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arXiv:1409.1835 · The European Physical Journal Special Topics

Optimal scaling of persistent currents for interacting bosons on a ring

Marco Cominotti, Matteo Rizzi, Davide Rossini, Davit Aghamalyan, Luigi Amico A, L. C. Kwek, F. W. J. Hekking, Anna Minguzzi

Published Apr 1, 2015• 11 citations
arXivHTMLPDF
DOI
10.1140/epjst/e2015-02381-3

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Persistent current of a Bose–Fermi mixture confined in a ring geometry threaded by a synthesized magnetic field is theoretically investigated. Numerical simulations are performed to study the role of boson–boson interactions and that of boson–fermion interactions on the transport property. The result shows that the boson–fermion interactions enhance the phase stiffness, which is a measure of the magnitude of the persistent current, more for the bosons than for the fermions. The same behavior is verified by a renormalization group calculation. The difference in the stiffness enhancement can be attributed to the difference in the localization property of the bosons and the fermions in one dimension.