Out-of-Time-Order Correlators as Indicators of Entropy in the Quantum Kicked Rotor
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.
Fields of Study & Subjects
Quantum many-body systems
Quantum chaos and dynamical systems
stochastic dynamics and bifurcation
Publication details
- Journal / source
- Computers
- Publisher
- MDPI AG
- Volume
- 15
- Issue
- 1
- Pages
- 23–23
- Publication date
- 5 January 2026
- Language
- EN