Quantum phase transitions in a dimerized Bose-Hubbard model: a DMRG study

Kundu, Anasuya ; Pati, Swapan K. (2009) Quantum phase transitions in a dimerized Bose-Hubbard model: a DMRG study EPL: Europhysics Letters, 85 (4). 43001_1-43001_5. ISSN 0295-5075

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Official URL: http://iopscience.iop.org/0295-5075/85/4/43001

Related URL: http://dx.doi.org/10.1209/0295-5075/85/43001

Abstract

We investigate the phase diagram of a dimerized Bose-Hubbard model, using a density matrix renormalization group technique. We find a new phase, which is the coexistence of superfluid and bond-wave phases, due to the effect of dimerization. Experimentally dimerization in optical lattice can be realized by using two counterpropagating laser beams of different wavelengths. Apart from the conventional superfluid-to-Mott-insulator transition, we find a new quantum phase transition: from superfluid-bond-wave to Mott-insulator-bond wave phase. Our study suggests a rich phase diagram which can be easily probed.

Item Type:Article
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ID Code:60846
Deposited On:12 Sep 2011 07:22
Last Modified:18 May 2016 10:47

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