title: Dynamical transition in the D=3 Edwards-Anderson spin glass in an external magnetic field.
abstract: We study the off-equilibrium dynamics of the three-dimensional Ising spin glass in the presence of an external magnetic field. We have performed simulations both at fixed temperature and with an annealing protocol. Thanks to the Janus special-purpose computer, based on field-programmable gate array (FPGAs), we have been able to reach times equivalent to 0.01 s in experiments. We have studied the system relaxation both for high and for low temperatures, clearly identifying a dynamical transition point. This dynamical temperature is strictly positive and depends on the external applied magnetic field. We discuss different possibilities for the underlying physics, which include a thermodynamical spin-glass transition, a mode-coupling crossover, or an interpretation reminiscent of the random first-order picture of structural glasses.
authors.affiliation: Departamento de Física Teórica I, Universidad Complutense, 28040 Madrid, Spain and Dipartimento di Fisica, La Sapienza Università di Roma, 00185 Roma, Italy and Instituto de Biocomputación y Física de Sistemas Complejos (BIFI), 50009 Zaragoza, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Baity-Jesi
authors.affiliation: Instituto de Biocomputación y Física de Sistemas Complejos (BIFI), 50009 Zaragoza, Spain and Departamento de Física Teórica, Universidad de Zaragoza, 50009 Zaragoza, Spain.
authors.forename: R A
authors.initials: RA
authors.lastname: Baños
authors.affiliation: Instituto de Biocomputación y Física de Sistemas Complejos (BIFI), 50009 Zaragoza, Spain and Departamento de Física Teórica, Universidad de Zaragoza, 50009 Zaragoza, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Cruz
authors.affiliation: Departamento de Física Teórica I, Universidad Complutense, 28040 Madrid, Spain and Instituto de Biocomputación y Física de Sistemas Complejos (BIFI), 50009 Zaragoza, Spain.
authors.forename: L A
authors.initials: LA
authors.lastname: Fernandez
authors.affiliation: Instituto de Biocomputación y Física de Sistemas Complejos (BIFI), 50009 Zaragoza, Spain.
authors.forename: J M
authors.initials: JM
authors.lastname: Gil-Narvion
authors.affiliation: Instituto de Biocomputación y Física de Sistemas Complejos (BIFI), 50009 Zaragoza, Spain and D. de Ingeniería Eléctrica, Electrónica y Automática, U. de Extremadura, 10071, Cáceres, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Gordillo-Guerrero
authors.affiliation: Instituto de Biocomputación y Física de Sistemas Complejos (BIFI), 50009 Zaragoza, Spain and Fundación ARAID, Diputación General de Aragón, Zaragoza, Spain.
authors.forename: D
authors.initials: D
authors.lastname: Iñiguez
authors.affiliation: Dipartimento di Fisica, La Sapienza Università di Roma, 00185 Roma, Italy and Instituto de Biocomputación y Física de Sistemas Complejos (BIFI), 50009 Zaragoza, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Maiorano
authors.affiliation: Dipartimento di Fisica e Scienze della Terra, Università di Ferrara, and INFN, Ferrara, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Mantovani
authors.affiliation: Dipartimento di Fisica, IPCF-CNR, UOS Roma Kerberos and INFN, La Sapienza Università di Roma, 00185 Roma, Italy.
authors.forename: E
authors.initials: E
authors.lastname: Marinari
authors.affiliation: Departamento de Física Teórica I, Universidad Complutense, 28040 Madrid, Spain and Instituto de Biocomputación y Física de Sistemas Complejos (BIFI), 50009 Zaragoza, Spain.
authors.forename: V
authors.initials: V
authors.lastname: Martin-Mayor
authors.affiliation: Instituto de Biocomputación y Física de Sistemas Complejos (BIFI), 50009 Zaragoza, Spain and Departamento de Física Teórica, Universidad de Zaragoza, 50009 Zaragoza, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Monforte-Garcia
authors.affiliation: Departamento de Física Teórica I, Universidad Complutense, 28040 Madrid, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Muñoz Sudupe
authors.affiliation: D. de Ingeniería, Electrónica y Comunicaciones and I3A, U. de Zaragoza, 50018 Zaragoza, Spain.
authors.forename: D
authors.initials: D
authors.lastname: Navarro
authors.affiliation: Dipartimento di Fisica, IPCF-CNR, UOS Roma Kerberos and INFN, La Sapienza Università di Roma, 00185 Roma, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Parisi
authors.affiliation: Instituto de Biocomputación y Física de Sistemas Complejos (BIFI), 50009 Zaragoza, Spain and Fundación ARAID, Diputación General de Aragón, Zaragoza, Spain.
authors.forename: S
authors.initials: S
authors.lastname: Perez-Gaviro
authors.affiliation: Dipartimento di Fisica e Scienze della Terra, Università di Ferrara, and INFN, Ferrara, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Pivanti
authors.affiliation: Dipartimento di Fisica, IPCF-CNR, UOS Roma Kerberos and INFN, La Sapienza Università di Roma, 00185 Roma, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Ricci-Tersenghi
authors.affiliation: Instituto de Biocomputación y Física de Sistemas Complejos (BIFI), 50009 Zaragoza, Spain and Departamento de Física, Universidad de Extremadura, 06071 Badajoz, Spain.
authors.forename: J J
authors.initials: JJ
authors.lastname: Ruiz-Lorenzo
authors.affiliation: Dipartimento di Matematica e Informatica, Università di Ferrara and INFN, Ferrara, Italy.
authors.forename: S F
authors.initials: SF
authors.lastname: Schifano
authors.affiliation: Dipartimento di Fisica, La Sapienza Università di Roma, 00185 Roma, Italy and Instituto de Biocomputación y Física de Sistemas Complejos (BIFI), 50009 Zaragoza, Spain.
authors.forename: B
authors.initials: B
authors.lastname: Seoane
authors.affiliation: Instituto de Biocomputación y Física de Sistemas Complejos (BIFI), 50009 Zaragoza, Spain and Departamento de Física Teórica, Universidad de Zaragoza, 50009 Zaragoza, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Tarancon
authors.affiliation: Dipartimento di Fisica e Scienze della Terra, Università di Ferrara, and INFN, Ferrara, Italy.
authors.forename: R
authors.initials: R
authors.lastname: Tripiccione
authors.affiliation: Dipartimento di Fisica, La Sapienza Università di Roma, 00185 Roma, Italy and Instituto de Biocomputación y Física de Sistemas Complejos (BIFI), 50009 Zaragoza, Spain.
authors.forename: D
authors.initials: D
authors.lastname: Yllanes