English

Spectral Chaos Does Not Determine Quantum Mpemba Crossings

Quantum Physics 2026-07-08 v1

Abstract

In a symmetry-restoration quantum Mpemba effect, an initial state with stronger local symmetry breaking can lose that memory faster than a state that starts closer to the symmetric manifold. We test whether this local ordering reversal is organized by chaotic thermalization in a clean U(1)-conserving spin chain, comparing spectral level statistics with crossings of the entanglement asymmetry for the same Hamiltonians. We find that Gaussian orthogonal ensemble (GOE)-like level statistics alone do not determine whether Mpemba crossings occur. Across field textures, GOE-like spectra can occur with or without entanglement-asymmetry crossings, and crossings can also appear away from the GOE reference. A near-staggered detuned control further shows that even an inversion of the total charge-sector coherence need not produce an entanglement-asymmetry crossing. Thus the crossing response is controlled not by spectral chaos alone, but by how local charge-sector coherence enters the reduced density matrix.

Cite

@article{arxiv.2607.07081,
  title  = {Spectral Chaos Does Not Determine Quantum Mpemba Crossings},
  author = {Ri-Hua Zheng and Yang Xiao and Yu Wang and Ye-Hong Chen and Yan Xia},
  journal= {arXiv preprint arXiv:2607.07081},
  year   = {2026}
}

Comments

6 pages, 4 figures; Supplemental Material included

R2 v1 2026-07-22T20:31:45.902Z