论文标题
用Rydberg原子阵列中驱动量子疤痕控制多体动力学
Controlling many-body dynamics with driven quantum scars in Rydberg atom arrays
论文作者
论文摘要
在多体系统中控制非平衡量子动力学是一个突出的挑战，因为相互作用通常会导致热量化和整个希尔伯特空间的混乱蔓延。我们在一个和两个空间维度中由3至200个强烈相互作用的量子组组成的多体系统中快速淬火后，实验研究了非平衡动力学。使用基于Rydberg原子阵列的可编程量子模拟器，我们探测与量子多体疤痕相对应的相干复兴。值得注意的是，我们发现可以通过定期驾驶来稳定疤痕的复兴，从而产生了类似于离散的时间晶体秩序的强大次谐波响应。我们绘制了希尔伯特空间动力学，几何依赖性，相图和这种新兴现象的系统尺寸依赖性，展示了在多体系统中引导纠缠动态的新颖方法，并在量子信息科学中实现了潜在的应用。
Controlling non-equilibrium quantum dynamics in many-body systems is an outstanding challenge as interactions typically lead to thermalization and a chaotic spreading throughout Hilbert space. We experimentally investigate non-equilibrium dynamics following rapid quenches in a many-body system composed of 3 to 200 strongly interacting qubits in one and two spatial dimensions. Using a programmable quantum simulator based on Rydberg atom arrays, we probe coherent revivals corresponding to quantum many-body scars. Remarkably, we discover that scar revivals can be stabilized by periodic driving, which generates a robust subharmonic response akin to discrete time-crystalline order. We map Hilbert space dynamics, geometry dependence, phase diagrams, and system-size dependence of this emergent phenomenon, demonstrating novel ways to steer entanglement dynamics in many-body systems and enabling potential applications in quantum information science.
