Oscillations in Quantum Entanglement During Rescattering

TL;DR

This paper investigates how quantum entanglement between an electron and its parent ion oscillates during rescattering in strong laser fields, revealing phase-dependent entanglement dynamics using a simple 1D model.

Contribution

It introduces a phase-sensitive analysis of entanglement oscillations during rescattering, linking them to electric field zero crossings and employing phase space methods.

Findings

Entanglement oscillates with maxima at electric field zero crossings.

Neumann entropy effectively captures entanglement dynamics.

Wigner function provides qualitative insights into quantum rescattering.

Abstract

We study the time evolution of quantum entanglement between an electron and its parent ion during the rescattering due to a strong few-cycle laser pulse. Based on a simple one-dimensional model, we compute the Neumann entropy during the process for several values of the carrier-envelope phase. The local maxima of the oscillations in the Neumann entropy coincide with the zero crossings of the electric field of the laser pulse. We employ the Wigner function to qualitatively explain the quantum dynamics of rescattering in the phase space.