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Bose-Hubbard Model at Finite Temperature

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Decoupling<br />

Ans<strong>at</strong>z in<br />

site-basis<br />

with<br />

consistent mean-field theory<br />

Mean field Hamiltonian<br />

Diagonaliz<strong>at</strong>ion in site-basis<br />

Perturb<strong>at</strong>ion Theory<br />

0<br />

0<br />

K. Sheshardi et al., EPL 22, 257 (1993)<br />

van Oosten et al., PRA 63, 053601 (2001)

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