标题： 费米子通过驱动量子点接触的输运：超越临界驱动频率的弗洛凯热化破坏 显示英文标题

标题： Fermionic transport through a driven quantum point contact: breakdown of Floquet thermalization beyond a critical driving frequency

摘要： 我们研究一个由两个费米链通过驱动量子点接触（QPC）耦合的量子系统。 QPC 包含一个具有周期性变化的隧穿幅度的键。 最初，左侧链被费米子填满，而右侧链是空的。 我们数值追踪系统的演化，并证明在高于临界频率的情况下，通过 QPC 的电流停止，链之间的粒子不平衡将永远保持。 这表明了弗洛凯版本的本征态热化假设的显著失效，该假设预测在长时间后粒子密度分布是均匀的。 我们确认了该效应在各种驱动协议和粒子间相互作用下的存在。 显示英文摘要

摘要： We study a quantum system that consists of two fermionic chains coupled by a driven quantum point contact (QPC). The QPC contains a bond with a periodically varying tunneling amplitude. Initially the left chain is packed with fermions while the right one is empty. We numerically track the evolution of the system and demonstrate that, at frequencies above a critical one, the current through the QPC halts, and the particle imbalance between the chains remains forever. This implies a spectacular breakdown of the Floquet version of the eigenstate thermalization hypothesis which predicts a homogeneous particle density profile at large times. We confirm the effect for various driving protocols and interparticle interactions.