论文标题
相互作用引起的隧道在极晶格玻色子动力学中的作用
The role of interaction-induced tunneling in the dynamics of polar lattice bosons
论文作者
论文摘要
即使在没有障碍的情况下，地点间偶极相互作用也会引起光学晶格中偶极玻色子的有趣的非连接动力学。我们表明，固有的偶极子诱导的密度依赖性隧道（通常被忽略）在该动力学中起着至关重要的作用。对于浅 - 晶格，由相互作用引起的跳跃引起的离域化克服了地点间相互作用引起的定位。结果，与更为研究的硬核玻色子的情况形成鲜明对比，当偶极强度提高时，临时性将在违反直觉上得到增强。此外，裸露和相互作用引起的隧穿之间的准策略可能导致偶极强度的晶格深度依赖性值，这是偶然的脱芯态的精确脱钩，而希尔伯特（Ergodic）硬核状态和强烈非抗稳定核心方面之间的希尔伯特（Hilbert）空间的确切脱钩。我们的结果表明，相互作用引起的跳跃应该在对极性晶格气体动力学的未来实验中起关键作用。
Inter-site dipolar interactions induce, even in absence of disorder, an intriguing non-ergodic dynamics for dipolar bosons in an optical lattice. We show that the inherent dipole-induced density-dependent tunneling, typically neglected, plays a crucial role in this dynamics. For shallow-enough lattices, the delocalization stemming from the interaction-induced hopping overcomes the localization induced by inter-site interactions. As a result, in stark contrast to the more studied case of hard-core bosons, delocalization is counter-intuitively strengthen when the dipolar strength increases. Furthermore, the quasi-cancellation between bare and interaction-induced tunneling may lead, near a lattice-depth-dependent value of the dipole strength, to an exact decoupling of the Hilbert space between ergodic hard-core states and strongly non-ergodic soft-core ones. Our results show that interaction-induced hopping should play a crucial role in future experiments on the dynamics of polar lattice gases.
