论文标题
电流携带量子点模拟器中电荷时间晶体的出现和动力稳定性
Emergence and Dynamical Stability of Charge Time-Crystal in a Current-Carrying Quantum Dot Simulator
论文作者
论文摘要
定期以永不热化的开放量子系统表现出离散的时晶行为，这是一种在量子信息处理应用中显示出希望的非平衡量子现象。时间结晶的测量目前仅限于原子腔系统和自旋系统中的（磁性）光学实验，从而使其成为间接测量。从理论上讲，我们可以表明可以直接从无旋转的哈伯德梯子中的电荷中测量时间结晶，可以在量子点阵列上模拟。我们证明，一个人可以动态调整系统，然后重新回到时间晶体阶段，证明其对外部强迫的稳健性。这些发现激发了进一步的理论和实验努力，以模拟当前携带纳米级系统中的时间晶体现象。
Periodically-driven open quantum systems that never thermalize exhibit a discrete time-crystal behavior, a non-equilibrium quantum phenomenon that has shown promise in quantum information processing applications. Measurements of time-crystallinity are currently limited to (magneto-) optical experiments in atom-cavity systems and spin-systems making it an indirect measurement. We theoretically show that time-crystallinity can be measured directly in the charge-current from a spin-less Hubbard ladder, which can be simulated on a quantum-dot array. We demonstrate that one can dynamically tune the system out and then back into the time-crystal phase, proving its robustness against external forcings. These findings motivate further theoretical and experimental efforts to simulate the time-crystal phenomena in current-carrying nano-scale systems.
