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Topic Area: Physics

Displaying records 541 to 550 of 776 records.
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541. Recent experiments in trapped-ion quantum information processing at NIST
Topic: Physics
Published: 5/1/2006
Authors: J Chiaverini, Murray D Barrett, Brad Rodney Blakestad, Joseph Wright Britton, Wayne M Itano, John D. Jost, Emanuel H Knill, C. Langer, Dietrich G Leibfried, R Ozeri, Tobias Schaetz, David J Wineland
Abstract: Atomic ions confined in segmented trap arrays provide a system for quantum information processing. We report on the execution of two simple quantum algorithms, quantum error correction and the quantum Fourier transform, using this implementation. The ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50146

542. Optimization of Transition-Edge Calorimeter Performance
Topic: Physics
Published: 4/15/2006
Authors: Joel Nathan Ullom, James A Beall, William Bertrand Doriese, William Duncan, S. Lisa Ferreira, Gene C Hilton, Kent D Irwin, Galen C O'Neil, Carl D Reintsema, Leila R Vale, Barry L. Zink
Abstract: Calorimeters that exploit the superconducting-to-normal transition are used to detect individual photons from near-infrared to γ-ray wavelengths. Across this wide range, absorption efficiency, speed, and energy resolution are key performance par ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32064

543. Long-Term Frequency Instability of CPT Clocks With Microfabricated Vapor Cells
Topic: Physics
Published: 4/1/2006
Authors: Vladislav Gerginov, Svenja A Knappe, P Schwindt, V Shah, Leo W. Hollberg, John E Kitching
Abstract: We present an evaluation of the long-term frequency instability and environmental sensitivity of a chip-scale atomic clock based on coherent population trapping, particularly as affected by the light source subassembly. We find that the clock frequen ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841921

544. Direct Excitation of the Forbidden Clock Transition in Neutral ^u174^Yb Atoms Confined to an Optical Lattice
Topic: Physics
Published: 3/3/2006
Authors: Zeb Barber, C Hoyt, Christopher W Oates, Leo W. Hollberg, A. V. Taichenachev, V. I. Yudin
Abstract: We report direct single laser excitation of the strictly forbidden (6s^u2^)^u1^S^d0^ {long dash}(6s6p)^u3^P^d0^ clock transition in the even 174Yb isotope confined to a 1-D optical lattice. A small (~1.2mT) static magnetic field is used to induce a n ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50263

545. Direct Excitation of the Forbidden Clock Transition in Neutral 174Yb Atoms Confined to an Optical Lattice
Topic: Physics
Published: 3/1/2006
Authors: Zeb Barber, C Hoyt, Christopher W Oates, Leo W. Hollberg, A. V. Taichenachev, V. I. Yudin
Abstract: We report direct single laser excitation of the strictly forbidden (6s^u2^) ^s1S_0-(6s6p)^^u3^P_0 clock transition in the even 174Yb isotope confiend to a 1-D optical lattice. A small (1.2mT) static magnetic field is used to induce a non-zero electri ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841938

546. Simple Spectral Stray Light Correction Method for Array Spectroradiometers
Topic: Physics
Published: 2/20/2006
Authors: Yuqin Zong, Steven W Brown, Bettye C Johnson, Keith R Lykke, Yoshihiro Ohno
Abstract: In many applications, the measurement accuracy of spectroradiometers, particularly instruments with a single dispersive element, is limited by the presence of stray radiation within the instrument. A simple, practical method has been developed to co ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840968

547. Does Anybody Really Know What Time It Is? 24/7/365, Here's How Time Got On Your Best Side
Topic: Physics
Published: 2/1/2006
Author: Michael A Lombardi
Abstract: A magazine article that looks at the history of time signal stations, beginning with the first radio experiments in the 1890's and continuing to the present day. It discusses both shortwave time signal stations, best known for their voice announc ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50178

548. A Regenerative Frequency Comb
Topic: Physics
Published: 1/1/2006
Authors: Huascar Ascarrunz, F L. Walls, Hati a, Craig W Nelson, David Allan Howe
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=105113

549. A Summary of Lightpipe Radiation Thermometry Research at NIST
Series: Journal of Research (NIST JRES)
Report Number: 111
Topic: Physics
Published: 1/1/2006
Author: Benjamin K Tsai
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104784

550. Transfer Standard Filter Radiometers: Applications to Fundamental Scales
Topic: Physics
Published: 1/1/2006
Authors: George P Eppeldauer, Steven W Brown, Keith R Lykke
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104436



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