|Título||Contact and static structure factor for bosonic and fermionic mixtures
Barfknecht, Rafael Emilio
|Abstract||We study measurable quantities of bosonic and fermionic mixtures on a one-dimensional ring. These few-body ensembles consist of majority atoms obeying certain statistics (Fermi or Bose) and an impurity atom in a different hyperfine state. The repulsive interactions between majority-impurity and majority-majority are varied from weak to strong. We show that the majority-impurity repulsion is mainly responsible for the loss of coherence in the strongly interacting regime. The momentum distribution follows the C/p4 universal behavior for the high-momentum tail, but the contact C is strongly dependent on the strength of the majority-impurity and in a different way on the majority-majority interactions. The static structure factor of the majority atoms exposes a low-momentum peak for strong majority-impurity repulsion, which is attributed to an effective attraction not expected for purely repulsive forces.
|Contido em||Physical review. A, Atomic, molecular, and optical physics. New York. Vol. 91, no. 4 (Apr. 2015), 043640, 8 p.
Sistemas de bósons
Sistemas de férmions pesados
|Tipo||Artigo de periódico
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