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Topic Area: Physics

Displaying records 501 to 510 of 733 records.
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501. 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

502. 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

503. 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

504. 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

505. 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

506. 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

507. 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

508. Rotating-radio-frequency ion traps
Topic: Physics
Published: 10/20/2005
Authors: T Hasegawa, John J Bollinger
Abstract: We propose a new ion trap, the rotating-rf trap, in which motion of a charged particle is described not by Mathieu-type functions but by trigonometric functions. In the rotating-rf trap, a quadrupole electric field confines charged particles, whereas ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50171

509. Surface-Electrode Architecture for Ion-Trap Quantum Information Processing
Topic: Physics
Published: 9/1/2005
Authors: J Chiaverini, Brad Rodney Blakestad, Joseph Wright Britton, John D. Jost, C. Langer, Dietrich G Leibfried, R Ozeri, David J Wineland
Abstract: We investigate a surface-mounted electrode geometry for miniature linear radio frequency Paul ion traps. The electrodes reside in a single plane on a substrate, and the pseudopotential minimum of the trap is located above the substrate at a distance ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50014

510. A Polarizable Model for Ethylene Oxide
Topic: Physics
Published: 6/18/2005
Author: Raymond Dale Mountain
Abstract: A series of interaction models for ethylene oxide are developed for use in molecular simulation of the thermal properties of both the gas and liquid phases. While it is possible to develop nonpolarizable models to accurately generate either the gas ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=832056



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