# Instability of Fulde-Ferrell-Larkin-Ovchinnikov states in atomic Fermi gases in three and two dimensions

@article{Wang2018InstabilityOF, title={Instability of Fulde-Ferrell-Larkin-Ovchinnikov states in atomic Fermi gases in three and two dimensions}, author={Jibiao Wang and Yanming Che and Leifeng Zhang and Qijin Chen}, journal={Physical Review B}, year={2018}, volume={97}, pages={134513} }

The exotic Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) states have been actively searched for experimentally since the mean-field based FFLO theories were put forward half a century ago. Here, we investigate the stability of FFLO states in the presence of pairing fluctuations. We conclude that FFLO superfluids cannot exist in continuum in three and two dimensions, due to their intrinsic instability, associated with infinite quantum degeneracy of the pairs. These results address the absence of…

## 12 Citations

The influence of the dimensionality of the system on the realization of unconventional Fulde-Ferrell-Larkin-Ovchinnikov pairing in ultra-cold Fermi gases.

- Physics, MedicineJournal of physics. Condensed matter : an Institute of Physics journal
- 2017

This work investigates the influence of a dimensional crossover (from one dimension (1D) to two dimensions (2D) or three dimensions (3D)) on the stability of the FFLO state in the spin-imbalanced attractive Hubbard model.

Fulde-Ferrell states in unequally charged Fermi gases

- Physics
- 2020

Atoms with different internal states can exhibit different responses to an artificial magnetic field. An atomic gas mixture of two different components can therefore be interpreted as a mixture of…

Intersubband pairing induced Fulde-Ferrell phase in metallic nanofilms

- PhysicsPhysical Review B
- 2019

We consider a free-standing metallic nanofilm with a predominant intersubband paring which emerges as a result of the confinement in the growth direction. We show that the Fermi wave vector mismatch…

Nonequilibrium strong-coupling theory for a driven-dissipative ultracold Fermi gas in the BCS-BEC crossover region

- Physics
- 2019

We theoretically investigate strong-coupling properties of an ultracold Fermi gas in the BCS-BEC crossover regime in the non-equilibrium steady state, being coupled with two fermion baths. By…

Imbalanced Fermi systems and exotic superconducting phases

- Physics
- 2020

Quantum many body phases, in competition or coexistence has always been a fascinating area of research in condensed matter physics. One of the most widely investigated scenario of phase competition…

New orientations of the Cooper pair momentum in FFLO state for asymmetric D-wave fermion superfluids

- PhysicsModern Physics Letters B
- 2019

The Fulde–Ferrell–Larkin–Ovchinnikov (FFLO) state in asymmetric D-wave fermion superfluids is investigated generally. The angle dependence of the pairing gap (angle-dependent gap) for D-wave is also…

Damping of the Anderson-Bogolyubov mode in Fermi mixtures by spin and mass imbalance

- Physics
- 2019

We study the temporally nonlocal contributions to the gradient expansion of the pair fluctuation propagator for spinand mass-imbalanced Fermi mixtures. These terms are related to the damping…

Polarized fermions in one dimension: Density and polarization from complex Langevin calculations, perturbation theory, and the virial expansion

- PhysicsPhysical Review D
- 2018

We calculate the finite-temperature density and polarization equations of state of one-dimensional fermions with a zero-range interaction, considering both attractive and repulsive regimes. In the…

Strong Fulde-Ferrell Larkin-Ovchinnikov pairing fluctuations in polarized Fermi systems

- PhysicsPhysical Review Research
- 2021

Michele Pini, Pierbiagio Pieri, 3 and G. Calvanese Strinati 4, 5 School of Science and Technology, Physics Division, Università di Camerino, 62032 Camerino (MC), Italy Dipartimento di Fisica e…

Quantum Lifshitz points and fluctuation-induced first-order phase transitions in imbalanced Fermi mixtures

- Physics
- 2020

We perform a detailed analysis of the phase transition between the uniform superfluid and normal phases in spin- and mass-imbalanced Fermi mixtures. At mean-field level we demonstrate that at…

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