Entanglement magnification induced by local manipulations

TL;DR

This paper investigates how local parameter initialization can significantly enhance the entanglement generation between two qubits under fixed unitary evolution, revealing a strict interconnection between local and non-local dynamics.

Contribution

It demonstrates that entanglement can be magnified through strategic initial energy settings, even without ongoing local control during evolution.

Findings

Entanglement can be strongly increased by initial energy configuration.

Local and non-local dynamics are strictly interconnected.

Enhancement occurs without modifying local parameters during evolution.

Abstract

We study the entanglement capability of the evolution of a pair of qubits evolving under unitary dynamics, when the local dynamical parameters cannot be modified during the time-evolution. Unlike the fast local control regime, we find that local and non-local contributions to the dynamics are strictly interconnected. Moreover, it is possible to strongly increase the entanglement capability by suitably initializing the characteristic energies of the two parties.