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Updated: Jun 8, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

Hiding single photons with spread spectrum technology.

Chinmay Belthangady1, Chih-Sung Chuu, Ite A Yu

  • 1Edward L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA. chinmayb@stanford.edu

Physical Review Letters
|September 28, 2010
PubMed
Summary
This summary is machine-generated.

This study demonstrates spread spectrum technology for single photons. It shows how to hide and recover shaped photons amidst noise.

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Area of Science:

  • Quantum optics
  • Information theory

Background:

  • Spread spectrum technology is crucial for secure communication.
  • Existing methods are limited at the single photon level.

Purpose of the Study:

  • To demonstrate spread spectrum technology at the single photon level.
  • To show photon "hiding" and recovery in noisy conditions.

Main Methods:

  • Utilized spread spectrum techniques adapted for single photon manipulation.
  • Developed methods for encoding temporal shapes onto photons.
  • Implemented noise interference and recovery protocols.

Main Results:

  • Successfully demonstrated proof-of-principle for single photon spread spectrum.
  • Showcased the ability to "hide" photons with specific temporal shapes.
  • Achieved recovery of these shaped photons in the presence of noise.

Conclusions:

  • Spread spectrum is feasible at the single photon level.
  • This technique offers potential for secure quantum communication.
  • Enables robust transmission of quantum information in noisy environments.