Intrinsic self-rotation of BEC Bloch wave packets
Condensed Matter
2016-08-31 v1
Abstract
The semiclassical theory of Bloch wave packet dynamics predicts a self-rotation angular momentum in asymmetric periodic potentials, which has never been observed. We show how this is manifested in Bose-Einstein condensed atoms in optical lattices. Displacing the wave packet to a corner of the Brillouin zone we obtain a current distribution with a non-quantized angular momentum, independent of the size of the distribution. A weak interatomic interaction does not modify the results, affecting only the rate of spreading in the lattice. A strong repulsive interaction results in a collapse of the wavefunction into matter-wave lattice solitons.
Cite
@article{arxiv.cond-mat/0306184,
title = {Intrinsic self-rotation of BEC Bloch wave packets},
author = {Roberto B. Diener and Artem M. Dudarev and Ganesh Sundaram and Qian Niu},
journal= {arXiv preprint arXiv:cond-mat/0306184},
year = {2016}
}