论文标题
在多体定位系统中浴诱导的量子雪崩的签名
Signatures of bath-induced quantum avalanches in a many-body--localized system
论文作者
论文摘要
当远离平衡的状态时，紧密相关的系统可以表现出令人惊讶的现象。一个壮观的例子是量子雪崩，预测通过多体定位系统运行并将其定位。当将系统局部耦合到充当浴缸的小热包含时，就会发生量子雪崩。在这里，我们实现了多体定位的系统与可变大小的热包含之间的界面，并研究了其动力学。我们找到了加速运输到局部区域的证据，即量子雪崩的标志。通过测量站点分辨的熵，我们监视雪崩如何通过本地化系统行驶并按场地进行热量。此外，我们通过评估浴缸和系统之间的多点相关性来隔离浴室诱导的动力学。我们的结果对多体定位系统及其批判行为具有根本性的影响。
Strongly correlated systems can exhibit surprising phenomena when brought in a state far from equilibrium. A spectacular example are quantum avalanches, that have been predicted to run through a many-body--localized system and delocalize it. Quantum avalanches occur when the system is locally coupled to a small thermal inclusion that acts as a bath. Here we realize an interface between a many-body--localized system and a thermal inclusion of variable size, and study its dynamics. We find evidence for accelerated transport into the localized region, signature of a quantum avalanche. By measuring the site-resolved entropy we monitor how the avalanche travels through the localized system and thermalizes it site by site. Furthermore, we isolate the bath-induced dynamics by evaluating multipoint correlations between the bath and the system. Our results have fundamental implications on the robustness of many-body--localized systems and their critical behavior.
