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First-principles quantum dynamics for fermions: Application to molecular dissociation
ARC Centre of Excellence for Quantum-Atom Optics, School of Mathematics and Physics, University of Queensland, Brisbane, Australia.ORCID iD: 0000-0002-2630-7479
ARC Centre of Excellence for Quantum-Atom Optics, School of Mathematics and Physics, University of Queensland, Brisbane, Australia.
ARC Centre of Excellence for Quantum-Atom Optics, School of Mathematics and Physics, University of Queensland, Brisbane, Australia.
2010 (English)In: Europhysics letters, ISSN 0295-5075, E-ISSN 1286-4854, Vol. 92, no 3, article id 36003Article in journal (Refereed) Published
Abstract [en]

We demonstrate that the quantum dynamics of a many-body Fermi-Bose system can be simulated using a Gaussian phase-space representation method. In particular, we consider the application of the mixed fermion-boson model to ultracold quantum gases and simulate the dynamics of dissociation of a Bose-Einstein condensate of bosonic dimers into pairs of fermionic atoms. We quantify deviations of atom-atom pair correlations from Wick's factorization scheme, and show that atom-molecule and molecule-molecule correlations grow with time, in clear departures from pairing mean-field theories. As a first-principles approach, the method provides benchmarking of approximate approaches and can be used to validate dynamical probes for characterizing strongly correlated phases of fermionic systems.

Place, publisher, year, edition, pages
European Physical Society , 2010. Vol. 92, no 3, article id 36003
National Category
Condensed Matter Physics Atom and Molecular Physics and Optics Computational Mathematics
Identifiers
URN: urn:nbn:se:oru:diva-65563DOI: 10.1209/0295-5075/92/36003ISI: 000284996700024Scopus ID: 2-s2.0-79955935790OAI: oai:DiVA.org:oru-65563DiVA, id: diva2:1188582
Note

Funding Agency:

Australian Research Council

Available from: 2018-03-07 Created: 2018-03-07 Last updated: 2018-03-14Bibliographically approved

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Ögren, Magnus

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  • Other locale
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