Quantum-gas mixtures with extreme mass imbalance

质量极度不平衡的量子气体混合物

• 批准号: 521285267
• 负责人: Professor Dr. Christian Groß
• 金额: --
• 依托单位: Arbeitsbereich Atomphysik
• 依托单位国家: 德国
• 项目类别: Research Units
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/521285267?language=en
• 关键词: Quantum; gas; mixtures; extreme; mass

In this project we aim to study thermalization dynamics and transport in an atomic Bose-Fermi quantum gas mixture with extreme mass imbalance. The imbalance naturally leads to a very pronounced heterogeneity of timescales in the many-body system. Such a scenario has been predicted to show very slow dynamics, peculiar hydrodynamic behavior and quasi-localization. We will study the relaxation dynamics of light fermions initially brought out of equilibrium, which are immersed in a bath of heavy bosons. First, we will realize a quasi-homogeneous setting in a harmonic trap resembling the Fröhlich polaron scenario for a certain set of parameters. We will then move forward and load the atoms in an optical lattice to study quasi-localization due to dynamic constraints realized by the practically immobile bosons. We will work in close collaboration with several theory partners of the research unit to model and interpret the observed timescales in both settings and to understand the role of kinetic constraints in the system.

在这个项目中，我们的目标是研究具有极端质量不平衡的原子玻色-费米量子气体混合物中的热化动力学和输运。这种不平衡自然会导致多体系统中时间尺度的非常明显的不均匀性。这种情况已被预测显示出非常缓慢的动力学，奇特的流体动力学行为和准本地化。我们将研究轻费米子的弛豫动力学，这些费米子最初被带出平衡，并被浸入重玻色子的浴池中。首先，我们将实现一个准均匀的设置在一个谐波陷阱类似的弗罗里希极化子的情况下，一定的参数集。然后，我们将继续前进，并加载在一个光学晶格中的原子，以研究由于实际上不动的玻色子实现的动力学约束的准局域化。我们将与研究单位的几个理论合作伙伴密切合作，对这两种情况下观察到的时间尺度进行建模和解释，并了解动力学约束在系统中的作用。