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Quantum Communications

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Displaying 101 - 106 of 106

High-efficiency, ultra-low-noise all-fiber photon pair source

June 20, 2008

Author(s)

Shellee D. Dyer, Martin J. Stevens, Burm Baek, Sae Woo Nam

We demonstrate an all-fiber photon pair source with the highest coincidence-to-accidental ratio (CAR) reported to date in the fiber optic telecom C-band. We achieve this through careful optimization of pair production efficiency as well as careful

Characterization of fiber-generated entangled photon pairs with superconducting single-photon detectors

February 5, 2007

Author(s)

Chuang Liang, Fook L. Kim, Milja Medic, Prem Kumar, Robert Hadfield, Sae Woo Nam

We demonstrate the suitability of fiber-generated entangled photon pairs for practical quantum communications in the telecom band by measuring their properties with superconducting single-photon detectors that produce negligible dark counts. The photon

Introduction to Journal of Modern Optics Special Issue on Single Photon: Sources, Detectors, Applications and Measurement Methods

January 20, 2007

Author(s)

J Cheung, Alan L. Migdall, Stefania Castelletto

In October 2005, a 2-day follow up workshop, Single photon: sources, detectors, applications and measurement methods, was held at the NPL (National Physical Laboratory, UK). The focus for this workshop was to report on the key developments since the

Demonstration of a Low-Noise Near-Infrared Photon Counter with Multiphoton Discrimination

July 28, 2003

Author(s)

Aaron J. Miller, Sae Woo Nam, John M. Martinis, A. Sergeinko

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

Tungsten Transition-Edge Sensors for IR/Optical/UV Photon Counting

June 1, 2003

Author(s)

Aaron J. Miller, Sae Woo Nam, John M. Martinis, Alexander V. Sergienko

Tungsten transition-edge sensors have been demonstrated to have impressive photon-counting capabilities. Of particular interest is the expected impact to the applications of low-flux astronomy and photonic quantum information. The combination of high

Quantum Computing and Communication

June 28, 2002

Author(s)

Paul E. Black, David R. Kuhn, Carl J. Williams

A quantum computer, if built, will be to an ordinary computer as a hydrogen bomb is to gunpowder, at least for some types of computations. Today no quantum computer exists, beyond laboratory prototypes capable of solving only tiny problems, and many

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