Work

Out-of-Time-Order Correlators as Indicators of Entropy in the Quantum Kicked Rotor

Year: 2026

Type: article

Abstract: We show that Out-of-Time-Ordered Correlator (OTOC) growth in the Quantum Kicked Rotor (QKR) quantifies information scrambling rather than entropy production. Numerical simulations reproduce the quadratic OTOC scaling at resonance (ℏeff=4π) and its suppression under detuning. Bitstreams derived from the evolving wavefunction reveal a nonmonotonic relationship between chaos and entropy: the resonant (maximally chaotic) regime exhibits lower measured entropy due to coherent phase correlations, whereas slight detuning enhances statistical uniformity. While Out-of-Time-Ordered Correlators quantify information scrambling rather than entropy production, we show that the strength of scrambling strongly constrains the amount of classical entropy that can be extracted after measurement.

Source: Computers

DOI: 10.3390/computers15010023

Authors: Taukhid W. Broto, Supriadi Rustad, Ahmad Zainul Fanani, Sri Winarno, De Rosal Ignatius Moses Setiadi

Institutions: Universitas Dian Nuswantoro, Politeknik Industri Furnitur dan Pengolahan Kayu

Language: English

Topic: Quantum chaos and dynamical systems

Subfield: Statistical and Nonlinear Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,172

Funder: Direcció General de Recerca, Generalitat de Catalunya