论文标题
照片诱导的超导率=离散的时间晶体？
Photo-induced Superconductivity = Discrete Time Crystal?
论文作者
论文摘要
我们建议定期驾驶可以稳定新型阶，即“周期倍增超导性”，其中超导顺序参数的振荡速度是驱动器频率的一半。尽管有零时间平均订单参数，但有序状态表现出完美的电导率和Meissner效应。我们的理论预测，这一阶段可能被实现为表现出光诱导超导性的材料的稳态状态。我们建议通过利用光诱导的超导体和常规超导体之间的约瑟夫森连接来检测顺序参数的倍增振荡。我们的理论也可以通过光学晶格中冷骨原子的参数驱动来实现。
We propose that periodic driving can stabilize a new type of order, "period-doubled superconductivity", in which a superconducting order parameter oscillates at half the frequency of the drive. Despite having a zero time-averaged order parameter, the ordered state exhibits perfect conductivity and a Meissner effect. Our theory predicts that this phase may be realized as the steady state of materials shown to exhibit photo-induced superconductivity. We propose to detect the period-doubled oscillation of the order parameter by utilizing a Josephson junction between a photo-induced superconductor and a conventional superconductor. Our theory can also be realized via parametric driving of cold bosonic atoms in an optical lattice.
