Superadiabatic thermalization of a quantum oscillator by engineered dephasing

TL;DR

This paper introduces a method to rapidly control Gaussian states in open quantum systems by engineering dephasing and trap frequency modulation, enabling fast thermal state preparation in finite time.

Contribution

It presents a novel shortcut technique for open quantum processes, extending control methods beyond isolated systems to non-unitary dynamics.

Findings

Achieves fast thermal state preparation in finite time.

Provides explicit protocols for trap frequency and dephasing modulation.

Applicable to various experimental platforms.

Abstract

Fast nonadiabatic control protocols known as shortcuts to adiabaticity have found a plethora of applications, but their use has been severely limited to speeding up the dynamics of isolated quantum systems. We introduce shortcuts for open quantum processes that make possible the fast control of Gaussian states in non-unitary processes. Specifically, we provide the time modulation of the trap frequency and dephasing strength that allow preparing an arbitrary thermal state in a finite time. Experimental implementation can be done via stochastic parametric driving or continuous measurements, readily accessible in a variety of platforms.