Satisfying the Einstein-Podolsky-Rosen criterion with massive particles

J. Peise; I. Kruse; K. Lange; B. Lücke; L. Pezzè; J. Arlt; W. Ertmer; K. Hammerer; L. Santos; A. Smerzi; C. Klempt

doi:10.1117/12.2209557

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4 March 2016 Satisfying the Einstein-Podolsky-Rosen criterion with massive particles

J. Peise, I. Kruse, K. Lange, B. Lücke, L. Pezzè, J. Arlt, W. Ertmer, K. Hammerer, L. Santos, A. Smerzi, C. Klempt

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Proceedings Volume 9764, Complex Light and Optical Forces X; 976408 (2016) https://doi.org/10.1117/12.2209557
Event: SPIE OPTO, 2016, San Francisco, California, United States

Abstract

In 1935, Einstein, Podolsky and Rosen (EPR) questioned the completeness of quantum mechanics by devising a quantum state of two massive particles with maximally correlated space and momentum coordinates. The EPR criterion qualifies such continuous-variable entangled states, as shown successfully with light fields. Here, we report on the production of massive particles which meet the EPR criterion for continuous phase/amplitude variables. The created quantum state of ultracold atoms shows an EPR parameter of 0.18(3), which is 2.4 standard deviations below the threshold of 1/4. Our state presents a resource for tests of quantum nonlocality with massive particles and a wide variety of applications in the field of continuous-variable quantum information and metrology.

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J. Peise, I. Kruse, K. Lange, B. Lücke, L. Pezzè, J. Arlt, W. Ertmer, K. Hammerer, L. Santos, A. Smerzi, and C. Klempt "Satisfying the Einstein-Podolsky-Rosen criterion with massive particles", Proc. SPIE 9764, Complex Light and Optical Forces X, 976408 (4 March 2016); https://doi.org/10.1117/12.2209557

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