论文标题
通过摇动近距离环境，量子动态解耦
Quantum dynamical decoupling by shaking the close environment
论文作者
论文摘要
量子动态解耦是通过应用快速驱动的序列来取消两个系统之间有效耦合的过程，在该序列下，Hamiltonian耦合的平均耦合到领先顺序（S）。它的突出用途之一是以将目标系统从受保护的较弱的方法中解脱出来的方式驱动目标系统。本手稿调查了双重策略：在嘈杂的“环境”子系统上作用，例如将其与目标系统脱离。潜在的优势在于，对环境的行动通过系统操作通勤，而脱钩驱动的不确定对目标无害。我们考虑两个版本的环境侧解耦：添加不精确的哈密顿驱动器，以激发环境组件；并提高环境上的分解速率。后者可以看作是用纯粹的噪音驱动环境，我们的结论确定了可能在违反直觉上，将环境与噪声源隔离开来通常不是最佳选择。我们明确分析了目标系统上的诱导的分解性，并确定在两种情况下它如何受参数的影响。该分析结合了Lindbladian的推导，绝热消除和浮雕建模，以可能具有独立感兴趣的方式。
Quantum dynamical decoupling is a procedure to cancel the effective coupling between two systems by applying sequences of fast actuations, under which the coupling Hamiltonian averages out to leading order(s). One of its prominent uses is to drive a target system in such a way as to decouple it from a less protected one. The present manuscript investigates the dual strategy: acting on a noisy "environment" subsystem such as to decouple it from a target system. The potential advantages are that actions on the environment commute with system operations, and that imprecisions in the decoupling actuation are harmless to the target. We consider two versions of environment-side decoupling: adding an imprecise Hamiltonian drive which stirs the environment components; and, increasing the decoherence rates on the environment. The latter can be viewed as driving the environment with pure noise and our conclusions establish how, maybe counterintuitively, isolating the environment from noise sources as much as possible is often not the best option. We explicitly analyze the induced decoherence on the target system and establish how it is influenced by the parameters in both cases. The analysis combines Lindbladian derivation, adiabatic elimination, and Floquet modeling in a way that may be of independent interest.
