Phase diagram of a bosonic ladder with two coupled chains

Details Phase diagram of a bosonic ladder with two coupled chains Phase diagram of a bosonic ladder with two coupled chains

2008-02-04

arxiv.org/abs/0802.0396v1

Physics

Condensed Matter

Statistical Mechanics

6 pages, 10 figures

Scientific paper

We study a bosonic ladder with two coupled chains using the finite size density matrix renormalisation group method. We show that in a commensurate bosonic ladder the critical on-site interaction ($U_C$) for the superfluid to Mott insulator transition becomes larger as the inter-chain hopping ($t_\bot$)increases. We analyze this quantum phase transition and obtain the phase diagram in the $t_\bot -U$ plane.

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