Landau versus Spin Superfluidity in Spinor Bose-Einstein Condensates
arXiv:1212.5894 · doi:10.1103/PhysRevB.88.184503
Abstract
We consider a spin-1/2 Bose-Einstein condensate prepared initially in a single spin projection. The two channels of excitations existing in such a system (namely density and spin waves) are discussed and we show how pure spin waves can be excited in the presence of local magnetic defects. We analyze the role played by spin excitations on the Landau superfluidity criterion and demonstrate the absence of absolute superfluidity for the antiferromagnetic condensate. In the ferromagnetic case, we identify two critical velocities for the breakdown of superfluidity.
5 pages, 3 figures
References in corpus (7)
- Half-solitons in a polariton quantum fluid behave like magnetic monopoles
- Quantum Phase Transitions and Continuous Observation of Spinor Dynamics in an Antiferromagnetic Condensate
- Spin waves in a one-dimensional spinor Bose gas
- Transmutation from Skyrmions to Half-Solitons Driven by the Nonlinear Optical Spin-Hall Effect
- Topological Wigner Crystal of Half-Solitons in a Spinor BEC
- Long wavelength spin dynamics of ferromagnetic condensates
- Dynamical Structure Factor and Spin-Density Separation for a Weakly-Interacting Two-Component Bose Gas
Cited by in corpus (14)
- On-demand dark soliton train manipulation in a spinor polariton condensate
- Observation of Two Sound Modes in a Binary Superfluid Gas
- Nonlinear waves of polarization in two-component Bose-Einstein condensates
- Superfluidity of pure spin current in ultracold Bose gases
- Superfluidity of Bose-Einstein condensates in ultracold atomic gases
- Spin and mass superfluidity in ferromagnetic spin-1 Bose-Einstein condensate
- Polarization hydrodynamics in a one-dimensional polariton condensate
- Superfluidity and spin superfluidity in spinor Bose gases
- Paramagnetic resonance in spin-polarized disordered Bose-Einstein condensates
- Spin waves in semiconductor microcavities
- Spin conductivity spectrum and spin superfluidity in a binary Bose mixture
- Dynamical friction in ultralight dark matter: Plummer sphere perspective
- Magnetization induced skyrmion dynamics of a spin-orbit-coupled spinor condensate under sinusoidally varying magnetic field
- Critical speed of a binary superfluid of light