Entanglement dynamics of three-qubit states in many-sided noisy channels

TL;DR

This paper investigates how three-qubit GHZ-type entangled states evolve under local noise affecting one, two, or three qubits, revealing that their entanglement dynamics can often be understood through single-sided channel models.

Contribution

It introduces a method to describe three-qubit entanglement dynamics in many-sided noisy channels using single-sided channel evolution models.

Findings

Entanglement can be fully characterized by single-sided channel dynamics.

The lower bound for three-qubit concurrence effectively captures entanglement decay.

Entanglement dynamics depend on the number of qubits affected by noise.

Abstract

We study entanglement dynamics of pure three-qubit Greenberger-Horne-Zeilinger-type (GHZ-type) entangled states when one, two or three qubits being subjected to general local noise. Employing a lower bound for three-qubit concurrence as an entanglement measure, we show that for some many-sided noisy channels the entanglement dynamics can be complete described by the evolution of the entangled states in single-sided channels.