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Topic Area: Physics
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Displaying records 41 to 50 of 733 records.
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41. Measuring the Half-Life of 111mPd
Topic: Physics
Published: 11/12/2013
Authors: Richard Mark Lindstrom, Dagistan Sahin

42. Cold-atom double-lambda coherent population trapping clock
Topic: Physics
Published: 10/31/2013
Authors: Elizabeth A Donley, Francois-Xavier R. Esnault, Eric Michael Blanshan, Eugene N Ivanov, Robert E. Scholten, John E Kitching
Abstract: Miniature atomic clocks based on coherent population trapping (CPT) states in thermal atoms are emerging as an important component in many field applications, particularly where satellite frequency standards are not accessible. Cold-atom CPT clocks p ...

43. Detection of {Beta}-mode polarization in the cosmic microwave background with data from the south pole telescope
Topic: Physics
Published: 9/30/2013
Authors: Johannes Hubmayr, Hsiao-Mei Cho, Gene C Hilton, Kent D Irwin, Duncan Hanson
Abstract: Gravitational lensing of the cosmic microwave background generates a curl pattern in the observed polarization. This "{Beta}-mode" signal provides a measure of the projected mass distribution over the entire observable Universe and also acts as a ...

44. Enhanced WWVB Broadcast Format
Topic: Physics
Published: 9/30/2013
Author: John P Lowe
Abstract: Enhanced WWVB Broadcast for web site

45. Automated Control of National Time Standards via the SIM Time Scale
Topic: Physics
Published: 9/27/2013
Authors: Michael A Lombardi, J. Mauricio Lopez-Romero, Nelida Diaz-Munoz
Abstract: This paper describes a frequency and time control system developed by the Sistema Interamericano de Metrologia (SIM). Due to limited resources, some SIM national metrology institutes maintain a low-cost rubidium clock as their national time standard, ...

46. Development of in-situ calibration method for current-to-voltage converters for high-accuracy SI-traceable low-DC-current measurements
Topic: Physics
Published: 9/20/2013
Authors: George P Eppeldauer, Howard W Yoon, Dean G Jarrett, Thomas C Larason
Abstract: For photocurrent measurements with low uncertainties, wide-dynamic range reference current-to-voltage converters and a new converter calibration method have been developed at the National Institute of Standards and Technology (NIST). The high feedba ...

47. The Case for Cross Disciplinary Research on Time Aware Applications, Computers and Communication Systems (TAACCS)
Topic: Physics
Published: 9/18/2013
Authors: Marc A Weiss, J C Eidson, Charles Barry, L Goldin, Bob Iannucci, Edward Lee, Kevin Stanton
Abstract: A new economy built on the massive growth of endpoints on the internet will require precise and verifiable timing in ways that current systems do not support. Applications, computers and communications systems have been developed with modules and lay ...

48. Spiral Resonators for On-Chip Laser Frequency Stabilization
Topic: Physics
Published: 9/17/2013
Authors: Scott A Diddams, Hansuek Lee, Myoung=Gyun Suh, Tong Chen, Jiang Li, Kerry J. Vahala
Abstract: Frequency references are indispensable to radio, microwave, and time keeping systems, with far reaching applications in navigation, communi- cation, remote sensing, and basic science. Over the past decade there has been an optical revo- lution in tim ...

49. Quantum simulation and many-body physics with hundreds of trapped ions
Topic: Physics
Published: 9/14/2013
Authors: John J Bollinger, Joseph Wright Britton, Brian C Sawyer
Abstract: By employing forces that depend on the internal electronic state (or spin) of an atomic ion, the Coulomb potential energy of a trapped ion crystal can be modified in a spin-dependent way to mimic effective quantum spin Hamiltonians. We use simple mod ...

50. An atomic clock with 10^u-18^ instability
Topic: Physics
Published: 9/13/2013
Authors: Andrew D Ludlow, Nathan Morris Bjork Hinkley, Jeffrey Aaron Sherman, Nathaniel Blair Phillips, Marco Schioppo, Nathan D. Lemke, Kyle P Beloy, M Pizzocaro, Christopher W Oates
Abstract: Atomic clocks have been transformational in science and technology, leading to innovations such as global positioning, advanced communications, and tests of fundamental constant variation. Next-generation optical atomic clocks can extend the capabili ...

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