Masuda S, Nakamura K
Research Center for Emerging Computing Technologies (RCECT), National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1, Umezono, Tsukuba, Ibaraki 305-8568, Japan.
Faculty of Physics, National University of Uzbekistan, Vuzgorodok, Tashkent 100174, Uzbekistan.
Philos Trans A Math Phys Eng Sci. 2022 Dec 26;380(2239):20210278. doi: 10.1098/rsta.2021.0278. Epub 2022 Nov 7.
Speed is the key to further advances in technology. For example, quantum technologies, such as quantum computing, require fast manipulations of quantum systems in order to overcome the effect of decoherence. However, controlling the speed of quantum dynamics is often very difficult due to both the lack of a simple scaling property in the dynamics and the infinitely large parameter space to be explored. Therefore, protocols for speed control based on understanding of the dynamical properties of the system, such as non-trivial scaling property, are highly desirable. Fast-forward scaling theory (FFST) was originally developed to provide a way to accelerate, decelerate, stop and reverse the dynamics of quantum systems. FFST has been extended in order to accelerate quantum and classical adiabatic dynamics of various systems including cold atoms, internal state of molecules, spins and solid-state artificial atoms. This paper describes the basic concept of FFST and reviews the recent developments and its applications such as fast state-preparations, state protection and ion sorting. We introduce a method, called inter-trajectory travel, recently derived from FFST. We also point out the significance of deceleration in quantum technology. This article is part of the theme issue 'Shortcuts to adiabaticity: theoretical, experimental and interdisciplinary perspectives'.
速度是技术进一步发展的关键。例如，量子技术，如量子计算，需要对量子系统进行快速操作，以克服退相干效应。然而，由于动力学中缺乏简单的缩放特性以及需要探索的无限大参数空间，控制量子动力学的速度通常非常困难。因此，基于对系统动力学特性（如非平凡缩放特性）的理解来进行速度控制的协议是非常可取的。快进缩放理论（FFST）最初是为了提供一种加速、减速、停止和反转量子系统动力学的方法而开发的。FFST已经得到扩展，以加速包括冷原子、分子内部状态、自旋和固态人造原子在内的各种系统的量子和经典绝热动力学。本文描述了FFST的基本概念，并回顾了其最新进展及其应用，如快速态制备、态保护和离子分选。我们介绍了一种最近从FFST推导出来的方法，称为轨迹间旅行。我们还指出了减速在量子技术中的重要性。本文是主题为“绝热捷径：理论、实验和跨学科视角”的一部分。
