Paramagnetic resonance in spin-polarized disordered Bose-Einstein condensates.

ABSTRACT: We study the pseudo-spin density response of a disordered two-dimensional spin-polarized Bose gas to weak alternating magnetic field, assuming that one of the spin states of the doublet is macroscopically occupied and Bose-condensed while the occupation of the other state remains much smaller. We calculate spatial and temporal dispersions of spin susceptibility of the gas taking into account spin-flip processes due to the transverse-longitudinal splitting, considering microcavity exciton polaritons as a testbed. Further, we use the Bogoliubov theory of weakly-interacting gases and show that the time-dependent magnetic field power absorption exhibits double resonance structure corresponding to two particle spin states (contrast to paramagnetic resonance in regular spin-polarized electron ga

SUBMITTER: Kovalev VM 

PROVIDER: S-EPMC5437097 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature