Non-Galilean response of Rashba coupled Fermi gases
arXiv:1303.2628 · doi:10.1103/PhysRevA.88.053609
Abstract
We consider the effect of a momentum kick on the ground state of a non-interacting two-dimensional Fermi gas subject to Rashba spin-orbit coupling. Although the total momentum is a constant of motion, the gas does not obey the rules of Galilean relativity. Upon imprinting a small overall velocity to the non-interacting gas, we find that the Fermi sea is deformed in a non-trivial way. We also consider a weakly repulsive Fermi gas, and find, from its Hartree shift, that the total ground state of the system may change into a deformed, finite momentum ground state as the repulsion is increased beyond a critical value, without the need of any external Zeeman fields. We also discuss possible experimental signatures of these effects.
6 pages, 1 figure. Published version
References in corpus (18)
- Many-Body Physics with Ultracold Gases
- Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas
- Effect of Induced Spin-Orbit Coupling for Atoms via Laser Fields
- Generalized Rashba spin-orbit coupling for cold atoms
- BCS-BEC crossover induced by a synthetic non-Abelian gauge field
- Measurement of the Homogeneous Contact of a Unitary Fermi gas
- Chiral Rashba spin textures in ultra-cold Fermi gases
- Unconventional superfluid in a two-dimensional Fermi gas with anisotropic spin-orbit coupling and Zeeman fields
- Composite fermion state of spin-orbit coupled bosons
- Route to Observable Fulde-Ferrell-Larkin-Ovchinnikov Phases in 3D Spin-Orbit Coupled Degenerate Fermi Gases
- Supercurrent and dynamical instability of spin-orbit-coupled ultracold Bose gases
- Finite-Momentum Dimer Bound State in Spin-Orbit Coupled Fermi Gas
- Itinerant ferromagnetism in an atomic Fermi gas: Influence of population imbalance
- Inhomogeneous Fulde-Ferrell superfluidity in spin-orbit coupled atomic Fermi gases
- Flow enhanced pairing and other novel effects in Fermi gases in synthetic gauge fields
- Topological superfluid phases of an atomic Fermi gas with in- and out-of-plane Zeeman fields and equal Rashba-Dresselhaus spin-orbit coupling
- Direct observation of the Fermi surface in an ultracold atomic gas
- Single-branch theory of ultracold Fermi gases with artificial Rashba spin-orbit coupling