Violation of the Cauchy-Schwarz inequality with matter waves

Kheruntsyan, K. V., Jaskula, J. -C., Deuar, P., Bonneau, M., Partridge, G. B., Ruaudel, J., Lopes, R., Boiron, D. and Westbrook, C. I. (2012) Violation of the Cauchy-Schwarz inequality with matter waves. Physical Review Letters, 108 26: 260401.1-260401.5.


Author Kheruntsyan, K. V.
Jaskula, J. -C.
Deuar, P.
Bonneau, M.
Partridge, G. B.
Ruaudel, J.
Lopes, R.
Boiron, D.
Westbrook, C. I.
Title Violation of the Cauchy-Schwarz inequality with matter waves
Journal name Physical Review Letters  (ERA 2012 Listed)    (ERA 2010 Rank A*)   Check publisher's open access policy
Publication date 2012-06-29
Sub-type Article
DOI 10.1103/PhysRevLett.108.260401
Volume number 108
Issue number 26
ISSN 0031-9007
1079-7114
Start page 260401.1
End page 260401.5
Total pages 5
Place of publication College Park, MD, United States
Publisher American Physical Society
Collection year 2013
Language eng
Abstract The Cauchy-Schwarz (CS) inequality—one of the most widely used and important inequalities in mathematics—can be formulated as an upper bound to the strength of correlations between classically fluctuating quantities. Quantum-mechanical correlations can, however, exceed classical bounds. Here we realize four-wave mixing of atomic matter waves using colliding Bose-Einstein condensates, and demonstrate the violation of a multimode CS inequality for atom number correlations in opposite zones of the collision halo. The correlated atoms have large spatial separations and therefore open new opportunities for extending fundamental quantum-nonlocality tests to ensembles of massive particles.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article # 260401

Document type: Journal Article
Sub-type: Article
Collections: School of Mathematics and Physics
Official 2013 Collection
 
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Created: Wed, 25 Jul 2012, 14:19:55 EST by Dr Karen Kheruntsyan on behalf of School of Mathematics & Physics