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Nonlocal Quantum Fluctuations and Fermionic Superfluidity in the Imbalanced Attractive Hubbard Model

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Journal 30 Oct 2014Embargo end date: 01 Jan 2014 Finland Publisher:American Physical Society (APS)Journal:Physical Review Letters, volume 113 (issn: 0031-9007, eissn: 1079-7114,

Copyright policy )Funded by:SNSF | Simulation of Correlated ..., AKA | Design and engineering of..., EC | CODE +4 projects

Authors: Heikkinen, M. O J; Kim, D. H.; Troyer, M.; Törmä; P.;

doi: 10.1103/physrevlett.113.185301 , 10.48550/arxiv.1402.6939

pmid: 25396376

arXiv: http://arxiv.org/abs/1402.6939 , 1402.6939

Nonlocal Quantum Fluctuations and Fermionic Superfluidity in the Imbalanced Attractive Hubbard Model

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Abstract

We study fermionic superfluidity in strongly anisotropic optical lattices with attractive interactions utilizing the cluster DMFT method, and focusing in particular on the role of non-local quantum fluctuations. We show that non-local quantum fluctuations impact the BCS superfluid transition dramatically. Moreover, we show that exotic superfluid states with delicate order parameter structure, such as the Fulde-Ferrell-Larkin-Ovchinnikov phase driven by spin population imbalance, can emerge even in the presence of such strong fluctuations.

5 pages, 3 figures

Country

Finland

Related Organizations

Aalto University
Finland
Gwangju Institute of Science and Technology
Korea (Republic of)
AALTO-KORKEAKOULUSAATIO
Finland
ETH Zurich
Switzerland
University of Zurich
Switzerland

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Keywords

ta214, Hubbard model, ta114, Strongly Correlated Electrons (cond-mat.str-el), Condensed Matter - Superconductivity, ta221, FOS: Physical sciences, Physics and Astronomy(all), Superconductivity (cond-mat.supr-con), Condensed Matter - Strongly Correlated Electrons, superfluidity, Quantum Gases (cond-mat.quant-gas), quantum gases, Condensed Matter - Quantum Gases, ta218, cluster DMFT

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