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The retrieval phase of the Hopfield model: A rigorous analysis of the overlap distribution*
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  • Published: January 1997

The retrieval phase of the Hopfield model: A rigorous analysis of the overlap distribution*

  • Anton Bovier1 &
  • Véronique Gayrard2 

Probability Theory and Related Fields volume 107, pages 61–98 (1997)Cite this article

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Summary.

Standard large deviation estimates or the use of the Hubbard–Stratonovich transformation reduce the analysis of the distribution of the overlap parameters essentially to that of an explicitly known random function Φ N,β on ℝ M. In this article we present a rather careful study of the structure of the minima of this random function related to the retrieval of the stored patterns. We denote by m * (β ) the modulus of the spontaneous magnetization in the Curie–Weiss model and by α the ratio between the number of the stored patterns and the system size. We show that there exist strictly positive numbers 0 < γ a < γ c such that (1) If √α≦γ a (m * (β )) 2, then the absolute minima of Φ are located within small balls around the points ± m * e μ , where e μ denotes the μ-th unit vector while (2) if √α≦γ c (m * (β )) 2 at least a local minimum surrounded by extensive energy barriers exists near these points. The random location of these minima is given within precise bounds. These are used to prove sharp estimates on the support of the Gibbs measures.

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Authors and Affiliations

  1. Weierstraß-Institut für Angewandte Analysis und Stochastik, Mohrenstraße 39, D-10117 Berlin, Germany (e-mail: bovier@ wias-berlin.de), , , , , , DE

    Anton Bovier

  2. Centre de Physique Théorique - CNRS, Luminy, Case 907, F-13288 Marseille Cedex 9, France (e-mail: gayrard@ cpt.univ-mrs.fr), , , , , , FR

    Véronique Gayrard

Authors
  1. Anton Bovier
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  2. Véronique Gayrard
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Received: 5 August 1995 / In revised form: 22 May 1996

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Bovier, A., Gayrard, V. The retrieval phase of the Hopfield model: A rigorous analysis of the overlap distribution* . Probab Theory Relat Fields 107, 61–98 (1997). https://doi.org/10.1007/s004400050077

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  • Issue Date: January 1997

  • DOI: https://doi.org/10.1007/s004400050077

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  • Mathematics Subject Classification (1991): 82B44
  • 60K35
  • 82C32
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