Self-similar phase diagram of the Fibonacci-driven quantum Ising model

TL;DR

This paper investigates a Fibonacci-driven quantum Ising model, revealing a self-similar phase diagram with Majorana modes, and analyzes the effects of perturbations on its temporal evolution, with implications for quantum computing.

Contribution

It introduces a novel Fibonacci-driven quantum Ising model exhibiting self-similar phase structures and identifies the governing self-similarity transform.

Findings

Phase diagram shows self-similarity with Fibonacci dynamics.

Regions with Majorana zero modes and golden-ratio modes identified.

Perturbations cause decay of boundary correlations, affecting self-similarity.

Abstract

We study a stroboscopic quantum Ising model with Fibonacci dynamics. Focusing on boundary spin correlation functions in long but finite chains, our simulations as well as analytical arguments reveal a self-similar phase diagram exhibiting regions with Majorana zero modes (MZM) as well as Majorana golden-ratio modes (MGM). We identify the self-similarity transform which governs the evolution of the phase diagram with increasing simulation time. Integrability-breaking perturbations lead to a temporal decay of the boundary spin correlations, ultimaltely limiting the self-similarity of the phase diagram. Our predictions are testable with current quantum information processors.