Universal prethermal dynamics of Bose gases quenched to unitarity.
View / Open Files
Authors
Glidden, Jake AP
Lopes, Raphael
Cornell, Eric A
Smith, Robert P
Publication Date
2018-11Journal Title
Nature
ISSN
0028-0836
Publisher
Springer Science and Business Media LLC
Volume
563
Issue
7730
Pages
221-224
Language
eng
Type
Article
Physical Medium
Print-Electronic
Metadata
Show full item recordCitation
Eigen, C., Glidden, J. A., Lopes, R., Cornell, E. A., Smith, R. P., & Hadzibabic, Z. (2018). Universal prethermal dynamics of Bose gases quenched to unitarity.. Nature, 563 (7730), 221-224. https://doi.org/10.1038/s41586-018-0674-1
Abstract
Understanding strongly correlated phases of matter, such as the quark-gluon plasma and neutron stars, and in particular the dynamics of such systems, for example, following a Hamiltonian quench (a sudden change in some Hamiltonian parameter, such as the strength of interparticle interactions) is a fundamental challenge in modern physics. Ultracold atomic gases are excellent quantum simulators for these problems, owing to their tunable interparticle interactions and experimentally resolvable intrinsic timescales. In particular, they provide access to the unitary regime, in which the interactions are as strong as allowed by quantum mechanics. This regime has been extensively studied in Fermi gases1,2. The less-explored unitary Bose gases3-11 offer possibilities12 such as universal physics controlled solely by the gas density13,14 and new forms of superfluidity15-17. Here, through momentum- and time-resolved studies, we explore degenerate and thermal homogeneous Bose gases quenched to unitarity. In degenerate samples, we observe universal post-quench dynamics in agreement with the emergence of a prethermal state18-24 with a universal non-zero condensed fraction22,24. In thermal gases, the dynamic and thermodynamic properties generally depend on the gas density and the temperature, but we find that they can still be expressed in terms of universal dimensionless functions. Surprisingly, we find that the total quench-induced correlation energy is independent of the gas temperature. These measurements provide quantitative benchmarks and challenges for the theory of unitary Bose gases.
Keywords
cond-mat.quant-gas, cond-mat.quant-gas, physics.atom-ph, quant-ph
Relationships
Is supplemented by: https://doi.org/10.17863/CAM.30242
Sponsorship
European Office of Aerospace Research and Development (EOARD) (W911NF-15-1-0444)
Engineering and Physical Sciences Research Council (EP/N011759/1)
European Research Council (682285)
Engineering and Physical Sciences Research Council (EP/P009565/1)
Identifiers
External DOI: https://doi.org/10.1038/s41586-018-0674-1
This record's URL: https://www.repository.cam.ac.uk/handle/1810/286143
Rights
Licence:
http://www.rioxx.net/licenses/all-rights-reserved
Statistics
Total file downloads (since January 2020). For more information on metrics see the
IRUS guide.
Recommended or similar items
The current recommendation prototype on the Apollo Repository will be turned off on 03 February 2023. Although the pilot has been fruitful for both parties, the service provider IKVA is focusing on horizon scanning products and so the recommender service can no longer be supported. We recognise the importance of recommender services in supporting research discovery and are evaluating offerings from other service providers. If you would like to offer feedback on this decision please contact us on: support@repository.cam.ac.uk