High-dimensional quantum key distribution using dispersive optics

Jacob Mower, Zheshen Zhang, Pierre Desjardins, Catherine Lee, Jeffrey H. Shapiro, Dirk Englund

Research output: Contribution to journalArticlepeer-review

127 Scopus citations

Abstract

We propose a high-dimensional quantum key distribution (QKD) protocol that employs temporal correlations of entangled photons. The security of the protocol relies on measurements by Alice and Bob in one of two conjugate bases, implemented using dispersive optics. We show that this dispersion-based approach is secure against collective attacks. The protocol, which represents a QKD analog of pulse position modulation, is compatible with standard fiber telecommunications channels and wavelength division multiplexers. We describe several physical implementations to enhance the transmission rate and describe a heralded qudit source that is easy to implement and enables secret-key generation at >4 bits per character of distilled key across over 200 km of fiber.

Original languageEnglish (US)
Article number062322
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume87
Issue number6
DOIs
StatePublished - Jun 20 2013
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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