2008
DOI: 10.1103/physreva.78.043610
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Effective Lagrangian of unitary Fermi gas fromεexpansion

Abstract: Using expansion technique proposed by Nishida and Son ͓Phys. Rev. Lett. 97, 050403 ͑2006͔͒ we derive an effective Lagrangian ͑Ginzburg-Landau-type functional͒ of the degenerate unitary Fermi gas to the nextto-leading order in . It is demonstrated that for many realistic situations it is sufficient to retain leading order terms in the derivative expansion. The functional is used to study vortex structure in the symmetric gas, and interface between normal and superfluid phases in the polarized gas. Typical vorte… Show more

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Cited by 39 publications
(54 citation statements)
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“…These values suggest that the kaons are condensed and thus that the relevant phase to consider is the CFL-K 0 phase. It has been argued that for sufficiently large values of the parameter m 2 s /µ q the CFL-K 0 phase is modified to the so-called curCFL-K 0 phase which is anisotropic and exhibits counter-propagating currents from the kaon condensate and ungapped fermions [43,44,45]. Because of the presence of ungapped fermions, the transport properties of this phase can be expected to be very different from the ones in the CFL-K 0 phase and similar to unpaired quark matter.…”
Section: A Chiral Lagrangianmentioning
confidence: 99%
“…These values suggest that the kaons are condensed and thus that the relevant phase to consider is the CFL-K 0 phase. It has been argued that for sufficiently large values of the parameter m 2 s /µ q the CFL-K 0 phase is modified to the so-called curCFL-K 0 phase which is anisotropic and exhibits counter-propagating currents from the kaon condensate and ungapped fermions [43,44,45]. Because of the presence of ungapped fermions, the transport properties of this phase can be expected to be very different from the ones in the CFL-K 0 phase and similar to unpaired quark matter.…”
Section: A Chiral Lagrangianmentioning
confidence: 99%
“…Motivated by these results we have examined the stability of the kaon condensed phase against the formation of a non-zero current [92,93]. Consider a spatially varying U (1) Y rotation of the maximal kaon condensate…”
Section: Meson Supercurrent Statementioning
confidence: 99%
“…18. In these plots we have included the contribution of a baryon current  B , as suggested in [93]. In this case we have to minimize the energy with respect to two currents.…”
Section: Meson Supercurrent Statementioning
confidence: 99%
“…The former exhibits a chromomagnetic instability [6,7] while the latter a superfluid density instability [8]. Recent studies have demonstrated that this type of instability is related to the local phase fluctuation of the superconducting order parameter, i.e., the Nambu-Goldstone boson fields [9,10,11,12]. This type of instability induces the formation of the single-planewave FF-like state [13,14,15,16,17].…”
mentioning
confidence: 99%
“…The explicit form of Ω M has been given in Ref. [2] with the Sarma instability [19], 12) in weak coupling, i.e. δµ <<μ.…”
mentioning
confidence: 99%