Accelerating Dissipative State Preparation with Adaptive Open Quantum Dynamics

TL;DR

This paper introduces an adaptive open quantum dynamics method that overcomes the typical time-entanglement tradeoff, enabling rapid stabilization of maximally entangled states in dissipative quantum systems.

Contribution

It presents a novel adaptive dynamics approach that circumvents the entanglement-related slowdown in dissipative state preparation, applicable to many-body entangled states.

Findings

Achieves finite-time stabilization of maximally entangled states.

Compatible with various experimental platforms.

Circumvents traditional time-entanglement tradeoff.

Abstract

A wide variety of dissipative state preparation schemes suffer from a basic time-entanglement tradeoff: the more entangled the steady state, the slower the relaxation to the steady state. Here, we show how a minimal kind of adaptive dynamics can be used to completely circumvent this tradeoff, and allow the dissipative stabilization of maximally entangled states with a finite time-scale. Our approach takes inspiration from simple fermionic stabilization schemes, which surprisingly are immune to entanglement-induced slowdown. We describe schemes for accelerated stabilization of many-body entangled qubit states (including spin squeezed states), both in the form of discretized Floquet circuits, as well as continuous time dissipative dynamics. Our ideas are compatible with a number of experimental platforms.