Symmetrical clock synchronization with time-correlated photon pairs

We demonstrate a point-to-point clock synchronization protocol based on bidirectionally exchanging photons produced in spontaneous parametric down conversion (SPDC). The technique exploits tight timing correlations between photon pairs to achieve a precision of 51ps in 100s with count rates of order...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2018-12
Main Authors: Lee, Jianwei, Shen, Lijiong, Cerè, Alessandro, Troupe, James, Lamas-Linares, Antia, Kurtsiefer, Christian
Format: Article
Language:English
Subjects:
Bell's inequality
Clock synchronization
Global navigation satellite system
Navigation satellites
Photons
Synchronism
Time correlation functions
Time synchronization
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We demonstrate a point-to-point clock synchronization protocol based on bidirectionally exchanging photons produced in spontaneous parametric down conversion (SPDC). The technique exploits tight timing correlations between photon pairs to achieve a precision of 51ps in 100s with count rates of order 200s\(^{-1}\). The protocol is distance independent, secure against symmetric delay attacks and provides a natural complement to techniques based on Global Navigation Satellite Systems (GNSS). The protocol works with mobile parties and can be augmented to provide authentication of the timing signal via a Bell inequality check.
ISSN:2331-8422