Work

Multipartite quantum nonlocality under local decoherence

Year: 2012

Type: article

Abstract: We study the nonlocal properties of two-qubit maximally entangled and $N$-qubit Greenberger-Horne-Zeilinger states under local decoherence. We show that the (non)resilience of entanglement under local depolarization or dephasing is not necessarily equivalent to the (non)resilience of Bell-inequality violations. Apart from entanglement and Bell-inequality violations, we consider also nonlocality as quantified by the nonlocal content of correlations and provide several examples of anomalous behaviors, both in the bipartite and multipartite cases. In addition, we study the practical implications of these anomalies on the usefulness of noisy Greenberger-Horne-Zeilinger states as resources for nonlocality-based physical protocols given by communication complexity problems.

Source: Physical Review A

DOI: 10.1103/physreva.86.012108

Authors: R. Chaves, D. Cavalcanti, L. Aolita, A. Acín

Institutions: Universidade Federal do Rio de Janeiro, Institute of Photonic Sciences, Centre for Quantum Technologies, Institució Catalana de Recerca i Estudis Avançats

Language: English

Topic: Quantum Mechanics and Applications

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Agence Nationale de la Recherche

Award: G125160087