论文标题
量子噪声作为对称性领域
Quantum Noise as a Symmetry-Breaking Field
论文作者
论文摘要
我们研究了量子噪声对被监视的随机量子电路中测量诱导的量子过渡的影响。使用随机Clifford电路的有效模拟性，我们发现该过渡被扩展到交叉，并且相图作为投射测量和噪声的函数表现出几种不同的机制。我们表明，映射到经典的统计力学问题是随机电路相图的主要特征。散装噪声映射到明确的置换对称性破坏耦合；当噪声关闭时，这种对称性会自发断裂。这些结果对嘈杂量子电路中纠缠过渡的实现具有影响。
We investigate the effect of quantum noise on the measurement-induced quantum phase transition in monitored random quantum circuits. Using the efficient simulability of random Clifford circuits, we find that the transition is broadened into a crossover and that the phase diagram as a function of projective measurements and noise exhibits several distinct regimes. We show that a mapping to a classical statistical mechanics problem accounts for the main features of the random circuit phase diagram. The bulk noise maps to an explicit permutation symmetry breaking coupling; this symmetry is spontaneously broken when the noise is switched off. These results have implications for the realization of entanglement transitions in noisy quantum circuits.
