Dynamics of spin-polarized impurity in ultracold Fermi gas
Piotr Magierski, Buğra Tüzemen, Gabriel Wlazłowski
Abstract
We show that the motion of spin-polarized impurity (ferron) in ultracold atomic gas is characterized by a certain critical velocity which can be traced back to the amount of spin imbalance inside the impurity. We have calculated the effective mass of ferron in two dimensions. We show that the effective mass scales with the surface of the ferron. We discuss the impact of these findings; in particular, we demonstrate that ferrons become unstable in the vicinity of a vortex.
Topics & Concepts
ImpuritySpin (aerodynamics)Condensed matter physicsPhysicsVortexFermi gasEffective mass (spring–mass system)Dynamics (music)Atomic physicsUltracold atomQuantumQuantum mechanicsElectronThermodynamicsAcousticsCold Atom Physics and Bose-Einstein CondensatesQuantum, superfluid, helium dynamicsAtomic and Subatomic Physics Research