Concomitant Modulated Superfluidity In Polarized Fermionic Gases

Abstract

Recent groundbreaking experiments studying the effects of spin polarization on pairing in unitary Fermi gases encountered mutual qualitative and quantitative discrepancies which seem to be a function of the confining geometry. Using novel numerical algorithms we study the solution space for a 3-dimensional fully self-consistent formulation of realistic systems with up to $10^5$ atoms. A study of the three types of solutions obtained demonstrates a tendency towards metastability as the confining geometry is elongated. One of these solutions, which is consistent with Rice experiments at high trap aspect ratio, supports a state strikingly similar to the long sought Fulde-Ferrel-Larkin-Ovchinnikov state. Our study helps to resolve the long-standing controversy concerning the discrepancies between the findings from two different experimental groups and highlights the versatility of actual-size numerical calculations for investigating inhomogeneous fermionic superfluids.

References in corpus (8)

• Direct Observation of the Superfluid Phase Transition in Ultracold Fermi Gases
• Deformation of a Trapped Fermi Gas with Unequal Spin Populations
• A Unitary Fermi Supersolid: The Larkin-Ovchinnikov Phase
• Surface Tension in Unitary Fermi Gases with Population Imbalance
• Larkin-Ovchinnikov state in resonant Fermi gas
• Renormalization Group Theory for the Imbalanced Fermi Gas
• Mean field thermodynamics of a spin-polarized spherically trapped Fermi gas at unitarity
• Breakdown of the local density approximation in interacting systems of cold fermions in strongly anisotropic traps

Cited by in corpus (2)

• Single Impurity In Ultracold Fermi Superfluids
• Bogoliubov-de Gennes study of trapped spin-imbalanced unitary Fermi gases