在固态λ系统中使用超绝热动力学的加速量子控制
Accelerated quantum control using superadiabatic dynamics in a solid-state lambda system
摘要：
绝热演化在量子态工程、几何量子计算和量子模拟中有着广泛的应用。尽管绝热过程对实验缺陷具有鲁棒性，但由于其较长的演化时间，绝热过程容易受到退相干的影响。一个被称为“绝热捷径”（STA）的一般策略旨在通过设计快速动态再现缓慢，绝热演化的结果来弥补这种脆弱性。在这里，我们实现了一种新的STA技术，称为“超绝热无跃迁驱动”（SATD），以加快受激拉曼绝热通道（STIRAP）在固态λ（Λ）系统。利用金刚石中氮空位（NV）中心到耗散激发态的光跃迁，我们证明了不同的捷径轨道对布居转移以及相干叠加的初始化和转移的加速性能。我们发现，SATD协议表现出鲁棒性耗散和实验的不确定性，并可以优化时，这些影响。这些结果促使STA作为一个有前途的工具，用于控制开放量子系统，包括单独或混合纳米机械，超导，和光子元件在固态。
英文摘要：
Adiabatic evolutions find widespread utility in applications to quantum state engineering, geometric quantum computation, and quantum simulation. Although offering robustness to experimental imperfections, adiabatic processes are susceptible to decoherence due to their long evolution time. A general strategy termed "shortcuts to adiabaticity" (STA) aims to remedy this vulnerability by designing fast dynamics to reproduce the results of slow, adiabatic evolutions. Here, we implement a novel STA technique known as "superadiabatic transitionless driving" (SATD) to speed up stimulated Raman adiabatic passage (STIRAP) in a solid-state lambda (Λ) system. Utilizing optical transitions to a dissipative excited state in the nitrogen-vacancy (NV) center in diamond, we demonstrate the accelerated performance of different shortcut trajectories for population transfer and for the initialization and transfer of coherent superpositions. We reveal that SATD protocols exhibit robustness to dissipation and experimental uncertainty, and can be optimized when these effects are present. These results motivate STA as a promising tool for controlling open quantum systems comprising individual or hybrid nanomechanical, superconducting, and photonic elements in the solid state.
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