2008/11/30 by D. M. Gangardt, Alex Kamenev, A. Kamenev
Physics and Astronomy · #Bloch oscillations #Bose gas #Bose–Einstein condensate #Boson #Classical mechanics #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Excitation #Fermion #Particle (ecology) #Periodic potential #Physics #Quantum electrodynamics #Quantum many-body systems #Quantum mechanics #Quantum, superfluid, helium dynamics #Spin (aerodynamics) #Spinor #cond-mat.stat-mech
paper · pdf · doi:10.1103/physrevlett.102.070402
published as Phys. Rev. Lett. 102, 070402 (2009) · 4 pages, 2 figures
openalex publication_date 2009/02/18 · arxiv created 2009/03/12 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
A force applied to a spin-flipped particle in a one-dimensional spinor gas may lead to Bloch oscillations of the particle's position and velocity. The existence of Bloch oscillations crucially depends on the viscous friction force exerted by the rest of the gas on the spin excitation. We evaluate the friction in terms of the quantum fluid parameters. In particular, we show that the friction is absent for integrable cases, such as an SU(2) symmetric gas of bosons or fermions. For small deviations from the exact integrability the friction is very weak, opening the possibility to observe Bloch oscillations.