Stroboscopic aliasing in long-range interacting quantum systems
Stroboscopic aliasing in long-range interacting quantum systems
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DOI：
10.21468/scipostphyscore.4.3.021
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发表时间：
2020-11
影响因子：
3.6
通讯作者：
S. Kelly;E. Timmermans;J. Marino;S. Tsai
中科院分区：
文献类型：
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作者：
S. Kelly;E. Timmermans;J. Marino;S. Tsai
我们揭示了一种在远程相互作用量子多粒子自旋系统中产生具有给定外部驱动周期的任意多重态振荡的机制。这些振荡打破了时间晶体的离散时间平移对称性，但它们是通过两个交织在一起的频闪效应来理解的，类似于视频录制单个快速旋转的直升机叶片所产生的混叠。第一种效果类似于单个叶片出现为多个叶片，由于帧率是在与直升机叶片的旋转频率共振；第二种类似于直升机叶片反向运动的光学外观。类似于相互作用的量子多体系统中的其他动态稳定状态，这种频频混叠对一组选定的驱动参数的失谐和偏移具有鲁棒性，并为远程量子模拟器中的动态n-二元态工程提供了新的途径，具有潜在的应用于自旋压缩生成和纠缠态制备。
We unveil a mechanism for generating oscillations with arbitrary multiplets of the period of a given external drive, in long-range interacting quantum many-particle spin systems. These oscillations break discrete time translation symmetry as in time crystals, but they are understood via two intertwined stroboscopic effects similar to the aliasing resulting from video taping a single fast rotating helicopter blade. The first effect is similar to a single blade appearing as multiple blades due to a frame rate that is in resonance with the frequency of the helicopter blades' rotation; the second is akin to the optical appearance of the helicopter blades moving in reverse direction. Analogously to other dynamically stabilized states in interacting quantum many-body systems, this stroboscopic aliasing is robust to detuning and excursions from a chosen set of driving parameters, and it offers a novel route for engineering dynamical n-tuplets in long-range quantum simulators, with potential applications to spin squeezing generation and entangled state preparation.