Can Three-Body Recombination Purify a Quantum Gas?

Author
Abstract
Three-body recombination in quantum gases is traditionally associated with heating, but it was recently found that it can also cool the gas. We show that in a partially condensed three-dimensional homogeneous Bose gas three-body loss could even purify the sample, that is, reduce the entropy per particle and increase the condensed fraction η. We predict that the evolution of η under continuous three-body loss can, depending on small changes in the initial conditions, exhibit two qualitatively different behaviors--if it is initially above a certain critical value, η, increases further, whereas clouds with lower initial η evolve towards a thermal gas. These dynamical effects should be observable under realistic experimental conditions.
Year of Publication
2019
Journal
Physical Review Letters
Volume
123
Date Published
2019-07
ISSN Number
0031-9007
URL
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.123.020405
DOI
10.1103/PhysRevLett.123.020405
JILA PI
Journal Article