Baity-Jesi M, Baños R A, Cruz A, Fernandez L A, Gil-Narvion J M, Gordillo-Guerrero A, Iñiguez D, Maiorano A, Mantovani F, Marinari E, Martin-Mayor V, Monforte-Garcia J, Muñoz Sudupe A, Navarro D, Parisi G, Perez-Gaviro S, Pivanti M, Ricci-Tersenghi F, Ruiz-Lorenzo J J, Schifano S F, Seoane B, Tarancon A, Tripiccione R, Yllanes D
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.
Instituto de Biocomputación y Física de Sistemas Complejos (BIFI), 50009 Zaragoza, Spain and Departamento de Física Teórica, Universidad de Zaragoza, 50009 Zaragoza, Spain.
Phys Rev E Stat Nonlin Soft Matter Phys. 2014 Mar;89(3):032140. doi: 10.1103/PhysRevE.89.032140. Epub 2014 Mar 31.
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.
我们研究了存在外磁场时三维伊辛自旋玻璃的非平衡动力学。我们在固定温度下以及采用退火协议进行了模拟。借助基于现场可编程门阵列（FPGA）的Janus专用计算机，我们得以在实验中达到相当于0.01秒的时间尺度。我们研究了高温和低温下系统的弛豫情况，明确确定了一个动力学转变点。这个动力学温度严格为正，并且依赖于外部施加的磁场。我们讨论了潜在物理机制的不同可能性，其中包括热力学自旋玻璃转变、模式耦合交叉，或者一种让人联想到结构玻璃随机一阶图像的解释。
