Work

Quantum walks in weak stochastic gauge fields

Year: 2024

Type: article

Abstract: Contrary to the ballistic dynamics of standard quantum walks, the behavior of stochastic quantum walks is known to be diffusive. Here we study discrete time quantum walks in weak stochastic gauge fields. In the case of position and spin dependent gauge field, we observe a transition from ballistic to diffusive motion, with the probability distribution becoming Gaussian. However, in contradiction to common belief, weak stochastic electric gauge fields reveal the persistence of Bloch oscillations despite decoherence which we demonstrate on simulations and prove analytically. The proposed models provide insights into the interplay between randomness and coherent dynamics of quantum walks.

Source: Physics Letters A

DOI: 10.1016/j.physleta.2024.129605

Author: Jan Wójcik

Institution: Adam Mickiewicz University in Poznań

Language: English

Topic: Quantum Computing Algorithms and Architecture

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,790

Funder: Narodowe Centrum Nauki