Rotational bosonic current in a quasi-condensate confined in an optical toroidal trap
arXiv:cond-mat/0311653 · doi:10.1088/0953-4075/37/22/001
Abstract
We investigate the possibility of inducing a bosonic current which is rotational in a pseudo 1D quasi-condensate confined in an optical toroidal trap. The stability of such a current is also analyzed using hydrodynamics approach. We find that such a current is uniform when the circular symmetry is preserved and energetically stable when the modes of elementary excitations are restricted to one dimension. This scheme allows to distinguish between a quasi and a true condensate by measuring the rotational spectra of the sample.
10 pages, 3 figures