Related papers: Emergent Decoherence Dynamics in Doubly Disordered Spin Networks

Emergent Decoherence Dynamics in Doubly Disordered Spin Networks

URL: http://arxiv.org/abs/2511.07785v1
Date: Wed, 12 Nov 2025 01:18:00 GMT
Title: Emergent Decoherence Dynamics in Doubly Disordered Spin Networks
Authors: Cooper M. Selco, Christian Bengs, Chaitali Shah, Zhuorui Zhang, Ashok Ajoy,
Abstract summary: We study an emergent decoherence law for nuclear polarization in a doubly disordered electron-nuclear spin network.<n>We find that disorder, typically viewed as detrimental, here proves protective, generating isolated electron-free clusters.<n>These findings establish a microscopic framework for manipulating decoherence pathways and suggest engineered disorder as a new design principle for realizing long-lived quantum memories and sensors.
Score: 0.20034473361196606
License: http://creativecommons.org/licenses/by/4.0/
Abstract: Elucidating the emergence of irreversible macroscopic laws from reversible quantum many-body dynamics is a question of broad importance across all quantum science. Many-body decoherence plays a key role in this transition, yet connecting microscopic dynamics to emergent macroscopic behavior remains challenging. Here, in a doubly disordered electron-nuclear spin network, we uncover an emergent decoherence law for nuclear polarization, $e^{-\sqrt{R_{p}t}}e^{-R_{d}t}$, that is robust across broad parameter regimes. We trace its microscopic origins to two interdependent decoherence channels: long-range interactions mediated by the electron network and spin transport within the nuclear network exhibiting anomalous, sub-diffusive dynamics. We demonstrate the capacity to control--and even eliminate--either channel individually through a combination of Floquet engineering and (optical) environment modulation. We find that disorder, typically viewed as detrimental, here proves protective, generating isolated electron-free clusters that localize polarization and prolong coherence lifetimes. These findings establish a microscopic framework for manipulating decoherence pathways and suggests engineered disorder as a new design principle for realizing long-lived quantum memories and sensors.

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