Quantum dynamics of a nanomagnet in a rotating field

TL;DR

This paper investigates the quantum behavior of a two-state nanomagnet in a rotating magnetic field, providing analytical and numerical insights into transition probabilities and noise effects within the Landau-Zener-Stueckelberg framework.

Contribution

It offers new analytical and numerical results for the transition probabilities of a nanomagnet under rotation, including noise effects, extending the Landau-Zener-Stueckelberg theory.

Findings

Analytical and numerical transition probabilities derived.

Noise impacts on quantum evolution analyzed.

Extension of Landau-Zener-Stueckelberg theory to rotating fields.

Abstract

Quantum dynamics of a two-state spin system in a rotating magnetic field has been studied. Analytical and numerical results for the transition probability have been obtained along the lines of the Landau-Zener-Stueckelberg theory. The effect of various kinds of noise on the evolution of the system has been analyzed.