Geodesic
The~ensemble equivalence problem for Bose systems (nonideal Bose gas)
Teoretičeskaâ i matematičeskaâ fizika, Tome 69 (1986) no. 3, pp. 420-438

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The problem of the equivalence of the canonical and grand canonical ensembles for nonideal Bose systems is considered for the example of three exactly solvable models, each of which undergoes a phase transition with the formation of a Bose condensate. It is shown that violation of the statistical (strong) equivalence of the ensembles is not a simple consequence of Bose condensation and equivalence is restored by changing the kind of the phase transition. 
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     author = {V. A. Zagrebnov and V. V. Papoyan},
     title = {The~ensemble equivalence problem for {Bose} systems (nonideal {Bose} gas)},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {420--438},
     publisher = {mathdoc},
     volume = {69},
     number = {3},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1986_69_3_a9/}
}
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V. A. Zagrebnov; V. V. Papoyan. The~ensemble equivalence problem for Bose systems (nonideal Bose gas). Teoretičeskaâ i matematičeskaâ fizika, Tome 69 (1986) no. 3, pp. 420-438. http://geodesic.mathdoc.fr/item/TMF_1986_69_3_a9/