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Title: Bell-inequality tests with macroscopic entangled states of light

Abstract

Quantum correlations may violate the Bell inequalities. Most experimental schemes confirming this prediction have been realized in all-optical Bell tests suffering from the detection loophole. Experiments which simultaneously close this loophole and the locality loophole are highly desirable and remain challenging. An approach to loophole-free Bell tests is based on amplification of the entangled photons (i.e., on macroscopic entanglement), for which an optical signal should be easy to detect. However, the macroscopic states are partially indistinguishable by classical detectors. An interesting idea to overcome these limitations is to replace the postselection by an appropriate preselection immediately after the amplification. This is in the spirit of state preprocessing revealing hidden nonlocality. Here, we examine one of the possible preselections, but the presented tools can be used for analysis of other schemes. Filtering methods making the macroscopic entanglement useful for Bell tests and quantum protocols are the subject of an intensive study in the field nowadays.

Authors:
 [1];  [2]; ;  [3];  [4];  [1];  [2]
  1. Max Planck Institute for the Science of Light, Erlangen (Germany)
  2. (Germany)
  3. Group of Applied Physics, University of Geneva, Geneva (Switzerland)
  4. Faculty of Electronics and Information Technology, Warsaw University of Technology, Warsaw (Poland)
Publication Date:
OSTI Identifier:
22072223
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 84; Journal Issue: 3; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 74 ATOMIC AND MOLECULAR PHYSICS; AMPLIFICATION; BELL THEOREM; ELECTROMAGNETIC RADIATION; LOCALITY; PHOTONS; QUANTUM ENTANGLEMENT

Citation Formats

Stobinska, M., Institute for Theoretical Physics II, Erlangen-Nuernberg University, Erlangen, Sekatski, P., Gisin, N., Buraczewski, A., Leuchs, G., and Institute for Optics, Information and Photonics, Erlangen-Nuernberg University, Erlangen. Bell-inequality tests with macroscopic entangled states of light. United States: N. p., 2011. Web. doi:10.1103/PHYSREVA.84.034104.
Stobinska, M., Institute for Theoretical Physics II, Erlangen-Nuernberg University, Erlangen, Sekatski, P., Gisin, N., Buraczewski, A., Leuchs, G., & Institute for Optics, Information and Photonics, Erlangen-Nuernberg University, Erlangen. Bell-inequality tests with macroscopic entangled states of light. United States. doi:10.1103/PHYSREVA.84.034104.
Stobinska, M., Institute for Theoretical Physics II, Erlangen-Nuernberg University, Erlangen, Sekatski, P., Gisin, N., Buraczewski, A., Leuchs, G., and Institute for Optics, Information and Photonics, Erlangen-Nuernberg University, Erlangen. Thu . "Bell-inequality tests with macroscopic entangled states of light". United States. doi:10.1103/PHYSREVA.84.034104.
@article{osti_22072223,
title = {Bell-inequality tests with macroscopic entangled states of light},
author = {Stobinska, M. and Institute for Theoretical Physics II, Erlangen-Nuernberg University, Erlangen and Sekatski, P. and Gisin, N. and Buraczewski, A. and Leuchs, G. and Institute for Optics, Information and Photonics, Erlangen-Nuernberg University, Erlangen},
abstractNote = {Quantum correlations may violate the Bell inequalities. Most experimental schemes confirming this prediction have been realized in all-optical Bell tests suffering from the detection loophole. Experiments which simultaneously close this loophole and the locality loophole are highly desirable and remain challenging. An approach to loophole-free Bell tests is based on amplification of the entangled photons (i.e., on macroscopic entanglement), for which an optical signal should be easy to detect. However, the macroscopic states are partially indistinguishable by classical detectors. An interesting idea to overcome these limitations is to replace the postselection by an appropriate preselection immediately after the amplification. This is in the spirit of state preprocessing revealing hidden nonlocality. Here, we examine one of the possible preselections, but the presented tools can be used for analysis of other schemes. Filtering methods making the macroscopic entanglement useful for Bell tests and quantum protocols are the subject of an intensive study in the field nowadays.},
doi = {10.1103/PHYSREVA.84.034104},
journal = {Physical Review. A},
issn = {1050-2947},
number = 3,
volume = 84,
place = {United States},
year = {2011},
month = {9}
}