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Topic Area: Physics

Displaying records 531 to 540 of 777 records.
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531. Elimination of two level fluctuators in superconducting quantum bits by an epitaxial tunnel barrier
Topic: Physics
Published: 9/7/2006
Authors: Seongshik Oh, Katarina Cicak, Jeffrey S. Kline, Mika Sillanpaa, Jed Douglas Whittaker, Raymond Wiley Simmonds, David P Pappas, Kevin Osborn
Abstract: Quantum computing based on Josephson junction technology is considered promising due to its scalable architecture. However, decoherence is a major obstacle. Here, we report evidence for improved Josephson quantum bits qubits using a single-crystal ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32352

532. Characterization and Calibration of an Optical Time Domain Reflectometer Calibrator
Topic: Physics
Published: 8/23/2006
Authors: Donald R Larson, Nicholas G Paulter Jr, Kenneth C Blaney
Abstract: We report the results of an investigation into the signal characteristics and behavior of an instrument used to calibrate Optical Time Domain Reflectometers. This instrument implements the Telecommunications Industry Association standard TIA/EIA-455- ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32309

533. A compact phase delay technique for increasing the amplitude of coherent population trapping resonances in open Lambda systems
Topic: Physics
Published: 8/1/2006
Authors: V Shah, Svenja A Knappe, P Schwindt, Vladislav Gerginov, John E Kitching, Leo W. Hollberg
Abstract: We propose and demonstrate a novel technique for increasing the amplitude of coherent population trapping (CPT) resonance in open Lambda systems. The technique requires no complex modifications to the conventional CPT setup and is compatible with sta ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841929

534. A single-ion optical clock with high accuracy
Topic: Physics
Published: 7/14/2006
Authors: W Oskay, Scott A Diddams, Elizabeth A Donley, Tara Michele Fortier, Thomas Patrick Heavner, Leo W. Hollberg, Wayne M Itano, Steven R Jefferts, M J. Jensen, Kyoungsik Kim, F Levi, Thomas Edward Parker, James C Bergquist
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841942

535. Heating Rates and Enhanced Equilibration Rates with Strongly Correlated Ions in a Penning-Malmberg Trap
Topic: Physics
Published: 6/25/2006
Authors: John J Bollinger, Marie J Jensen, T Hasegawa, D HE Dubin
Abstract: We laser cool up to 10^u6^ ^u9^Be^u+^ ions to ~ 1 mK in a Penning-Malmberg trap and measure the ion temperature as a function of time after turning off the cooling laser. We observe a rapid heating of the ions when the their temperature in a directio ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50410

536. A Local Oscillator for Chip-Scale Atomic Clocks at NIST
Topic: Physics
Published: 6/5/2006
Authors: Alan Brannon, J Breitbarth, Z Popovic, Vladislav Gerginov, V Shah, Svenja A Knappe, Leo W. Hollberg, John E Kitching
Abstract: We report the first local oscillator (LO) demonstrating viability in terms of performance, size, and power, for chip-scale atomic clocks (CSAC) at the National Institute of Standards and Technology in Boulder, CO. This volgate-controlled oscillator ( ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50388

537. Relativity and Timing in X-ray Pulsar Navigation
Topic: Physics
Published: 6/5/2006
Authors: Neil Ashby, David Allan Howe
Abstract: XNAV is a technology demonstration that will use photons from X-ray pulsars for navigation and spacecraft attitude determination. This paper summarizes relativistic effects in the context of XNAV. It also characterizes the primary task in the time do ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50396

538. Government Jobs for Physicists: Believe It or Not Challenging and Satisfying!
Topic: Physics
Published: 5/30/2006
Author: David G Seiler
Abstract: This presentation details the benefits of government positions for physicists based on the experiences of a NIST Division Chief.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32273

539. 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

540. 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



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