EconPapers    
Economics at your fingertips  
 

Superfluidity of the Bose-Hubbard model: su (1,1) linearization scheme

Luigi Amico, Mario Rasetti and Riccardo Zecchina

Physica A: Statistical Mechanics and its Applications, 1996, vol. 230, issue 1, 300-312

Abstract: Statistical mechanics of the bosonic Hubbard model is studied in the frame of an improved linearization scheme, applied in such a way so as to approximate in thermodynamically self-consistent way the local interaction and keeping all long-range correlations exact in the linearized form. The hamiltonian spectrum can be obtained due to the resulting dynamical symmetry, and the self-consistent free energy allows us to obtain the temperature dependence of the diagonal and off-diagonal order parameters. The phase diagram exhibits a superfluid condesate phase possibly co-existing, for appropriate values of (U/t)ν, with a fluctuation-mediated off-diagonal long-range-ordered phase. The corresponding transition can be thought of as a conductor-insulator transition.

Date: 1996
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/0378437196000398
Full text for ScienceDirect subscribers only. Journal offers the option of making the article available online on Science direct for a fee of $3,000

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:230:y:1996:i:1:p:300-312

DOI: 10.1016/0378-4371(96)00039-8

Access Statistics for this article

Physica A: Statistical Mechanics and its Applications is currently edited by K. A. Dawson, J. O. Indekeu, H.E. Stanley and C. Tsallis

More articles in Physica A: Statistical Mechanics and its Applications from Elsevier
Bibliographic data for series maintained by Catherine Liu ().

 
Page updated 2025-03-19
Handle: RePEc:eee:phsmap:v:230:y:1996:i:1:p:300-312