Coherent State Control of Non-Interacting Quantum Entanglement

TL;DR

This paper introduces a new approximation method for controlling entanglement dynamics in two-level quantum systems using coherent states, applicable over long times and strong control fields.

Contribution

It provides a compact formula for entanglement evolution parameters, accounting for both discrete and continuous quantum variables, enhancing control precision.

Findings

Predicts entanglement revival heights and timings

Applicable to long-time and strong-control regimes

Accounts for both discrete and continuous degrees of freedom

Abstract

We exploit a novel approximation scheme to obtain a new and compact formula for the parameters underlying coherent-state control of the evolution of a pair of entangled two-level systems. It is appropriate for long times and for relatively strong external quantum control via coherent state irradiation. We take account of both discrete-state and continuous-variable degrees of freedom. The formula predicts the relative heights of entanglement revivals and their timing and duration.