Faster entanglement driven by quantum resonance in many-body kicked rotors

TL;DR

This paper demonstrates that quantum resonance in many-body kicked rotors induces superlinear entanglement growth, with a crossover to logarithmic growth, and explores the underlying mechanisms and experimental implications.

Contribution

It reveals the superlinear entanglement production driven by quantum resonance in many-body kicked rotors and provides analytical and numerical insights into the growth dynamics.

Findings

Superlinear entanglement growth until a crossover time.

Logarithmic entanglement growth with oscillations after crossover.

High sensitivity of late-time oscillations to scaled Planck's constant.

Abstract

Quantum resonance in the paradigmatic kicked rotor system is a purely quantum effect that ignores the state of underlying classical chaos. In this work, it is shown that quantum resonance leads to superlinear entanglement production. In $N$-interacting kicked rotors set to be at quantum resonance, entanglement growth is super-linear until a crossover timescale $t^*$, beyond which growth slows down to a logarithmic form with superimposed oscillations. By mapping positional interaction to momentum space and analytically assessing the linear entropy, we unravel the mechanism driving these two distinct growth profiles. The analytical results agree with the numerical simulations performed for two- and three-interacting kicked rotors. The late time entanglement oscillation is sensitive to changes in scaled Planck's constant with a high quality factor suitable for high precision measurements. These results are amenable to an experimental realization on atom optics setup.