Microscopic Origin of Domain Wall Reconfiguration Dynamics in a Quantum Material via Quantum Simulation

• URL: http://arxiv.org/abs/2508.20028v1
• Date: Wed, 27 Aug 2025 16:33:03 GMT
• Title: Microscopic Origin of Domain Wall Reconfiguration Dynamics in a Quantum Material via Quantum Simulation
• Authors: Jaka Vodeb,
• Abstract summary: In quantum materials 1T-TaS$$, domain-wall-rich polaronic textures evolve toward a uniform ground state through reconfiguration events.<n>We employ quantum simulation of a two-dimensional transverse-field Ising model to uncover the microscopic processes underlying this relaxation.<n>Our results establish quantum simulation as a powerful tool for inferring real-space mechanisms in strongly correlated systems.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Understanding how quantum materials relax from metastable states poses a fundamental challenge in condensed matter physics. In the layered dichalcogenide 1T-TaS$_2$, domain-wall-rich polaronic textures evolve toward a uniform ground state through reconfiguration events that exhibit a crossover from thermally activated to temperature-independent behavior-indicative of quantum tunneling. Here, we employ quantum simulation of a two-dimensional transverse-field Ising model (TFIM) with longitudinal bias to uncover the microscopic processes underlying this relaxation. Using a Schrieffer-Wolff transformation, we map the TFIM to a hardcore boson model, revealing that single-polaron tunneling events, rather than collective multi-particle transitions, dominate domain wall motion. A scaling analysis of reconfiguration rates across varying transverse fields $h_x$ shows collapse when temperature is rescaled as $T \to h_x^n T$ with $n \approx 1.2$, confirming the dominance of first- and second-order single-particle processes. This enables us to reconstruct a microscopic relaxation pathway consisting of cyclical polaron leakage followed by cascades of tunneling events. Our results establish quantum simulation as a powerful tool for inferring real-space mechanisms in strongly correlated systems and demonstrate a concrete strategy for bridging effective spin models with the non-equilibrium dynamics of quantum materials.

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