Comment on "Negative Differential Conductivity in an Interacting Quantum Gas."
Quantum Gases
2016-05-24 v1
Abstract
Labouvie \etal (\prl {\bf 115}, 050601, (20015)) recently demonstrated negative differential conductivity (NDC) in a multi-well Bose-Einstein condensate. They stated "we demonstrate that NDC originates from a nonlinear, atom number dependent tunneling coupling in combination with fast collisional decoherence." We show theoretically how the essential feature of NDC, a reduction in atomic current caused by an increase in chemical potential, is present in unitary dynamics through the well-known mechanism of macroscopic self-trapping (MST), and that the collisional decoherence merely serves as a quantitative modification of this.
Cite
@article{arxiv.1605.06559,
title = {Comment on "Negative Differential Conductivity in an Interacting Quantum Gas."},
author = {M. K. Olsen and J. F. Corney},
journal= {arXiv preprint arXiv:1605.06559},
year = {2016}
}
Comments
Submitted as a comment. A more extensive article is in preparation