# Shortcuts to adiabaticity: concepts, methods, and applications

## TL;DR

Shortcuts to adiabaticity (STA) are analytical and numerical techniques that enable rapid system state changes, with broad applications in quantum, optical, and classical systems, enhancing speed, robustness, and efficiency.

## Contribution

This paper reviews the concepts, methods, and applications of STA, highlighting their versatility and potential for advancing quantum control and other fields.

## Key findings

- STA enable faster system manipulations than traditional adiabatic processes.
- Multiple STA paths can improve robustness against noise.
- STA techniques extend beyond quantum systems to classical and optical domains.

## Abstract

Shortcuts to adiabaticity (STA) are fast routes to the final results of slow, adiabatic changes of the controlling parameters of a system. The shortcuts are designed by a set of analytical and numerical methods suitable for different systems and conditions. A motivation to apply STA methods to quantum systems is to manipulate them on timescales shorter than decoherence times. Thus shortcuts to adiabaticity have become instrumental in preparing and driving internal and motional states in atomic, molecular, and solid-state physics. Applications range from information transfer and processing based on gates or analog paradigms to interferometry and metrology. The multiplicity of STA paths for the controlling parameters may be used to enhance robustness versus noise and perturbations or to optimize relevant variables. Since adiabaticity is a widespread phenomenon, STA methods also extended beyond the quantum world to optical devices, classical mechanical systems, and statistical physics. Shortcuts to adiabaticity combine well with other concepts and techniques, in particular, with optimal control theory, and pose fundamental scientific and engineering questions such as finding speed limits, quantifying the third law, or determining process energy costs and efficiencies. Concepts, methods, and applications of shortcuts to adiabaticity are reviewed and promising prospects are outlined, as well as open questions and challenges ahead.