Ferroelectric quantum phase transition with cold polar molecules
Quantum Gases
2015-09-02 v1
Abstract
We analyze a system of polar molecules in a one-dimensional optical lattice. By controlling the internal structure of the polar molecules with static electric and microwave fields, we demonstrate the appearance of a quantum phase transition into a ferroelectric phase via spontaneous breaking of a symmetry. The phase diagram is first analyzed within mean-field theory, while in a second step the results are verified by a mapping onto the Bose-Hubbard model for hard-core bosons. The latter is studied within the well-established bosonization procedure. We find that the ferroelectric phase is characterized by (quasi) long-range order for the electric dipole moments.
Cite
@article{arxiv.1412.0521,
title = {Ferroelectric quantum phase transition with cold polar molecules},
author = {Markus Klinsmann and David Peter and Hans Peter Büchler},
journal= {arXiv preprint arXiv:1412.0521},
year = {2015}
}
Comments
8 pages, 3 figures