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Bose-Hubbard Model at Finite Temperature

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St<strong>at</strong>us Quo<br />

T/J<br />

NL<br />

Decoupling<br />

Reentrant<br />

classical field effect<br />

(zero M<strong>at</strong>subara mode)<br />

H.Kleinert, S.Schmidt, A.Pelster,<br />

PRL 93, 160402 (2004)<br />

“From Below”<br />

Bogoliubov<br />

SF<br />

MI<br />

Strong-Coupling<br />

“From Above”<br />

U/J<br />

Monte-Carlo D<strong>at</strong>a<br />

B. Capogrosso-Sansone, N. V. Prokofev, B. V. Svistunov, PRB 75, 134302 (2007)

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