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English

Exact perturbative results for the Lieb-Liniger and Gaudin-Yang models

Published inJournal of Statistical Physics, vol. 177, no. 6, p. 1148-1156
Publication date2019
Abstract

We present a systematic procedure to extract the perturbative series for the ground state energy density in the Lieb-Liniger and Gaudin-Yang models, starting from the Bethe ansatz solution. This makes it possible to calculate explicitly the coefficients of these series and to study their large order behavior. We find that both series diverge factorially and are not Borel summable. In the case of the Gaudin-Yang model, the first Borel singularity is determined by the non-perturbative energy gap. This provides a new perspective on the Cooper instability.

Classification
  • arxiv : math-ph
Note5 pages, 1 figure; v4: references added, typos corrected, published version
Citation (ISO format)
MARINO BEIRAS, Marcos, MARTINS DE OLIVEIRA, Tomas. Exact perturbative results for the Lieb-Liniger and Gaudin-Yang models. In: Journal of Statistical Physics, 2019, vol. 177, n° 6, p. 1148–1156. doi: 10.1007/s10955-019-02413-1
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Article (Accepted version)
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Identifiers
Journal ISSN0022-4715
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Creation28/01/2020 15:47:00
First validation28/01/2020 15:47:00
Update time17/01/2025 17:42:37
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