Novel Nonclassical-light-assisted Protocols for Quantum Key Distribution

Abstract

During our Phase I period of performance, we have investigated a competing technology to the decoy-state protocol for QKD (quantum key distribution) based on the use of entangled light pulses randomly mixed with Weak Laser Pulses (WLP), the so-named NCBB84 protocols, where the WLP are used exactly as in the standard BB84 (Bennett & Brassard 1984) protocol. Our theoretical work has identified a number of promising NCBB84 candidates, among which is the entangled decoy state protocol, which at this moment appears optimal. The entangled decoy state approach is especially promising from a practical standpoint because it allows a homodyne detection scheme to be used as opposed to photon-number-counting detectors needed by the standard decoy-state approach. Consequently, detectors with much higher efficiencies and lower dark-count rates can be used with our new scheme, increasing the key generation rate.

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Document Details

Document Type
Technical Report
Publication Date
Jan 30, 2011
Accession Number
ADA566140

Entities

People

  • Jonathan Dowling
  • Ulvi Yurtsever

Tags

DTIC Thesaurus Topics

  • Coding
  • Cryptography
  • Detectors
  • Frequency
  • Homodyne Detection
  • Laser Pulses
  • Measurement
  • Probability
  • Quantum Computing
  • Quantum Cryptography
  • Quantum Information
  • Quantum Information Science
  • Quantum Key Distribution
  • Quantum Mechanics
  • Quantum Memories
  • Secure Communications
  • Standards

Fields of Study

  • Physics

Readers

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  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.

Technology Areas

  • Directed Energy
  • Quantum Computing
  • Quantum Science - Quantum Key Distribution