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Contact and static structure factor for bosonic and fermionic mixtures

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Contact and static structure factor for bosonic and fermionic mixtures

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Título Contact and static structure factor for bosonic and fermionic mixtures
Autor Barfknecht, Rafael Emilio
Brouzos, Ioannis
Foerster, Angela
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.
Assunto Sistemas de bósons
Sistemas de férmions pesados
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/118050
Arquivos Descrição Formato
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