论文标题
量子信息在带有可调范围相互作用的被困离子量子模拟器中争夺
Quantum information scrambling in a trapped-ion quantum simulator with tunable range interactions
论文作者
论文摘要
在奇异的多体量子系统中，局部编码的量子信息随着时间的流逝而变得无法访问局部测量。这种“争夺”的概念目前具有强烈的研究兴趣，需要深入了解多体动态，例如混乱和热化过程。在这里，我们通过通过随机测量估算超时有序的相关器（OTOC）来介绍在代表可调远距离相互作用的旋转系统的10量离子量子模拟器上争夺的量子信息的第一个实验证明。我们还通过比较我们的测量值与数值模拟并测量rényi纠缠熵来分析变质在系统中的作用。
In ergodic many-body quantum systems, locally encoded quantum information becomes, in the course of time evolution, inaccessible to local measurements. This concept of "scrambling" is currently of intense research interest, entailing a deep understanding of many-body dynamics such as the processes of chaos and thermalization. Here, we present first experimental demonstrations of quantum information scrambling on a 10-qubit trapped-ion quantum simulator representing a tunable long-range interacting spin system, by estimating out-of-time ordered correlators (OTOCs) through randomized measurements. We also analyze the role of decoherence in our system by comparing our measurements to numerical simulations and by measuring Rényi entanglement entropies.
