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Quantum phase transition in Bose-Fermi mixtures
Universität Heidelberg, DEU.
Universität Heidelberg, DEU ; CERN, CHE.
Universität Heidelberg, DEU.ORCID iD: 0000-0002-4615-2507
Universität Heidelberg, DEU.
2011 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 84, no 3Article in journal (Refereed) Published
Abstract [en]

We study a quantum Bose-Fermi mixture near a broad Feshbach resonance at zero temperature. Within a quantum field theoretical model, a two-step Gaussian approximation allows us to capture the main features of the quantum phase diagram. We show that a repulsive boson-boson interaction is necessary for thermodynamic stability. The quantum phase diagram is mapped in chemical-potential and density space, and both first- and second-order quantum phase transitions are found. We discuss typical characteristics of the first-order transition, such as hysteresis or a droplet formation of the condensate, which may be searched for experimentally.

Place, publisher, year, edition, pages
American Physical Society, 2011. Vol. 84, no 3
National Category
Condensed Matter Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:kau:diva-87186DOI: 10.1103/PhysRevA.84.033629ISI: 000295161500004OAI: oai:DiVA.org:kau-87186DiVA, id: diva2:1624826
Available from: 2022-01-05 Created: 2022-01-05 Last updated: 2023-06-20Bibliographically approved

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Moroz, Sergej

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