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Topic Area: Physics

Displaying records 81 to 90 of 631 records.
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81. Trapped-Ion State Detection through Coherent Motion
Topic: Physics
Published: 12/9/2011
Authors: Till P Rosenband, David Hume, Chin W. Chou, David R Leibrandt, Michael J. (Michael) Thorpe, David J Wineland
Abstract: Coherent control of trapped atomic ions has led to several recent advances in quantum information processing^u1^ and precision spectroscopy^u2^. A basic requirement for these and other quantum-metrology experiments is the ability to detect the state ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908888

82. Noise floor reduction of an Er:fiber laser-based photonic microwave generator
Topic: Physics
Published: 12/1/2011
Authors: Haifeng (Haifeng) Jiang, Jennifer A. Taylor, Franklyn J Quinlan, Tara Michele Fortier, Scott A Diddams
Abstract: Commercially available erbium-doped mode-locked fiber lasers are compact, robust, and suitable to be the frequency divider of an ultra-low phase noise photonic microwave generator. However, for a mode-locked fiber laser with repetition rate of a few ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909433

83. The New SI: The Role of CODATA
Topic: Physics
Published: 12/1/2011
Authors: David B Newell, Peter J Mohr, Barry Norman Taylor
Abstract: The mission of the International Council for Science : Committee on Data for Science and Technology (CODATA ) is to strengthen international science for the benefit of society by promoting improved scientific and technical data management and use. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908747

84. Cold-collision-shift cancelation and inelastic scattering in a Yb optical lattice clock
Topic: Physics
Published: 11/28/2011
Authors: Andrew D Ludlow, Nathan D. Lemke, Jeffrey Aaron Sherman, Christopher W Oates, G. Quemener, J. von Stecher, A.M. Rey
Abstract: Recently, {rho}-wave cold collisions were shown to dominate the density-dependent shift of the clock transition frequency in a ^u171^Yb optical lattice clock. Here we demonstrate that by operating such a system at the proper excitation fraction, the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910172

85. Quantum simulation of the hexagonal Kitaev model with trapped ions
Topic: Physics
Published: 11/25/2011
Authors: Dietrich G Leibfried, Roman Schmied , Janus H. Wesenberg
Abstract: We present a detailed study of quantum simulations of coupled spin systems in surface-electrode ion-trap arrays, and illustrate our findings with a proposed implementation of the hexagonal Kitaev model [A. Kitaev, Annals of Physics 321,2 (2006)]. The ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909138

86. High-resolution single-mode fiber-optic distributed Raman sensor for absolute temperature measurement using superconducting nanowire single-photon detectors
Topic: Physics
Published: 11/17/2011
Authors: Michael G. Tanner, Shellee Dawn Dyer, Burm Baek, Robert Hadfield, Sae Woo Nam
Abstract: We demonstrate a distributed fiber Raman sensor for absolute temperature measurement with spatial resolution on the order of 1 cm at 1550 nm wavelength in single mode fiber using superconducting nanowire single photon detectors. Rapid measurements ar ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908723

87. Spectral and temporal characterization of a fused-quartz-microresonator optical frequency comb
Topic: Physics
Published: 11/17/2011
Authors: Scott A Diddams, Scott Brian Papp
Abstract: We report on the fabrication of high Q fused quartz microresonators and the generation of a frequency comb with 36 GHz mode spacing using them. We have characterized the intrinsic stability of the comb in both the time and frequency domains. Intensit ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908771

88. Uncertainty analysis for a high-spatial resolution single-mode fiber-optic distributed temperature sensor
Topic: Physics
Published: 11/17/2011
Authors: Shellee Dawn Dyer, Michael Tanner, Burm Baek, Robert Hadfield, Sae Woo Nam
Abstract: We demonstrate a high-accuracy distributed fiber optic temperature sensor using superconducting nanowire single-photon detectors and single photon counting techniques. Our demonstration uses inexpensive single-mode fiber at standard telecommunication ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910008

89. Generation and characterization of high-purity, pulsed squeezed light at telecom wavelengths from pp-KTP
Topic: Physics
Published: 11/15/2011
Authors: Thomas Gerrits, Martin J Stevens, Burm Baek, Brice Robert Calkins, Adriana Eleni Lita, Scott C Glancy, Emanuel H Knill, Sae Woo Nam, Richard P Mirin, Robert Hadfield, Ryan Bennink, Warren Grice, Sander N. Dorenbos, Tony Zijlstra, Teun Klapwijk, Val Zwiller
Abstract: We characterize a pp-KTP crystal designed to produce pure single mode squeezed vacuum at 1570 nm. Measurements show a raw (corrected) Hong-Ou-Mandel interference with 86 % (90 %) visibility and a circular joint spectral probability distribution with ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908774

90. Characterizing Dynamic Effects of Oscillator Power Cycling
Topic: Physics
Published: 11/14/2011
Authors: David Allan Howe, Danielle Grace Lirette, Neil Ashby, Archita Hati, Craig W Nelson
Abstract: We create a measurement technique and metrics consistent with easy interpretation to be used in development of new oscillators specifically for applications in which the oscillator’s power is turned on and off. This is useful in predicting the perfo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910242