98-469 Angelescu N., Verbeure A., Zagrebnov V.A.

Quantum n-Vector Anharmonic Crystal I: 1/n-Expansion (42K, latex) Jun 23, 98

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Abstract. We consider the finite-volume quantum $n$-vector anharmonic crystal in the large $n$ limit and compute corrections to the corresponding Hartree-Fock system. In particular we prove the complete $1/n$-asymptotic series of the free energy, the Gibbs canonical state, and the distributions of the displacement and squared displacement fluctuation operators.

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