Entanglement dynamics of two qubits under the influence of external kicks and Gaussian pulses

TL;DR

This paper explores how external magnetic fields in the form of kicks and Gaussian pulses influence the entanglement dynamics of two spin-1/2 qubits, revealing methods to generate high entanglement through specific sequences.

Contribution

It provides an analytical and numerical study of entanglement evolution under external kicks and pulses, highlighting the Dyson time ordering effect and entanglement control strategies.

Findings

Dyson time ordering significantly affects entanglement dynamics.

High entanglement can be achieved with carefully designed external sequences.

Analytical and numerical methods complement each other in this study.

Abstract

We have investigated the dynamics of entanglement between two spin-1/2 qubits that are subject to independent kick and Gaussian pulse type external magnetic fields analytically as well as numerically. Dyson time ordering effect on the dynamics is found to be important for the sequence of kicks. We show that "almost-steady" high entanglement can be created between two initially unentangled qubits by using carefully designed kick or pulse sequences.