Interaction-induced localization of mobile impurities in ultracold systems
arXiv:1310.8524 · doi:10.1038/srep03147
Abstract
The impurities, introduced intentionally or accidentally into certain materials, can significantly modify their characteristics or reveal their intrinsic physical properties, and thus play an important role in solid-state physics. Different from those static impurities in a solid, the impurities realized in cold atomic systems are naturally mobile. Here we propose an effective theory for treating some unique behaviors exhibited by ultracold mobile impurities. Our theory reveals the interaction-induced transition between the extended and localized impurity states, and also explains the essential features obtained from several previous models in a unified way. Based on our theory, we predict many intriguing phenomena in ultracold systems associated with the extended and localized impurities, including the formation of the impurity-molecules and impurity-lattices. We hope this investigation can open up a new avenue for the future studies on ultracold mobile impurities.
16 pages, 4 figures
References in corpus (12)
- Observation of Fermi Polarons in a Tunable Fermi Liquid of Ultracold Atoms
- Metastability and Coherence of Repulsive Polarons in a Strongly Interacting Fermi Mixture
- Attractive and repulsive Fermi polarons in two dimensions
- A trapped single ion inside a Bose-Einstein condensate
- Self-trapping of impurities in Bose-Einstein condensates: Strong attractive and repulsive coupling
- Self-localized impurities embedded in a one dimensional Bose-Einstein condensate and their quantum fluctuations
- Quantum flutter of supersonic particles in one-dimensional quantum liquids
- Single Impurity In Ultracold Fermi Superfluids
- Multi-impurity polarons in a dilute Bose-Einstein condensate
- Bound states of a localized magnetic impurity in a superfluid of paired ultracold fermions
- Self-localization of a small number of Bose particles in a superfluid Fermi system
- Interaction-induced localization of fermionic mobile impurities in a Larkin-Ovchinnikov superfluid