Counterflow superfluid of polaron pairs in Bose-Fermi mixtures in optical lattices

被引：7
|
作者：
Danshita, Ippei [1 ]
Mathey, L. [2 ,3 ]
机构：
[1] RIKEN, Computat Condensed Matter Phys Lab, Wako, Saitama 3510198, Japan
[2] Univ Hamburg, Zentrum Opt Quantentechnol, D-22761 Hamburg, Germany
[3] Univ Hamburg, Inst Laserphys, D-22761 Hamburg, Germany
来源：
PHYSICAL REVIEW A | 2013年 / 87卷 / 02期
关键词：
PHASES;
D O I：
10.1103/PhysRevA.87.021603
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We study the quantum phases of one-dimensional Bose-Fermi mixtures in optical lattices. Assuming repulsive interparticle interactions, equal mass, and unit total filling, we calculate the ground-state phase diagram by means of both the Tomonaga-Luttinger liquid theory and time-evolving block decimation method. We demonstrate the existence of a counterflow superfluid phase of polaron pairs, which are composite particles consisting of two fermions and two bosonic holes, in a broad range of the parameter space. We find that this phase naturally emerges in Yb-174-Yb-173 mixtures, realized in recent experiments, at low temperatures. DOI: 10.1103/PhysRevA.87.021603
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页数：5
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