Work

Quantum Nonlocality Does Not Imply Entanglement Distillability

Year: 2012

Type: article

Abstract: Entanglement and nonlocality are both fundamental aspects of quantum theory, and play a prominent role in quantum information science. The exact relation between entanglement and nonlocality is, however, still poorly understood. Here we make progress in this direction by showing that, contrary to what previous work suggested, quantum nonlocality does not imply entanglement distillability. Specifically, we present analytically a 3-qubit entangled state that is separable along any bipartition. This implies that no bipartite entanglement can be distilled from this state, which is thus fully bound entangled. Then we show that this state nevertheless violates a Bell inequality. Our result also disproves the multipartite version of a long-standing conjecture made by Peres.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.108.030403

Authors: Tamás Vértesi, Nicolas Brunner

Institutions: HUN-REN Institute for Nuclear Research, Hungarian Academy of Sciences, University of Bristol

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

Funders: Agence Nationale de la Recherche, Engineering and Physical Sciences Research Council

Awards: G125160087, Device-Independent Quantum Information Processing, G6531262569