Induced interactions and the superfluid transition temperature in a three-Component fermi gas

J.-P. Martikainen; J. J. Kinnunen; P. Törmä; C. J. Pethick

doi:10.1103/PhysRevLett.103.260403

Induced interactions and the superfluid transition temperature in a three-Component fermi gas

J.-P. Martikainen^*, J. J. Kinnunen, P. Törmä, C. J. Pethick

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

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Abstract

We study many-body contributions to the effective interaction between fermions in a three-component Fermi mixture. We find that effective interactions induced by the third component can lead to a phase diagram different from that predicted if interactions with the third component are neglected. As a result, in a confining potential a superfluid shell structure can arise even for equal populations of the components. We also find a critical temperature for the BCS transition in a Li6 mixture which can deviate strongly from the one in a weakly interacting two-component system.

Original language	English
Article number	260403
Pages (from-to)	1-4
Number of pages	4
Journal	Physical Review Letters
Volume	103
Issue number	26
DOIs	https://doi.org/10.1103/PhysRevLett.103.260403 https://doi.org/10.1103/PhysRevLett.103.260403
Publication status	Published - 2009
MoE publication type	A1 Journal article-refereed

Keywords

fermi gases
induced interactions
quantum gases
superfluidity

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abstract = "We study many-body contributions to the effective interaction between fermions in a three-component Fermi mixture. We find that effective interactions induced by the third component can lead to a phase diagram different from that predicted if interactions with the third component are neglected. As a result, in a confining potential a superfluid shell structure can arise even for equal populations of the components. We also find a critical temperature for the BCS transition in a Li6 mixture which can deviate strongly from the one in a weakly interacting two-component system.",

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