Resonant dynamics of chromium condensates

Abstract

We numerically study the dynamics of a spinor chromium condensate in low magnetic fields. We show that the condensate evolution has a resonant character revealing rich structure of resonances similar to that already discussed in the case of alkali-atoms condensates. This indicates that dipolar resonances occur commonly in the systems of cold atoms. In fact, they have been already observed experimentally. We further simulate two recent experiments with chromium condensates, in which the threshold in spin relaxation and the spontaneous demagnetization phenomena were observed. We demonstrate that both these effects originate in resonant dynamics of chromium condensate.