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Displaying records 91 to 100 of 211 records.
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91. Decoherence due to elastic Rayleigh scattering
Topic: Physics
Published: 11/12/2010
Authors: Hermann Uys, Michael J. Biercuk, Aaron Vandevender, Christian Ospelkaus, Dominic Meiser, R. Ozeri, John J Bollinger
Abstract: We present theoretical and experimental studies of the decoherence of hyperfine ground-state superpositions due to elastic Rayleigh scattering of off-resonant light. We demonstrate that under appropriate conditions, elastic Rayleigh scattering can b ...

92. A Microwave Study of Hydrogen-Transfer-Triggered Methyl-Group Rotation in 5-Methyltropolone
Topic: Physics
Published: 11/10/2010
Authors: Vadim V. Ilyushin, Emily A. Cloessner, Yung-Ching Chou, Laura B. Picraux, Jon Torger Hougen, Richard Lavrich
Abstract: We present here the first experimental and theoretical study of the microwave spectrum of 5-methyltropolone, which can be visualized as a 7-membered aromatic carbon ring with a five-membered hydrogen-bonded cyclic structure at the top and a methyl ...

93. Effect of metal/substrate interfaces on radio-frequency loss in superconducting coplanar waveguides
Topic: Physics
Published: 11/8/2010
Authors: David S. Wisbey, Jiansong Gao, Fabio Cesar Da Silva, Jeffrey S. Kline, Michael Robert Vissers, David P Pappas, Leila R Vale
Abstract: Microscopic two-level systems (TLSs) are known to contribute to loss in resonant superconducting microwave circuits. This loss increases at low power and temperatures as the TLSs become unsaturated. We find that the loss is dependent on both the subs ...

94. Nuclear Magnetic Resonance Gyroscopes
Topic: Physics
Published: 11/2/2010
Author: Elizabeth A Donley
Abstract: Nuclear magnetic resonance gyroscopes(NMRGs)detect rotation as shift in the Larmor precession frequency of nuclear spins. A review of the open literature on NMRGs is presented, which includes an introduction to the spectroscopic techniques that enabl ...

95. SIM time scales
Topic: Physics
Published: 10/27/2010
Authors: Michael A Lombardi, J. Mauricio Lopez-Romero, Nelida Diaz-Munoz
Abstract: This paper presents an analysis of the performance of some of the time scales generated in the Sistema Interamericano de Metrologia (SIM) region. We emphasize the generation of the first international time scale in near real time, the SIM Time scale ...

96. The evolving optical frequency comb
Topic: Physics
Published: 10/22/2010
Author: Scott A Diddams
Abstract: Much as natural historians search for the first roots of our human race, curiosity drives the laser scientist to pursue the roots of his or her own field. This is especially the case in this year where our community celebrates the 50th anniversary o ...

97. Characterization of a Soluble Anthradithiophene Derivative
Topic: Physics
Published: 10/1/2010
Authors: Brad Conrad, Calvin Chan, Marsha A. Loth, Sean R Parkin, Xinran Zhang, John E Anthony, David J Gundlach
Abstract: The structural and electrical properties of a new solution processable material, 2,8-diflouro-5,11-tert-butyldimethylsilylethynl anthradithiophene (TBDMS), were measured for single crystal and spun cast thin-film transistors. TBDMS is observed to rea ...

98. Cross-validation of microfabricated atomic magnetometers with SQUIDs for biomagnetic applications
Topic: Physics
Published: 9/28/2010
Authors: Svenja A Knappe, Tillman H. Sander, Olaf Kosch, Frank Wiekhorst, John E Kitching, Lutz Trahms
Abstract: A chip-scale atomic magnetometer (CSAM) is compared with a superconducting quantum interference devices (SQUID) sensor in two biomedical applications. CSAMs are magnetic field sensors that operate at room temperature and are based on spectroscopy of ...

99. Relativity and Optical Clocks
Topic: Physics
Published: 9/24/2010
Authors: Chin W. Chou, David Hume, Till P Rosenband, David J Wineland
Abstract: Albert Einstein's theory of relativity forced us to alter our concepts of reality. One of the more startling outcomes of the theory is that we have to give up our notions of simultaneity. This is manifest in the so-called twin paradox in which a twin ...

100. On-Board Signal Integrity for GPS
Topic: Physics
Published: 9/21/2010
Authors: Marc Abbott Weiss, Pradipta Shome, Ron Beard
Abstract: The elements of a space-based integrity approach are to monitor the signals on-board the satellite, such that signal performance can be maintained well within desired integrity limits. These elements include 1) a system for monitoring multiple atomi ...

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