Clock synchronization by remote detection of correlated photon pairs

Abstract

We present an algorithm to detect the time and frequency difference of independent clocks based on observation of time-correlated photon pairs. This enables remote coincidence identification in entanglement-based quantum key distribution schemes without dedicated coincidence hardware, pulsed sources with a timing structure or very stable reference clocks. We discuss the method for typical operating conditions, and show that the requirement in reference clock accuracy can be relaxed by about 5 orders of magnitude in comparison with previous schemes.

14 pages, 6 figures

References in corpus (10)

• Device-independent security of quantum cryptography against collective attacks
• Free-Space distribution of entanglement and single photons over 144 km
• Quantum Cryptography with Entangled Photons
• A wavelength-tunable fiber-coupled source of narrowband entangled photons
• Practical Quantum Key Distribution with Polarization-Entangled Photons
• Quantum Cryptography
• Experimental realization of optimal asymmetric cloning and telecloning via partial teleportation
• Entangled Quantum Key Distribution Over Two Free-Space Optical Links
• Free-space quantum key distribution with entangled photons
• Collinear source of polarization-entangled photon pairs at non-degenerate wavelengths

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