Abstract
The partition function for a one-dimensional system of Bosons with repulsive delta-function interaction is investigated. We prove that if the Bethe Ansatz eigenfunctions form a complete set then the grand canonical pressure is given by the Yang-Yang formula. The proof uses a probabilistic formalism to express the partition function as an expectation with respect to a probability measure on a Banach space of measures; the asymptotic behaviour of the expectation in the thermodynamic limit is determined by the Large Deviation Principle. This method is applicable in situations in which the Hamiltonian can be diagonalised using the Bethe Ansatz.
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Communicated by J. Fröhlich
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Dorlas, T.C., Lewis, J.T. & Pulé, J.V. The Yang-Yang thermodynamic formalism and Large Deviations. Commun.Math. Phys. 124, 365–402 (1989). https://doi.org/10.1007/BF01219656
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DOI: https://doi.org/10.1007/BF01219656