Work

Environment mediated multipartite and multidimensional entanglement

Year: 2019

Type: preprint

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.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.1902.08320

Authors: Lee, Chee Kong, Najafabadi, Mojdeh Shikhali, Schumayer, Daniel, Kwek, Leong Chuan, Hutchinson, David A. W.

Institutions: Centre for Quantum Technologies, National University of Singapore, Massachusetts Institute of Technology, The Dodd-Walls Centre for Photonic and Quantum Technologies, University of Otago, University of Oxford

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

Funders: Tertiary Education Commission, National Research Foundation, National Research Foundation Singapore

OpenAlex ID: W2950447990

Cites: 2

Cited by: 1

Related to: 20