Year: 2025
Type: preprint
Abstract: We study thermalization within a quantum system with an enhanced capacity to store information. This system has been recently introduced to provide a prototype model of how a black hole processes and stores information. We perform a numerical finite-size analysis of this isolated quantum system and find indications that its information-carrying subsystem approaches thermality in the large system-size limit. The results lead us to suggest a novel thermalization mechanism. The corresponding distinguishing characteristic is that for a large class of physically meaningful non-equilibrium initial states $| \text{in} \rangle$, a few-body observable $\hat{A}$ thermalizes despite unignorable correlations between the fluctuations of its eigenstate expectation values $\langle α| \hat{A} | α\rangle$ in the eigenstate basis of the model $\left\{ | α\rangle \right\}$ and the fluctuations of the squared magnitudes of the coefficients $|C_α|^2 = |\langle α| \text{in} \rangle |^2$.
Source: arXiv (Cornell University)
Author: Kaikov, Oleg
Language: English
Topic: Quantum many-body systems
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4417233340
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