Entanglement-Induced Resilience of Quantum Dynamics

TL;DR

This paper demonstrates that the natural growth of entanglement in quantum many-body systems can passively protect against noise and errors, enhancing the stability of quantum dynamics without extra error correction methods.

Contribution

It introduces a novel mechanism where entanglement growth intrinsically shields quantum dynamics from perturbations, distinct from traditional error correction or decoupling techniques.

Findings

Entanglement growth confines the impact of local perturbations.

Protection strength correlates with entanglement entropy.

Applicable to both analog simulators and control protocols.

Abstract

Quantum many-body devices suffer from imperfections that destabilize dynamics and limit scalability. We show that the dynamical growth of entanglement can intrinsically protect generic quantum dynamics against coherent and perturbative noise. Through rigorous theoretical analysis of general quantum dynamics and numerical simulations of spin chains and fermionic lattices, we prove that entanglement-entropy growth confines the influence of local Hamiltonian perturbations, thereby suppressing errors in dynamical errors. The degree of protection correlates quantitatively with the entanglement entropy of subsystems on which the perturbations act, and applies broadly to both analog quantum simulators and real-time control protocols. This entanglement-induced resilience is conceptually distinct from quantum error correction or dynamical decoupling: it passively leverages native many-body correlations without additional qubits, measurements, or control overhead. Our results reveal a generic mechanism linking entanglement growth to dynamical stability and provide practical guidelines for designing noise-resilient quantum devices.