Abstract
We show transience of the edge-reinforced random walk (ERRW) for small reinforcement in dimension \({d\ge3}\). This proves the existence of a phase transition between recurrent and transient behavior, thus solving an open problem stated by Diaconis in 1986. The argument adapts the proof of quasi-diffusive behavior of the supersymmetric (SuSy) hyperbolic model for fixed conductances by Disertori et al. (Commun Math Phys 300:435–486, 2010), using the representation of ERRW as a mixture of vertex-reinforced jump processes (VRJP) with independent gamma conductances, and the interpretation of the limit law of VRJP as a SuSy hyperbolic sigma model developed by Sabot and Tarrès (J Eur Math Soc, arXiv:1111.3991, 2015).
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Communicated by H. Spohn
This work was supported by the ANR project MEMEMO2, ERC Starting Grant CoMBoS and by the LABEX MILYON (ANR-10-LABX-0070) of Université de Lyon, within the program “Investissements d’Avenir” (ANR-11-IDEX-0007) operated by the French National Research Agency (ANR).
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Disertori, M., Sabot, C. & Tarrès, P. Transience of Edge-Reinforced Random Walk. Commun. Math. Phys. 339, 121–148 (2015). https://doi.org/10.1007/s00220-015-2392-y
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DOI: https://doi.org/10.1007/s00220-015-2392-y