Quantum density anomaly in optically trapped ultracold gases
Quantum Gases
2020-09-30 v1
Abstract
We show that the Bose-Hubbard Model exhibits an increase in density with temperature at fixed pressure in the regular fluid regime and in the superfluid phase. The anomaly at the Bose-Einstein condensate is the first density anomaly observed in a quantum state. We propose that the mechanism underlying both the normal phase and the superfluid phase anomalies is related to zero point entropies and ground state phase transitions. A connection with the typical experimental scales and setups is also addressed. This key finding opens a new pathway for theoretical and experimental studies of water-like anomalies in the area of ultracold quantum gases.
Cite
@article{arxiv.1904.10868,
title = {Quantum density anomaly in optically trapped ultracold gases},
author = {Eduardo O. Rizzatti and Marco Aurelio A. Barbosa and Marcia C. Barbosa},
journal= {arXiv preprint arXiv:1904.10868},
year = {2020}
}