Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Experimental observation of counter-intuitive features of photonic bunching.

Light, science & applications·2026
Same author

High-efficiency free-space optical communication link with refractive adaptive optics.

Optics express·2026
Same author

Philadelphia Chromosome-Positive B-cell Acute Lymphoblastic Leukemia: A Case Report.

Cureus·2026
Same author

Unquestionable Bell Theorem for Interwoven Frustrated Downconversion Processes.

Physical review letters·2026
Same author

Randomness certification in a quantum network with independent sources.

Science advances·2026
Same author

Non-degenerate SPDC photon-pair source for UV-A illumination.

Optics express·2025

Related Experiment Video

Updated: Apr 6, 2026

Implementation of a Reference Interferometer for Nanodetection
16:11

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

9.9K

Postselection-Loophole-Free Bell Test Over an Installed Optical Fiber Network.

Gonzalo Carvacho1,2,3, Jaime Cariñe2,3,4, Gabriel Saavedra2,3,4

  • 1Departamento de Física, Universidad de Concepción, 160-C Concepción, Chile.

Physical Review Letters
|August 1, 2015
PubMed
Summary

Researchers demonstrated a loophole-free violation of Bell inequalities using energy-time entangled photons over 3.7 km of optical fiber. This advances secure quantum communication by overcoming previous experimental limitations in fiber-based tests.

More Related Videos

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
09:43

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

10.4K
Fabrication and Characterization of Disordered Polymer Optical Fibers for Transverse Anderson Localization of Light
09:19

Fabrication and Characterization of Disordered Polymer Optical Fibers for Transverse Anderson Localization of Light

Published on: July 29, 2013

12.0K

Related Experiment Videos

Last Updated: Apr 6, 2026

Implementation of a Reference Interferometer for Nanodetection
16:11

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

9.9K
Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
09:43

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

10.4K
Fabrication and Characterization of Disordered Polymer Optical Fibers for Transverse Anderson Localization of Light
09:19

Fabrication and Characterization of Disordered Polymer Optical Fibers for Transverse Anderson Localization of Light

Published on: July 29, 2013

12.0K

Area of Science:

  • Quantum Information Science
  • Quantum Communication
  • Experimental Quantum Physics

Background:

  • Device-independent quantum communication necessitates loophole-free Bell inequality violations.
  • Energy-time entangled photons are suitable for optical fiber communication due to their robustness.
  • Previous in-field long-distance experiments with energy-time entanglement were affected by the postselection loophole.

Purpose of the Study:

  • To demonstrate a loophole-free violation of the Clauser-Horne-Shimony-Holt Bell inequality.
  • To utilize energy-time entangled photons for secure quantum communication over deployed optical fiber infrastructure.
  • To overcome the postselection loophole in long-distance, in-field Bell tests.

Main Methods:

  • Utilized energy-time entangled photons for quantum communication.
  • Transmitted entangled photons over a 3.7 km deployed optical fiber network.
  • Performed measurements to test the Clauser-Horne-Shimony-Holt Bell inequality.

Main Results:

  • Achieved a violation of the Clauser-Horne-Shimony-Holt Bell inequality.
  • Demonstrated the first spatially separated Bell violation free of the postselection loophole in an in-field, long-distance energy-time experiment.
  • Successfully transmitted entangled photons over a 3.7 km optical fiber link.

Conclusions:

  • The experiment represents a significant advancement towards fiber-based loophole-free Bell tests.
  • The findings pave the way for secure quantum communication leveraging existing telecommunication infrastructure.
  • This work addresses key challenges in implementing robust, long-distance quantum communication protocols.