Landau-Zener-Stuckelberg interference in a multi-anticrossing system

TL;DR

This paper introduces a universal analytical approach to analyze Landau-Zener-Stuckelberg interference in multi-anticrossing systems driven by large-amplitude pulses, explaining experimental patterns and enabling spectral analysis.

Contribution

The authors develop a novel analytical method for multi-anticrossing systems under large pulses, explaining interference patterns and extracting energy spectra, advancing understanding of quantum dynamics.

Findings

The method accurately reproduces observed interference patterns.

Fourier analysis of patterns reveals energy level information.

The approach is applicable within the dephasing time scale.

Abstract

We propose a universal analytical method to study the dynamics of a multi-anticrossing system subject to driving by one single large-amplitude triangle pulse, within its time scales smaller than the dephasing time. Our approach can explain the main features of the Landau-Zener-Stuckelberg interference patterns recently observed in a tripartite system [Nature Communications 1:51 (2010)]. In particular, we focus on the effects of the size of anticrossings on interference and compare the calculated interference patterns with numerical simulations. In addition, Fourier transform of the patterns can extract information on the energy level spectrum.