Entanglement-based quantum communication secured by nonlocal dispersion cancellation

Catherine Lee, Zheshen Zhang, Gregory R. Steinbrecher, Hongchao Zhou, Jacob Mower, Tian Zhong, Ligong Wang, Xiaolong Hu, Robert D. Horansky, Varun B. Verma, Adriana E. Lita, Richard P. Mirin, Francesco Marsili, Matthew D. Shaw, Sae Woo Nam, Gregory W. Wornell, Franco N.C. Wong, Jeffrey H. Shapiro, Dirk Englund

Research output: Contribution to journalArticlepeer-review

51 Scopus citations

Abstract

Quantum key distribution (QKD) enables participants to exchange secret information over long distances with unconditional security. However, the performance of today's QKD systems is subject to hardware limitations, such as those of available nonclassical-light sources and single-photon detectors. By encoding photons in high-dimensional states, the rate of generating secure information under these technical constraints can be maximized. Here, we demonstrate a complete time-energy entanglement-based QKD system with proven security against the broad class of arbitrary collective attacks. The security of the system is based on nonlocal dispersion cancellation between two time-energy entangled photons. This resource-efficient QKD system is implemented at telecommunications wavelength, is suitable for optical fiber and free-space links, and is compatible with wavelength-division multiplexing.

Original languageEnglish (US)
Article number062331
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume90
Issue number6
DOIs
StatePublished - Dec 22 2014
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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