Dynamics of genuine multipartite entanglement under local non-Markovian dephasing

TL;DR

This paper investigates how genuine multipartite entanglement in three and four-qubit states evolves under non-Markovian dephasing, revealing the GHZ state's resilience and the W state's fragility compared to random and graph states.

Contribution

It introduces a computable entanglement measure for multipartite systems and compares entanglement dynamics across different quantum states under non-Markovian noise.

Findings

GHZ state shows high resilience to non-Markovian dephasing

W state is the most fragile among studied states

Random pure and graph states exhibit distinct entanglement dynamics

Abstract

We study dynamics of genuine entanglement for quantum states of three and four qubits under non-Markovian dephasing. Using a computable entanglement monotone for multipartite systems, we find that GHZ state is quite resilient state whereas the W state is the most fragile. We compare dynamics of chosen quantum states with dynamics of random pure states and weighted graph states.