Quantum Melting and Absence of Bose-Einstein Condensation in Two-Dimensional Vortex Matter
Condensed Matter
2009-11-07 v2
Abstract
We demonstrate that quantum fluctuations suppress Bose-Einstein condensation of quasi-two-dimensional bosons in a rapidly-rotating trap. Our conclusions rest in part on an effective-Lagrangian description of the triangular vortex lattice, and in part on microscopic Bogoliubov equations in the rapid-rotation limit. We obtain analytic expressions for the collective-excitation dispersion, which, in a rotating system, is quadratic rather than linear. Our estimates for the boson filling factor at which the vortex lattice melts at zero temperature due to quantum fluctuations are consistent with recent exact-diagonalization calculations.
Keywords
Cite
@article{arxiv.cond-mat/0201020,
title = {Quantum Melting and Absence of Bose-Einstein Condensation in Two-Dimensional Vortex Matter},
author = {Jairo Sinova and C. B. Hanna and A. H. MacDonald},
journal= {arXiv preprint arXiv:cond-mat/0201020},
year = {2009}
}
Comments
4 pages, 1 figures, version to appear in Phys. Rev. Lett