论文标题
量子绝热周期及其故障
Quantum adiabatic cycles and their breakdown
论文作者
论文摘要
提出了一个可解析的用于跨量子临界点的准静态转换的模型，这些模型介绍了具有玻感准粒子激发的量子临界点。该模型证明，绝热性分解是这些系统中通用慢动力学的一般特征。在慢速驱动限制中的基态忠诚度消失的“抗绝热”动力阶段的存在也已被证明。讨论了这些发现与Kibble-Zurek机制的关系及其对在量子相变的许多身体系统中对缺陷形成的影响。
An analytically solvable model for quasi-static transformations across quantum critical points featuring Bosonic quasi-particle excitations is presented. The model proves that adiabaticity breakdown is a general feature of universal slow dynamics in these systems. The existence of an "anti-adiabatic" dynamical phase with vanishing ground state fidelity in the slow drive limit is also proven. The relation of these findings with the Kibble-Zurek mechanism and their consequences on defect formation in many body systems ramped across a quantum phase transition are discussed.
