Trionic and quartetting phases in one-dimensional multicomponent ultracold fermions
Trionic and quartetting phases in one-dimensional multicomponent ultracold fermions
复制标题
一维多组分超冷费米子中的三重相和四重相
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
S. White
中科院分区：
文献类型：
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作者：
P. Lecheminant;P. Azaria;E. Boulat;S. Capponi;G. Roux;S. White
我们调查的可能形成的分子凝聚，这可能是，例如，类似物的α凝聚的核物理，在多组分冷原子费米子系统的背景下。本文用低能和数值方法研究了一维光晶格中N分量费米子与接触相互作用的简单范式模型。对于吸引相互作用，准长程分子超流相，由N费米子的束缚态形成，在低密度下出现。我们表明，三阶和四阶相位，分别为N = 3，4，扩展在一个大的域的相图，并对小的破坏性扰动是强大的。
We investigate the possible formation of a molecular condensate, which might be, for instance, the analogue of the alpha condensate of nuclear physics, in the context of multicomponent cold atoms fermionic systems. A simple paradigmatic model of N-component fermions with contact interactions loaded into a one-dimensional optical lattice is studied by means of low-energy and numerical approaches. For attractive interaction, a quasi-long-range molecular superfluid phase, formed from bound-states made of N fermions, emerges at low density. We show that trionic and quartetting phases, respectively for N = 3,4, extend in a large domain of the phase diagram and are robust against small symmetry-breaking perturbations.