论文标题
量子信息在存在弱和较强的热化的情况下争夺
Quantum information scrambling in the presence of weak and strong thermalization
论文作者
论文摘要
在多体动力学下争夺的量子信息具有根本的兴趣。三方共同信息可以通过其负值来量化扰动。在这里，我们首先研究了在不可融合的ISING模型中三方共同信息的淬灭动力学，其中观察到具有不同初始状态的强和弱热化。我们从数值上表明，当所选初始状态的能量密度具有最大状态时，最快的争夺可能会发生。然后，我们提出了一个实验方案，用于观察超导量子阵列中弱和强的热化。基于该方案，可以通过超导量子模拟直接验证这项工作中揭示的争夺与热化之间的关系。
Quantum information scrambling under many-body dynamics is of fundamental interest. The tripartite mutual information can quantify the scrambling via its negative value. Here, we first study the quench dynamics of tripartite mutual information in a non-integrable Ising model where the strong and weak thermalization are observed with different initial states. We numerically show that the fastest scrambling can occur when the energy density of the chosen initial state possesses the maximum density of states. We then present an experimental protocol for observing weak and strong thermalization in a superconducting qubit array. Based on the protocol, the relation between scrambling and thermalization revealed in this work can be directly verified by superconducting quantum simulations.
