Superfluid Properties of a Spin-orbit Coupled Bose Gas: Finite Temperature Effects and Hydrodynamic Theory

Dr Zhang, Shizhong   (Principal Investigator (PI))

24

2017-08-20

314900

Superfluid Properties of a Spin-orbit Coupled Bose Gas: Finite Temperature Effects and Hydrodynamic Theory

Landau hydrodynamic theory, second sound, spin-orbit coupling, superfluid and normal density

Physics

Physical Sciences (P)

17305217

General Research Fund (GRF)

2017

Completed

1 We will investigate the finite temperature effects on the normal density of a spin-orbit coupled Bose gas. Contributions from the single and multiple quasi-particle will be discussed explicitly. Corrections to Landau formula for the normal density will be derived. 2 We will discuss the lifetime of long wave length phonons due to phonon scattering. Effects of gapped spin excitations in the phonon lifetime will be discussed. 3 We will try to extend the Landau two fluid model to include the effects of spin-orbit coupling of the type that is realized in experiments. Investigation will be made to determine if any novel hydrodynamic mode will be present due to spin-orbit coupling.