TITLE

Demonstration of a low-noise near-infrared photon counter with multiphoton discrimination

AUTHOR(S)
Miller, Aaron J.; Nam, Sae Woo; Martinis, John M.; Sergienko, Alexander V.
PUB. DATE
July 2003
SOURCE
Applied Physics Letters;7/28/2003, Vol. 83 Issue 4, p791
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We have demonstrated a system capable of directly measuring the photon-number state of a single pulse of light using a superconducting transition-edge sensor microcalorimeter. We verify the photon-number distribution of a weak pulsed-laser source at 1550 nm. Such single-photon metrology at telecommunication wavelengths provides the foundation for ensuring the security of photon sources used in implementations of quantum cryptography. Additionally, this system has the lowest noise equivalent power of any single-photon detector and combines high efficiency near-infrared photon counting with the ability to resolve multiphoton absorption events.
ACCESSION #
10331052

 

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