论文标题
量子混沌系统中相互作用引起的定向运输
Interaction-induced directed transport in quantum chaotic systems
论文作者
论文摘要
通过适当打破电势中的时空对称性，可以在非相互作用，确定性的混乱系统中实现量子的转运。在这项工作中，重点是经典限制混乱的相互作用量子系统类别。在此限制下，一个子系统有效地充当了另一个导致时间对称性破坏的“噪声”来源。因此，可以用两种成分生成量子电流 - 在相互作用的潜在和存在下空间对称性破裂。这在两体相互作用的踢转子并踢了哈珀模型中证明了这一点。与单粒子棘轮电流使用的早期方案不同，这项工作为实现相互作用系统中的量子定向传输提供了最小的框架。这可以推广到多体量子混沌系统。
Quantum directed transport can be realized in non-interacting, deterministic, chaotic systems by appropriately breaking the spatio-temporal symmetries in the potential. In this work, the focus is on the class of interacting quantum systems whose classical limit is chaotic. In this limit, one subsystem effectively acts as a source of "noise" to the other leading to temporal symmetry breaking. Thus, the quantum directed currents can be generated with two ingredients -- broken spatial symmetry in the potential and presence of interactions. This is demonstrated in two-body interacting kicked rotor and kicked Harper models. Unlike earlier schemes employed for single-particle ratchet currents, this work provides a minimal framework for realizing quantum directed transport in interacting systems. This can be generalized to many-body quantum chaotic systems.
