标题： 可配置光子芯片上的碰撞辅助信息加扰 显示英文标题

标题： Collision-assisted information scrambling on a configurable photonic chip

摘要： 量子干涉和纠缠是量子计算的核心。量子电路中信息的快速传播有助于减少电路深度。尽管在封闭系统中的信息混乱已在数字电路中被提出并测试，但如何衡量系统与环境之间量子关联的演化仍然是一个微妙且开放的问题。在这里，我们提出了一种光子电路，通过使用级联Mach-Zehnder干涉仪实现碰撞模型来研究开放量子系统中的信息混乱。我们数值模拟了光子传播，并发现三部分互信息强烈依赖于系统-环境和环境-环境相互作用。我们进一步通过设计增强的压缩感知减少了需要重建密度矩阵的可观测量数量和测量次数。我们的结果为模拟开放量子系统提供了一个可重构的光子平台，并为探索离散变量光子计算中的可控耗散和非马尔可夫性铺平了道路。 显示英文摘要

摘要： Quantum interference and entanglement are in the core of quantum computations. The fast spread of information in the quantum circuit helps to mitigate the circuit depth. Although the information scrambling in the closed systems has been proposed and tested in the digital circuits, how to measure the evolution of quantum correlations between systems and environments remains a delicate and open question. Here, we propose a photonic circuit to investigate the information scrambling in an open quantum system by implementing the collision model with cascaded Mach-Zehnder interferometers. We numerically simulate the photon propagation and find that the tripartite mutual information strongly depends on the system-environment and environment-environment interactions. We further reduce the number of observables and the number of shots required to reconstruct the density matrix by designing an enhanced compressed sensing. Our results provide a reconfigurable photonic platform for simulating open quantum systems and pave the way for exploring controllable dissipation and non-Markovianity in discrete-variable photonic computing.