Phase diagram of two-dimensional fast-rotating ultracold fermionic atoms near unitarity

Nikolić, Predrag

doi:10.1103/physreva.81.023601

Cited by 2 publications

(1 citation statement)

References 46 publications

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“…An effect of rotation on the FFLO state has been studied in the context of cold Fermi gases [27][28][29] as well as in mesoscopic superconductors where the magnetic field plays an equivalent role to the rotation [28,30,31]. It has been shown that the nucleation of vortex in the FFLO superfluid gives rise to intriguing phenomena.…”

Section: Introductionmentioning

confidence: 99%

Rotating Fulde-Ferrell-Larkin-Ovchinnikov state in cold Fermi gases

Yoshida

Yanase

2011

Phys. Rev. A

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We study an effect of rotation on the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state of two component Fermi superfluid gases in a toroidal trap. We investigate a stability of the FFLO states in the quasi-one-dimensional regime on the basis of the Bogoliubov-de Gennes equation. We find that two novel FFLO phases, i.e., the half quantum vortex state and the intermediate state of FuldeFerrell (FF) state and Larkin-Ovchinnikov (LO) state, are stabilized by the rotation. The phase diagram for the FF state, LO state, intermediate state, and half quantum vortex state is shown in both T -P plane and T -h plane. We demonstrate characteristic features of these states, such as the order parameter, flux quantization, and local polarization. Several related works are discussed, and the advantages of cold Fermi gases are indicated.

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Section: Introductionmentioning

confidence: 99%

Rotating Fulde-Ferrell-Larkin-Ovchinnikov state in cold Fermi gases

Yoshida

Yanase

2011

Phys. Rev. A

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Vortices and vortex states in Rashba spin-orbit-coupled condensates

Nikolić¹

2014

Phys. Rev. A

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The Rashba spin-orbit coupling is equivalent to the finite Yang-Mills flux of a static SU(2) gauge field. It gives rise to the protected edge states in two-dimensional topological band-insulators, much like magnetic field yields the integer quantum Hall effect. An outstanding question is which collective topological behaviors of interacting particles are made possible by the Rashba spin-orbit coupling. Here we addresses one aspect of this question by exploring the Rashba SU(2) analogues of vortices in superconductors. Using the Landau-Ginzburg approach and conservation laws, we classify the prominent two-dimensional condensates of two- and three-component spin-orbit-coupled bosons, and characterize their vortex excitations. There are two prominent types of condensates that take advantage of the Rashba spin-orbit coupling. Their vortices exist in multiple flavors whose number is determined by the spin representation, and interact among themselves through logarithmic or linear potentials as a function of distance. The vortices that interact linearly exhibit confinement and asymptotic freedom similar to quarks in quantum chromodynamics. One of the two condensate types supports small metastable neutral quadruplets of vortices, and their tiles as metastable vortex lattices. Quantum melting of such vortex lattices could give rise to non-Abelian fractional topological insulators, SU(2) analogues of fractional quantum Hall states. The physical systems in which these states could exist are trapped two- and three-component bosonic ultra-cold atoms subjected to artificial gauge fields, as well as solid-state quantum wells made either from Kondo insulators such as SmB$_6$ or conventional topological insulators interfaced with conventional superconductors.Comment: 20 pages, 8 figure

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Phase diagram of two-dimensional fast-rotating ultracold fermionic atoms near unitarity

Cited by 2 publications

References 46 publications

Rotating Fulde-Ferrell-Larkin-Ovchinnikov state in cold Fermi gases

Rotating Fulde-Ferrell-Larkin-Ovchinnikov state in cold Fermi gases

Vortices and vortex states in Rashba spin-orbit-coupled condensates

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