Superfluid and Mott Insulator phases of one-dimensional Bose-Fermi mixtures
| Autor: | Valery Rousseau, Richard T. Scalettar, P. J. H. Denteneer, A. Baldwin, Aleksander Zujev, Marcos Rigol |
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| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
Physics
Condensed Matter::Quantum Gases Condensed matter physics Statistical Mechanics (cond-mat.stat-mech) Mott insulator Quantum Monte Carlo FOS: Physical sciences Fermion Bose–Hubbard model 01 natural sciences Atomic and Molecular Physics and Optics 3. Good health 010305 fluids & plasmas Superfluidity Quantum mechanics 0103 physical sciences 010306 general physics Ground state Condensed Matter - Statistical Mechanics Phase diagram Boson |
| Zdroj: | Physical Review A, 78(3), 033619 |
| Popis: | We study the ground state phases of Bose-Fermi mixtures in one-dimensional optical lattices with quantum Monte Carlo simulations using the Canonical Worm algorithm. Depending on the filling of bosons and fermions, and the on-site intra- and inter-species interaction, different kinds of incompressible and superfluid phases appear. On the compressible side, correlations between bosons and fermions can lead to a distinctive behavior of the bosonic superfluid density and the fermionic stiffness, as well as of the equal-time Green functions, which allow one to identify regions where the two species exhibit anticorrelated flow. We present here complete phase diagrams for these systems at different fillings and as a function of the interaction parameters. 8 pages, 12 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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