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Displaying records 621 to 630 of 733 records.
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621. Sympathetic Electromagnetically-Induced-Transparency Laser Cooling of Motional Modes in an Ion Chain
Topic: Physics
Published: 4/12/2013
Authors: Yiheng Lin, John P Gaebler, Ting Rei Tan, Ryan Steven Bowler, John D. Jost, Dietrich G Leibfried, David J Wineland
Abstract: We use electromagnetically-induced transparency (EIT) laser cooling to cool motional modes of a linear ion chain. As a demonstration, we apply EIT cooling on ^u24^Mg^u+^ ions to cool the axial modes of a ^u9^Be^u+^-^u24^Mg^u+^ ion pair and a ^u9^Be^u ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912751

622. Synchronization between remote sites for the MINOS experiment
Topic: Physics
Published: 11/26/2012
Authors: Stefania Romisch, Steven R Jefferts, Victor Shufang Zhang, Thomas Edward Parker, Neil Ashby, P Adamson, G. Barr, A. Habig, J Meier, C. James, R. Nicol, R. Plunkett, C. Rosenfeld, Russell Bumgarner, M. Christensen, Jonathan Hirschauer, B. Fonville, Demetrios Matsakis, Ed Powers, J. Wright, Angela Mckinley
Abstract: In the context of time-of-flight measurements, the timing at the departure and arrival locations is obviously critical to the outcome of the experiment. In the case of neutrino time-of-flight experiments, the locations are many hundreds of kilometer ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913108

623. Synchronizing Computer Clocks Using Kalman Filters
Topic: Physics
Published: 7/31/2011
Author: Judah Levine
Abstract: I have used the Kalman Filter algorithm to improve the link between the Internet Time Servers operated by the National Institute of Standards and Technology (NIST) and the primary atomic clock ensemble in Boulder, which realizes UTC(NIST) and which i ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908527

624. Synchronizing Computer Clocks by the Use of Kalman Filters
Topic: Physics
Published: 11/14/2011
Author: Judah Levine
Abstract: The National Institute of Standards and Technology (NIST) currently operates 35 public network time servers that are located at many different sites in the United States. The servers provide time messages over the public Internet in a number of diffe ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910051

625. Synthesis of ultrastable femtosecond pulse trains from an optical reference oscillator
Topic: Physics
Published: 6/1/2003
Authors: A Bartels, T M Ramond, Scott A Diddams, Leo W. Hollberg
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=105132

626. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50447

627. T-Shaped Quantum Wires in Magnetic Fields: Weakly Confined Magnetoexcitons Beyond the Diamagnetic Limit
Topic: Physics
Published: 3/1/2001
Authors: Garnett W Bryant, Y B Band
Abstract: Optical excitations of magnetoexcitons in T-shaped wires are calculated and compared with experiment. We find the single-particle states for electrons and holes confined to a wire in a magnetic field and use these states as a basis for calculations ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840935

628. Tables and Graphs of Electron-Interaction Cross Sections from 10 eV to 100 GeV Derived from the LLNL Evaluated Data Library (EEDL), Z=1-100
Topic: Physics
Published: 1/1/1991
Authors: D E Cullen, Stephen Michael Seltzer, S T Perkins
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=103605

629. Techniques for microwave near-field quantum control of trapped ions
Topic: Physics
Published: 1/31/2013
Authors: Ulrich J. Warring, C. Ospelkaus, Yves Colombe, Kenton R. Brown, Jason Amini, M Carsjens, Dietrich G Leibfried, David J Wineland
Abstract: In Ospelkaus et al. [Nature 476, 181 (2011)] a microwave near-field quantum control of spin and motional degrees of freedom of one and two 25Mg+ ions enabled two-ion entanglement. In this report, we extend on the description of the experimental setup ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912579

630. Telling Time
Topic: Physics
Published: Date unknown
Author: Jonathan E Hardis
Abstract: In Low-Tech Blues [June], you note that we are surrounded by clocks, but lament the lack of systems to set them automatically. Our job is to help fix that. Your readers can use our time servers (www. Bldrdoc.gov/timefreq/service/its.htm) to automat ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841574



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