Conclusive Entangling Probe

Abstract

A design is given for an optimized entangling probe attacking the BB84 (Bennett-Brassard 1984) protocol of quantum key distribution and yielding maximum information to the probe for a full range of induced error rates. Probe photon polarization states become optimally entangled with the signal states on their way between the legitimate transmitter and receiver. Although standard von-Neumann projective measurements of the probe yield maximum information on the pre-privacy amplified key if instead the probe measurements are performed with a certain positive operator valued measure, then the measurement results are conclusive, at least some of the time, for a full range of inconclusive rates.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 2008
Accession Number
ADA522724

Entities

People

  • Howard E. Brandt

Organizations

  • United States Army Research Laboratory

Tags

DTIC Thesaurus Topics

  • Hilbert Space
  • Information Operations
  • Linear Polarization
  • Losses
  • Mathematics
  • Measurement
  • Military Research
  • Photodetectors
  • Polarization
  • Polarizers
  • Quantum Key Distribution
  • Repetition Rate
  • Standards
  • Transmitters
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Mathematics or Statistics
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.

Technology Areas

  • Quantum Computing
  • Quantum Science - Quantum Key Distribution