Scientific Results

Satisfying the Einstein-Podolsky-Rosen criterion with massive particles

Year: 2016

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

Autors Affiliation: Leibniz Univ Hannover, Inst Quantenopt, Welfengarten 1, D-30167 Hannover, Germany; INO CNR, QSTAR, Largo Enrico Fermi 2, I-50125 Florence, Italy; LENS, Largo Enrico Fermi 2, I-50125 Florence, Italy;‎ Aarhus Univ, Inst Fysik & Astron, Ny Munkegade 120, DK-8000 Aarhus C, Denmark;‎ Leibniz Univ Hannover, Inst Theoret Phys, Appelstr 2, D-30167 Hannover, Germany

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.

Conference title:

KeyWords: Bose-Einstein condensate; Einstein-Podolsky-Rosen entanglement; atomic homodyning

This site uses cookies. If you decide to continue browsing we consider that you accept their use. For more information about cookies and how to delete them please read our Info Policy on cookies use.
Read more