Dalton, B.J. (2019) Bell non-locality in macroscopic systems. European Physical Journal: Special Topics, 227(15-16), pp. 2069-2083. (doi: 10.1140/epjst/e2018-800049-4)
|
Text
178207.pdf - Published Version Available under License Creative Commons Attribution. 508kB |
Abstract
The categorization of quantum states for composite systems as either separable or entangled, or alternatively as Bell local or Bell non-local states based on local hidden variable theory is outlined, focusing on simple bipartite systems. The significance of states demonstrating Bell non-locality for settling the long standing controversy between the Copenhagen interpretation of the quantum measurement process involving “collapse of the wave-function” and the alternative interpretation based on pre-existing hidden variables is emphasized. Although experiments demonstrating violations of Bell locality in microscopic systems have now been carried out, there is current interest in finding Bell non-locality in quantum systems on a macroscopic scale, since this is a regime where a classical hidden variable theory might still apply. Progress towards finding macroscopic quantum states that violate Bell inequalities is reviewed. A new test for Bell non-locality that applies when the sub-system measured quantities are spin components with large outcomes is described, and applied to four mode systems of identical massive bosons in Bose-Einstein condensates.
Item Type: | Articles |
---|---|
Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Dalton, Professor Bryan |
Authors: | Dalton, B.J. |
College/School: | College of Science and Engineering > School of Physics and Astronomy |
Journal Name: | European Physical Journal: Special Topics |
Publisher: | Springer |
ISSN: | 1951-6355 |
ISSN (Online): | 1951-6401 |
Published Online: | 13 February 2019 |
Copyright Holders: | Copyright © 2019 The Author |
First Published: | First published in European Physical Journal: Special Topics 227(15-16): 2069-2083 |
Publisher Policy: | Reproduced under a Creative Commons License |
University Staff: Request a correction | Enlighten Editors: Update this record