Ground-state properties of a one-dimensional strongly interacting Bose-Fermi mixture in a double-well potential

Lelas, Karlo and Jukić, Dario and Buljan, Hrvoje (2009) Ground-state properties of a one-dimensional strongly interacting Bose-Fermi mixture in a double-well potential. Physical Review A, 80 (5). pp. 53617-9. ISSN 1050-2947

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Abstract

We calculate the reduced single-particle density matrix (RSPDM), momentum distribution, natural orbitals and their occupancies, for a strongly repulsive one-dimensional Bose-Fermi mixture in a double-well potential with a large central barrier. We assume that all particles have the same mass, and fermions are spin polarized. For mesoscopic systems, we find that the ground-state properties qualitatively differ for mixtures with even number of particles (both odd-odd and even-even mixtures) in comparison to mixtures with odd particle numbers (odd-even and even-odd mixtures). For even mixtures the momentum distribution is smooth, whereas the momentum distribution of odd mixtures possesses distinct modulations; the differences are observed also in the off-diagonal correlations of the RSPDM, and in the occupancies of natural orbitals. The calculation is based on a formula which enables efficient calculation of the RSPDM for mesoscopic mixtures in various potentials.

Item Type: Article
Keywords: Bose-Fermi mixture, double-well potential, strongly correlated states
Date: November 2009
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2009) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 119-0000000-1015
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 29 May 2014 20:48
Last Modified: 29 May 2014 20:48
URI: http://digre.pmf.unizg.hr/id/eprint/1979

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