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

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.

5+4 pages, 5 figures

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• Topological energy pumping in a quasi-periodically driven four-level system
• Emergence of prethermal time quasicrystalline order in a quasiperiodically driven non-interacting spin chain
• Anomalous parametric resonance in a spin-1/2 chain: dynamical effects of nontrivial topology
• Non-abelian Geometric Quantum Energy Pump