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arXiv · 2510.14740

On Krylov Complexity as a Probe of the Quantum Mpemba Effect

Mohsen Alishahiha·Mohammad Javad Vasli
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Abstract

We investigate Krylov state complexity as a probe of the quantum Mpemba effect in quantum spin chains. For models without global $U(1)$ symmetry, Krylov complexity exhibits clear Mpemba-like crossings, consistent with conventional diagnostics such as the trace distance, while offering a complementary interpretation in terms of Hilbert-space exploration and dynamical delocalization. In $U(1)$-symmetric systems, we confirm that the recently proposed symmetric component of Krylov complexity serves as a robust and reliable indicator of the QME, capturing anomalous relaxation even in cases where the total complexity fails to do so.

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Mohsen Alishahiha, Mohammad Javad Vasli. 2025-10-16. On Krylov Complexity as a Probe of the Quantum Mpemba Effect. https://arxiv.org/abs/2510.14740

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