Geodesic
Correlation functions of one-dimensional Bose gas in thermodynamic equilibrium
Teoretičeskaâ i matematičeskaâ fizika, Tome 60 (1984) no. 2, pp. 262-269

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The state of thermodynamic equilibrium of a one-dimensional Bose gas at nonzero temperature is considered. A method of calculating the correlation functions in this system is illustrated by the simplest example of the current correlation function. The expressions of the algebraic Bethe ansatz [1] are extremely helpful. 
@article{TMF_1984_60_2_a8,
     author = {N. M. Bogolyubov and V. E. Korepin},
     title = {Correlation functions of one-dimensional {Bose} gas in thermodynamic equilibrium},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {262--269},
     publisher = {mathdoc},
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     number = {2},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1984_60_2_a8/}
}
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N. M. Bogolyubov; V. E. Korepin. Correlation functions of one-dimensional Bose gas in thermodynamic equilibrium. Teoretičeskaâ i matematičeskaâ fizika, Tome 60 (1984) no. 2, pp. 262-269. http://geodesic.mathdoc.fr/item/TMF_1984_60_2_a8/