# Shortcuts to adiabaticity in the presence of a continuum: applications to itinerant quantum state transfer

## TL;DR

This paper introduces a method to accelerate adiabatic quantum protocols involving a continuum, effectively canceling non-adiabatic and dissipative errors to enable perfect quantum state transfer even under constraints.

## Contribution

The authors develop a novel shortcut-to-adiabaticity technique for systems coupled to a continuum, enhancing transfer fidelity in constrained quantum setups.

## Key findings

- Achieves perfect state transfer despite finite protocol speed.
- Cancels non-adiabatic and dissipative errors simultaneously.
- Operates effectively with minimal control fields.

## Abstract

We present a method for accelerating adiabatic protocols for systems involving a coupling to a continuum, one that cancels both non-adiabatic errors as well as errors due to dissipation. We focus on applications to a generic quantum state transfer problem, where the goal is to transfer a state between a single level or mode, and a propagating temporal mode in a waveguide or transmission line. Our approach enables perfect adiabatic transfer protocols in this setup, despite a finite protocol speed and a finite waveguide coupling. Our approach even works in highly constrained settings, where there is only a single time-dependent control field available.