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Environment mediated multipartite and multidimensional entanglement.

ABSTRACT: Quantum entanglement is usually considered a fragile quantity and decoherence through coupling to an external environment, such as a thermal reservoir, can quickly destroy the entanglement resource. This doesn't have to be the case and the environment can be engineered to assist in the formation of entanglement. We investigate a system of qubits and higher dimensional spins interacting only through their mutual coupling to a reservoir. We explore the entanglement of multipartite and multidimensional system as mediated by the bath and show that at low temperatures and intermediate coupling strengths multipartite entanglement may form between qubits and between higher spins, i.e., qudits. We characterise the multipartite entanglement using an entanglement witness based upon the structure factor and demonstrate its validity versus the directly calculated entanglement of formation, suggesting possible experiments for its measure.

SUBMITTER: Lee CK

PROVIDER: S-EPMC6591356 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature

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Environment mediated multipartite and multidimensional entanglement.

Lee Chee Kong CK Najafabadi Mojdeh S MS Schumayer Daniel D Kwek Leong Chuan LC Hutchinson David A W DAW

Scientific reports 20190624 1

Quantum entanglement is usually considered a fragile quantity and decoherence through coupling to an external environment, such as a thermal reservoir, can quickly destroy the entanglement resource. This doesn't have to be the case and the environment can be engineered to assist in the formation of entanglement. We investigate a system of qubits and higher dimensional spins interacting only through their mutual coupling to a reservoir. We explore the entanglement of multipartite and multidimensi ...[more]

PMID: 31235826

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