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Topic Area: Physics

Displaying records 521 to 530 of 774 records.
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521. Introduction to Journal of Modern Optics Special Issue on Single Photon: Sources, Detectors, Applications and Measurement Methods
Topic: Physics
Published: 1/20/2007
Authors: J Cheung, Alan L Migdall, Stefania Castelletto
Abstract: 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 ...

522. Key Elements of Preparing Emergency Responders for Nuclear and Radiological Terrorism
Topic: Physics
Published: 12/1/2006
Authors: S Becker, B Bruddemeier, J Bushberg, J Cardarelli, W Conklin, B Dodd, J M Frazier, F Fong, R Goans, I Hamilton, R Kouzes, J M Links, P Liotta, F Mettler, T Pellmar, Leticia S Pibida, M Puzziferri, C Riland, J Ring, T Seed, J Smith, R Whitcomb

523. Remote Time Calibrations via the NIST Measurement and Analysis Service
Topic: Physics
Published: 12/1/2006
Authors: Michael A Lombardi, Andrew N Novick
Abstract: NIST now offers a new remmote calibration service desinged to assist laboratories who maintain an accurate local time standard. The service monitors the local time standard by continuously comparing it to the national time standard, and reports the c ...

524. Wake Fields in the Electron Gas, Including Transverse Response
Topic: Physics
Published: 12/1/2006
Authors: Eric J Cockayne, Zachary H Levine

525. Perspectives on the quantum Zeno paradox
Topic: Physics
Published: 11/7/2006
Author: Wayne M Itano
Abstract: As of October 2006, there were approximately 535 citations to the seminal 1977 paper of Misra and Sudarshan which pointed out the quantum Zeno paradox (more often called the quantum Zeno effect). In simple terms, the quantum Zeno effect refers to a s ...

526. System-Level Integration of a Chip-Scale Atomic Clock: Microwave Oscillator and Physics Package
Topic: Physics
Published: 11/7/2006
Authors: Alan Brannon, Vladislav Gerginov, Svenja A Knappe, Z Popovic, John E Kitching
Abstract: We report on our progress in developing a prototype Chip-Scale Atomic Clock with the integration of the local oscillator and the physics package. A discussion of the design and results is given with a focus on frequency stability, size, and power con ...

527. Continuous light shift correction in modualted coherent opoulation trapping clocks
Topic: Physics
Published: 10/13/2006
Authors: V Shah, Vladislav Gerginov, P Schwindt, Svenja A Knappe, Leo W. Hollberg, John E Kitching
Abstract: We demonstrate a simple technique to significantly improve the long term frequency stability of atomic clocks based on coherent population trapping (CPT). In this technique, the CPT feilds are created by a modulated diode laser and a slow servo is us ...

528. Elimination of two level fluctuators in superconducting quantum bits by an epitaxial tunnel barrier
Topic: Physics
Published: 9/7/2006
Authors: Seongshik Oh, Katarina Cicak, Jeffrey S. Kline, Mika Sillanpaa, Jed Douglas Whittaker, Raymond Wiley Simmonds, David P Pappas, Kevin Osborn
Abstract: Quantum computing based on Josephson junction technology is considered promising due to its scalable architecture. However, decoherence is a major obstacle. Here, we report evidence for improved Josephson quantum bits qubits using a single-crystal ...

529. Characterization and Calibration of an Optical Time Domain Reflectometer Calibrator
Topic: Physics
Published: 8/23/2006
Authors: Donald R Larson, Nicholas G Paulter Jr, Kenneth C Blaney
Abstract: We report the results of an investigation into the signal characteristics and behavior of an instrument used to calibrate Optical Time Domain Reflectometers. This instrument implements the Telecommunications Industry Association standard TIA/EIA-455- ...

530. A compact phase delay technique for increasing the amplitude of coherent population trapping resonances in open Lambda systems
Topic: Physics
Published: 8/1/2006
Authors: V Shah, Svenja A Knappe, P Schwindt, Vladislav Gerginov, John E Kitching, Leo W. Hollberg
Abstract: We propose and demonstrate a novel technique for increasing the amplitude of coherent population trapping (CPT) resonance in open Lambda systems. The technique requires no complex modifications to the conventional CPT setup and is compatible with sta ...

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