{ "id": "1403.2622", "version": "v2", "published": "2014-03-11T15:57:10.000Z", "updated": "2014-04-02T09:43:22.000Z", "title": "The three dimensional Ising spin glass in an external magnetic field: the role of the silent majority", "authors": [ "Janus Collaboration", "M. Baity-Jesi", "R. A. Banos", "A. Cruz", "L. A. Fernandez", "J. M. Gil-Narvion", "A. Gordillo-Guerrero", "D. Iniguez", "A. Maiorano", "F. Mantovani", "E. Marinari", "V. Martin-Mayor", "J. Monforte-Garcia", "A. Munoz Sudupe", "D. Navarro", "G. Parisi", "S. Perez-Gaviro", "M. Pivanti", "F. Ricci-Tersenghi", "J. J. Ruiz-Lorenzo", "S. F. Schifano", "B. Seoane", "A. Tarancon", "R. Tripiccione", "D. Yllanes" ], "comment": "42 pages, 19 figures. Minor changes and added figure (results unchanged)", "journal": "J. Stat. Mech. (2014) P05014", "doi": "10.1088/1742-5468/2014/05/P05014", "categories": [ "cond-mat.dis-nn" ], "abstract": "We perform equilibrium parallel-tempering simulations of the 3D Ising Edwards-Anderson spin glass in a field. A traditional analysis shows no signs of a phase transition. Yet, we encounter dramatic fluctuations in the behaviour of the model: Averages over all the data only describe the behaviour of a small fraction of it. Therefore we develop a new approach to study the equilibrium behaviour of the system, by classifying the measurements as a function of a conditioning variate. We propose a finite-size scaling analysis based on the probability distribution function of the conditioning variate, which may accelerate the convergence to the thermodynamic limit. In this way, we find a non-trivial spectrum of behaviours, where a part of the measurements behaves as the average, while the majority of them shows signs of scale invariance. As a result, we can estimate the temperature interval where the phase transition in a field ought to lie, if it exists. Although this would-be critical regime is unreachable with present resources, the numerical challenge is finally well posed.", "revisions": [ { "version": "v2", "updated": "2014-04-02T09:43:22.000Z" } ], "analyses": { "keywords": [ "dimensional ising spin glass", "external magnetic field", "silent majority", "3d ising edwards-anderson spin glass", "phase transition" ], "tags": [ "journal article" ], "publication": { "journal": "Journal of Statistical Mechanics: Theory and Experiment", "year": 2014, "month": "May", "volume": 2014, "number": 5, "pages": "05014" }, "note": { "typesetting": "TeX", "pages": 42, "language": "en", "license": "arXiv", "status": "editable", "adsabs": "2014JSMTE..05..014B" } } }