Adiabatic state preparation and thermalization of simulated phase noise in a Rydberg spin Hamiltonian

TL;DR

This paper investigates how laser phase noise affects adiabatic state preparation and thermalization in a Rydberg spin chain, revealing that noise can induce approximate thermalization of the system's correlations.

Contribution

It introduces a stochastic sampling method to simulate experimentally relevant phase noise and analyzes its impact on many-body adiabatic processes in Rydberg systems.

Findings

Phase noise can cause approximate thermalization of correlations.

The interplay between heating and interactions influences adiabatic dynamics.

Simulations match experimental spectral densities of laser noise.

Abstract

Laser phase noise is one of the main sources of decoherence in driven Rydberg systems with neutral atoms in tweezer arrays. While the effect of phase noise in the regimes of isolated qubits and few-qubit gate protocols has been studied extensively, there are open questions about the effects of this noise on many-body systems. In many scenarios, the effects of noise cannot simply be described by an increase in the energy or temperature of the system, leading to non-trivial changes in the state and relevant correlations. In this work, we use stochastic sampling to simulate laser phase noise based on experimentally relevant spectral densities. We explore the impact of this noise on adiabatic state preparation in a one-dimensional system, discussing the interplay between heating and interactions during dynamics. We find that for certain adiabatic processes, the noise can be seen to approximately thermalize in terms of its effects on relevant correlation functions.