自旋玻璃中的Mpemba效应是一种持久的记忆效应
The Mpemba effect in spin glasses is a persistent memory effect
摘要：
当一个热的系统比一个最初较冷的系统冷却得更快时，当两者都在同一个热库中冷却时，就会发生Mpemba效应。使用定制的超级计算机Janus II，我们研究了自旋玻璃中的Mpemba效应，并表明它是一个非平衡过程，由系统的相干长度决定。当浴温处于玻璃相时，该效应发生，但热协议不必越过临界温度。事实上，姆彭巴效应是由内能和电子能之间的强关系引起的，这是处于玻璃态的一个确定的信号。因此，Mpemba效应为过冷液体和其他玻璃形成体的相干长度的实验研究提供了一条有趣的新途径。
英文摘要：
The Mpemba effect occurs when a hot system cools faster than an initially colder one, when both are refrigerated in the same thermal reservoir. Using the custom built supercomputer Janus II, we study the Mpemba effect in spin glasses and show that it is a non-equilibrium process, governed by the coherence length ξof the system. The effect occurs when the bath temperature lies in the glassy phase, but it is not necessary for the thermal protocol to cross the critical temperature. In fact, the Mpemba effect follows from a strong relationship between the internal energy and ξthat turns out to be a sure-tell sign of being in the glassy phase. Thus, the Mpemba effect presents itself as an intriguing new avenue for the experimental study of the coherence length in supercooled liquids and other glass formers.
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