In current cold-atoms physics it is possible to arrange different species of bosonic or fermionic particles that move in optical lattices with different hopping amplitudes. Unlike in solid-state systems, it is even possible to reach the limit of attractive Hubbard interaction. Here we consider the one-dimensional asymmetric fermionic Hubbard model and present numerical results obtained by means of the DMRG method. In particular we discuss the relevant correlation functions and the phase diagram parametrised by the hopping amplitudes asymmetry factor and by the on-site Hubbard interaction.
Numerical Study of the 1D Asymmetric Hubbard Model
C Degli Esposti Boschi;
2008
Abstract
In current cold-atoms physics it is possible to arrange different species of bosonic or fermionic particles that move in optical lattices with different hopping amplitudes. Unlike in solid-state systems, it is even possible to reach the limit of attractive Hubbard interaction. Here we consider the one-dimensional asymmetric fermionic Hubbard model and present numerical results obtained by means of the DMRG method. In particular we discuss the relevant correlation functions and the phase diagram parametrised by the hopping amplitudes asymmetry factor and by the on-site Hubbard interaction.File in questo prodotto:
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