Quantum Communication Using Macroscopic Phase Entangled States

Abstract

This final report describes the accomplishments of the program after 36 months of funding. A new long-range QKD protocol was proposed and its security was investigated. A pulsed Sagnac interferometer for single-shot phase shift measurements was investigated but not completed due to technical difficulties. Other methods for producing single-photon nonlinear phase shifts were investigated. Randomly-chosen unitary transformations were used to decrease the mutual information available to an eavesdropper. Several nonlinear effects were demonstrated using metastable xenon in a high-finesse cavity, including a nonlinear cross-phase shift. The nonlinear phase shifts were enhanced. Other techniques for long-range secure quantum communications were investigated based on the use of a small amount of shared prior key.

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Document Details

Document Type
Technical Report
Publication Date
Dec 10, 2015
Accession Number
AD1004896

Entities

People

  • James D. Franson

Organizations

  • University of Maryland

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Amplifiers
  • Computers
  • Death
  • Information Processing
  • Interferometers
  • Interferometry
  • Laser Beams
  • Lasers
  • Optical Fibers
  • Optics
  • Phase Shift
  • Quantum Computers
  • Quantum Computing
  • Quantum Information
  • Quantum Key Distribution
  • Quantum Mechanics
  • Secure Communications

Fields of Study

  • Physics

Readers

  • Optical Physics and Photonics.
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.

Technology Areas

  • Quantum Computing
  • Quantum Science - Quantum Key Distribution