论文标题
AC Josephson的效应在两个超流动时间晶体之间
AC Josephson effect between two superfluid time crystals
论文作者
论文摘要
量子时间晶体的系统是在时间域中自发新兴的周期顺序的特征。已经报道了一系列此类阶段。这个概念甚至在流行文献中进行了讨论，值得一提的是：虽然第一个阶段的时间翻译对称阶段没有使用“ Time Crystal”这个名字，但后来被1980年的流行文化采用。但是，对于物理界而言，新概念的最终资格是其提供预测和见解的能力。确认时间晶体表现出量子力学的基本动力学是沿该方向的必要步骤。我们通过实验研究了两个相邻的量子时间晶体。时间晶体是由超氟$^3 $ he-b中的两个木凝结物所实现的，交换了磁蛋白，导致其种群中相对相对的振荡 - AC Josephson效应 - 而定义的周期性运动在整个实验中保持相位相干。
Quantum time crystals are systems characterised by spontaneously emerging periodic order in the time domain. A range of such phases has been reported. The concept has even been discussed in popular literature, and deservedly so: while the first speculation on a phase of broken time translation symmetry did not use the name "time crystal", it was later adopted from 1980's popular culture. For the physics community, however, the ultimate qualification of a new concept is its ability to provide predictions and insight. Confirming that time crystals manifest the basic dynamics of quantum mechanics is a necessary step in that direction. We study two adjacent quantum time crystals experimentally. The time crystals, realised by two magnon condensates in superfluid $^3$He-B, exchange magnons leading to opposite-phase oscillations in their populations -- AC Josephson effect -- while the defining periodic motion remains phase coherent throughout the experiment.
