢复了能量的均分，因此与保护的非遍量性相反。在这里，我们证明了离散时间晶体可以使用相干反馈来稳定耗散。对于受辐射衰减影响的踢出的随机伊辛链，我们证明了时间晶体信号可以通过反射镜反射发射光子的相长干涉机制存活下来。我们引入矩阵乘积算子算法来求解由此产生的非马尔可夫动力学。我们发现该稳定机制对弱缺陷具有鲁棒性。
Eigenstate phases such as the discrete time crystal exhibit an inherent instability upon the coupling to an environment, which restores equipartition of energy and therefore acts against the protecting nonergodicity. Here, we demonstrate that a discrete time crystal can be stabilized against dissipation using coherent feedback. For a kicked random Ising chain subject to a radiative decay, we show that the time crystalline signal can survive through a mechanism of constructive interference upon reflecting the emitted photons by a mirror. We introduce a matrix product operator algorithm to solve the resulting non-Markovian dynamics. We find that the stabilization mechanism is robust against weak imperfections.