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Displaying records 551 to 560 of 789 records.
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551. Optical and microwave frequency synthesis with an integrated fiber frequency comb
Topic: Physics
Published: 5/21/2006
Authors: L Hartl, Martin E. Fermann, W Swann, John J. McFerran, Ian R Coddington, Qudsia Quraishi, Scott A Diddams, Nathan Reynolds Newbury, Carston Langrock, M M Fejer, P. S. Westbrook, Jeffrey W. Nicholson, K Feder
Abstract: We demonstrate optical coherence over a broad spectral range of two independent fiber frequency combs. Additionally, we demonstrate microwave stability of better than 2x10^u-14^ in 1 second for an optically integrated fiber frequency comb.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50363

552. High resolution analysis of the 26 and 2 9 9 bands of propane
Topic: Physics
Published: 5/8/2006
Authors: Jean-Marie Flaud, Walter Joseph Lafferty, F. Kwabia Tchana
Abstract: Using high-resolution Fourier transform spectra of propane recorded in the 13.4 μm (resolution of 0.002 cm-1) and in the 27.4 μm (resolution 0.0011 cm-1) spectral regions, it was possible to perform a thorough assignment of both the ν ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903598

553. Recent experiments in trapped-ion quantum information processing at NIST
Topic: Physics
Published: 5/1/2006
Authors: J Chiaverini, Matthew P. Barrett, Brad Rodney Blakestad, Joseph Wright Britton, Wayne M Itano, John D. Jost, Emanuel H Knill, C. Langer, Dietrich G Leibfried, R Ozeri, T 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=841893

554. 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

555. 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

556. 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

557. 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

558. 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

559. 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

560. 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



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