Spin Localization of a Fermi Polaron in a Quasirandom Optical Lattice

Abstract

Recently, the topics of many-body localization (MBL) and one-dimensional strongly interacting few-body systems have received a lot of interest. These two topics have been largely developed separately. However, the generality of the latter as far as external potentials are concerned -- including random and quasirandom potentials -- and their shared spatial dimensionality, makes it an interesting way of dealing with MBL in the strongly interacting regime. Utilising tools developed for few-body systems we look to gain insight into the localization properties of the spin in a Fermi gas with strong interactions. We observe a delocalized--localized transition over a range of fillings of a quasirandom lattice. We find this transition to be of a different nature for low and high fillings, due to the diluteness of the system for low fillings.

arXiv comment6 pages, 3 figures

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Cited by in corpus (6)

• Universal many-body response of heavy impurities coupled to a Fermi sea
• Few-body Bose gases in low dimensions -- a laboratory for quantum dynamics
• Spin subdiffusion in disordered Hubbard chain
• Mean-field phases of an ultracold gas in a quasicrystalline potential
• The Mean-Field Bose Glass in Quasicrystalline Systems
• Mobile Spin Impurity in an Optical Lattice