Explicit contextualized hidden-variable model replicating an indivisible quantum system

Autor(en)

William N. Plick, Radek Lapkiewicz

Abstrakt

Recent experiments and theory have further illuminated the concept of "quantum contextuality." In this paper we take an inequality-the pentagram (or KCBS) inequality, which is violated by an unentangled spin-1 system-and given a relaxed assumption of noncontextuality show that a hidden-variable model may be constructed that replicates exactly the quantum bound. This is in contrast to the case of an entangled pair of spin-1/2 particles where a similar relaxation of the assumption of locality does not lead to a replication of the quantum bound. Some reasons are proposed for why this may be the case.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

Österreichische Akademie der Wissenschaften (ÖAW)

Journal

Physical Review A

Band

89

Anzahl der Seiten

5

ISSN

1050-2947

DOI

https://doi.org/10.1103/PhysRevA.89.022108

Publikationsdatum

02-2014

Peer-reviewed

Ja

ÖFOS 2012

103026 Quantenoptik

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/51e774aa-34d0-49dc-b5ec-eda62a8c5576