Thermal spin fluctuations in spinor Bose-Einstein condensates
arXiv:1301.3406 · doi:10.1103/PhysRevA.87.033632
Abstract
We study the thermal activation of spin fluctuations in dynamically-stable spinor Bose-Einstein condensates. We analyze the specific cases of a non-dipolar spin-1 condensate in m = 0, where thermal activation results from spin-changing collisions, and of a Chromium condensate in the maximally stretched state m = -3, where thermal spin fluctuations are due to dipole-induced spin- relaxation. In both cases, we show that the low energy associated to the spinor physics may be employed for thermometry purposes down to extremely low temperatures, typically impossible to measure in BECs with usual thermometric techniques. Moreover, the peculiar dependence of the system's entropy with the applied Zeeman energy opens a possible route for adiabatic cooling.
6 pages, 4 figures
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Cited by in corpus (6)
- Dipolar physics: A review of experiments with magnetic quantum gases
- Emergence and scaling of spin turbulence in quenched antiferromagnetic spinor Bose-Einstein condensates
- Sensitivity to thermal noise of atomic Einstein-Podolsky-Rosen entanglement
- Cooling of a Bose-Einstein Condensate by spin distillation
- Ground-states of spin-1 bosons in asymmetric double-wells
- Crossover from weak to strong quench in a spinor Bose-Einstein condensate