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Persistent URL http://purl.org/net/epubs/work/48938
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Record Id 48938
Title Possible critical behavior driven by the confining potential in optical lattices with ultra-cold fermions
Abstract A recent paper [V. L. Campo et al., Phys. Rev. Lett. 99, 240403 (2007)] has proposed a two-parameter scaling method to determine the phase diagram of the fermionic Hubbard model from opticallattice experiments. Motivated by this proposal, we investigate in more detail the behavior of the ground-state energy per site as a function of trap size ($L$) and confining potential ($V(x) = t (x/L)^\alpha$) in the one-dimensional case. Using the BALDA-DFT method, we find signatures of critical behavior as $\alpha \to \infty$.
Organisation ISIS , ISIS-THEORY , STFC
Keywords 37.10.Jk , 71.10.Fd , critical behavior , 71.27.+a , physics , materials , Hubbard model , ultra-cold fermions , confining potential
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Language English (EN)
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Journal Article Physica B 404, no. 19 (2009): 3328-3331. Is in proceedings of: International Conference on Strongly Correlated Electron Systems, 2008 (SCES'08), Rio de Janeiro, 17-22 Aug 2008. doi:10.1016/j.physb.2009.07.089 2009