Time crystals: can diamagnetic currents drive a charge density wave into rotation?
Quantum Physics
2015-06-16 v1 Other Condensed Matter
Quantum Gases
Abstract
It has been argued recently that an inhomogeneous system could rotate spontaneously in its ground state - hence a 'time crystal' which is periodic in time. In this note we present a very simple example: a superfluid ring threaded by a magnetic field which develops a charge density wave (CDW). A naive calculation shows that diamagnetic currents cannot drive rotation of the CDW, with a clear picture of the cancellation mechanism.
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Cite
@article{arxiv.1306.6229,
title = {Time crystals: can diamagnetic currents drive a charge density wave into rotation?},
author = {Philippe Nozières},
journal= {arXiv preprint arXiv:1306.6229},
year = {2015}
}
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5 pages