Can Three-Body Recombination Purify a Quantum Gas?
Dogra, Lena H
Cornell, Eric A
Smith, Robert P
Physical review letters
American Physical Society
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Dogra, L. H., Glidden, J., Hilker, T., Eigen, C., Cornell, E. A., Smith, R. P., & Hadzibabic, Z. (2019). Can Three-Body Recombination Purify a Quantum Gas?. Physical review letters, 123 (2), 020405. https://doi.org/10.1103/physrevlett.123.020405
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 $\eta$. We predict that the evolution of $\eta$ under continuous three-body loss can, depending on small changes in the initial conditions, exhibit two qualitatively different behaviours - if it is initially above a certain critical value, $\eta$ increases further, whereas clouds with lower initial $\eta$ evolve towards a thermal gas. These dynamical effects should be observable under realistic experimental conditions.
European Office of Aerospace Research and Development (EOARD) (W911NF-15-1-0444)
ECH2020 EUROPEAN RESEARCH COUNCIL (ERC) (682285)
EPSRC (via University of Strathclyde) (EP/P009565/1)
External DOI: https://doi.org/10.1103/physrevlett.123.020405
This record's URL: https://www.repository.cam.ac.uk/handle/1810/294049
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