Complex and real unconventional Bose-Einstein condensations in high orbital bands
Quantum Gases
2015-03-19 v3 Other Condensed Matter
Abstract
We perform the theoretical study on the unconventional Bose-Einstein condensations (UBEC) in the high bands of optical lattices observed by Hemmerich's group. These exotic states are characterized by complex-valued condensate wavefunctions with nodal points, or real-valued ones with nodal lines, thus are beyond the {\it "no-node"} paradigm of the conventional BECs. A quantum phase transition is driven by the competition between the single particle band and interaction energies. The complex UBECs spontaneously break time-reversal symmetry, exhibiting a vortex-antivortex lattice structure.
Cite
@article{arxiv.1106.1121,
title = {Complex and real unconventional Bose-Einstein condensations in high orbital bands},
author = {Zi Cai and Congjun Wu},
journal= {arXiv preprint arXiv:1106.1121},
year = {2015}
}
Comments
4.2 pages