Active control of qubit-qubit entanglement evolution

TL;DR

This paper presents a method for actively controlling the entanglement evolution between two qubits by designing the time dependence of their coupling, enabling precise manipulation of quantum entanglement dynamics.

Contribution

It introduces an explicit solution for determining the coupling's time dependence from a desired entanglement evolution, advancing quantum control techniques.

Findings

Explicit solution for inverse entanglement control problem

Applicable to various physical qubit implementations

Potential for precise entanglement management in quantum computing

Abstract

In this work, we propose a scheme to design the time evolution of the entropy of entanglement between two qubits. It is shown an explicit accurate solution for the inverse problem of determining the time dependence of the coupling constant from a user-defined dynamical entanglement function. Such an active control of entanglement can be implemented in many different physical implementations of coupled qubits, and we briefly comment on the use of interacting flux qubits.