Single-photon interference in sidebands of phase-modulated light for quantum cryptography

Authors
Merolla, JM Mazurenko, Y Goedgebuer, JP Rhodes, WT
Citation
Jm. Merolla et al., Single-photon interference in sidebands of phase-modulated light for quantum cryptography, PHYS REV L, 82(8), 1999, pp. 1656-1659
Citations number
18
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
82
Issue
8
Year of publication
1999
Pages
1656 - 1659
Database
ISI
SICI code
0031-9007(19990222)82:8<1656:SIISOP>2.0.ZU;2-L
Abstract
We report single-photon interference in the sidebands of modulated light. T he relative phase of interacting quantum stares is reliably controlled by t he phase of a low-frequency modulating signal. We show how this type of int erference can be used to build a robust system for quantum cryptography. An experiment was implemented at 1540 nm, over a 20-km-long standard single-m ode fiber, using a germanium singlephoton avalanche photodiode.