One-dimensional Fermi polaron in a combined harmonic and periodic potential

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Abstract

We study an impurity in a one-dimensional potential consisting of a harmonic part and a periodic part using both the time-evolving block decimation (TEBD) algorithm and a variational ansatz. Attractive and repulsive contact interactions with a sea of fermions are considered. We find excellent agreement between TEBD and variational results and use the variational ansatz to investigate higher lattice bands. We conclude that the lowest band approximation fails at sufficiently strong interactions and develop a method for computing the Tan contact parameter.

Details

Original languageEnglish
Article number053621
Pages (from-to)1-6
Number of pages6
JournalPhysical Review A
Volume89
Issue number5
Publication statusPublished - May 2014
MoE publication typeA1 Journal article-refereed

    Research areas

  • Hubbard model, impurities, Tan contact, tight-binding approximation, ultracold gases

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