Differential-quadrature-phase-shift (DQPS) quantum key distribution

Differential-quadrature-phase-shift (DQPS) quantum key distribution

A quantum key distribution (QKD) scheme named differential-quadrature-phase-shift (DQPS) QKD is presented. A transmitter sends a weak coherent pulse train with a phase of {0, pi} {pi/2. 3pi/2} for each pulse, and a receiver measures it with either one of two delay interferometers respectively having...

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Bibliographische Detailangaben
Hauptverfasser: Inoue, K., Kukita, T., Iwai, Y., Honjo, T.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
(270.5565) Quantum Communications
(270.5568) Optical Cryptography
Delay
Detectors
Interferometers
Optical receivers
Optical transmitters
Phase detection
Protocols
Pulse measurements
Robustness
Security
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Beschreibung
Zusammenfassung:A quantum key distribution (QKD) scheme named differential-quadrature-phase-shift (DQPS) QKD is presented. A transmitter sends a weak coherent pulse train with a phase of {0, pi} {pi/2. 3pi/2} for each pulse, and a receiver measures it with either one of two delay interferometers respectively having bias phases of 0 and pi/2. The scheme introduces the idea of the BB84 protocol into differential-phase-shift (DPS) QKD, making the system robust against a sequential attack, and may guarantee the unconditional security as in BB84.
ISSN:2160-9004
DOI:10.1364/IQEC.2009.ITuI4