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Topic Area: Physics
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Displaying records 551 to 560 of 762 records.
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551. Ratio of the Al^u+^ and Hg^u+^ Optical Clock Frequencies to 17 Decimal Places
Topic: Physics
Published: 8/25/2008
Authors: Wayne M Itano, Till P Rosenband, David Hume, P.O. Schmidt, Chin W. Chou, A. Brusch, Luca Lorini, Windell Oskay, Robert E. Drullinger, Sarah Bickman, Tara Michele Fortier, Jason Stalnaker, Scott A Diddams, William C Swann, Nathan Reynolds Newbury, David J Wineland, James C Bergquist
Abstract: Frequency standards (atomic clocks) based on narrow optical transitions in ^u27^Al^u+^ and ^u199^Hg^u+^ have been developed over the past several years at NIST. These two types of standards are both based on single ions confined in Paul traps, but di ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842568

552. Real-Time Generation of the SIM Time Scale (SIMT) from International Clock Comparisons
Topic: Physics
Published: 8/13/2011
Authors: Michael A Lombardi, Jose M. Lopez, Andrew N Novick, Francisco Jimenez, Nelida Diaz-Munoz, Eduardo de Carlos Lopez, Jean-Simon Boulanger, Raymond Pelletier, Ricardo de Carvalho, Raul Solis, Harold Sanchez, Liz Catherine Hernandez Forero, Junior Gordon, Daniel Perez, Eduardo Bances, Leonardo Trigo, Victor Masi, Henry Postigo, Anthony Questelles, Anselm Gittens, Rodrigo Ramos P.
Abstract: The Sistema Interamericano de Metrologia (SIM) is one of the world‰s five major regional metrology organizations (RMOs). The SIM members are the national metrology institutes (NMIs) located in the 34 nations of the Organization of American States (OA ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907963

553. Realization of a programmable two-qubit quantum processor
Topic: Physics
Published: 11/15/2009
Authors: David Hanneke, Jonathan Home, John D. Jost, Jason Amini, Dietrich G Leibfried, David J Wineland
Abstract: The universal quantum computer is a device that could simulate any physical system and represents a major goal for the field of quantum information science. Algorithms performed on such a device are predicted to offer significant gains for some impor ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903420

554. Realization of quantum error correction
Topic: Physics
Published: 12/2/2004
Authors: J Chiaverini, Dietrich G Leibfried, Tobias Schaetz, Murray D Barrett, Brad Rodney Blakestad, Joseph Wright Britton, Wayne M Itano, John D. Jost, Emanuel H Knill, C. Langer, R Ozeri, David J Wineland
Abstract: Scalable quantum computation and communication require error control to protect quantum information against unavoidable noise. Quantum error correction protects quantum information stored in two-level quantum systems (qubits) by rectifying errors wit ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50068

555. Recent Calibrations of UTC(NIST) and UTC(USNO)
Topic: Physics
Published: 11/26/2012
Authors: Victor Shufang Zhang, Thomas Edward Parker, Russell Bumgarner, Jonathan Hirschauer, Angela Mckinley, Stephen Mitchell, Ed Powers, Jim Skinner, Demetrios Matsakis
Abstract: The National Institute of Standards and Technology (NIST) and the United States Naval Observatory (USNO) use GPS common-view, carrier-phase time transfer and Two Way Satellite Time and Frequency Transfer (TWSTFT, also known as TWSTT) techniques in ou ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912837

556. Recent atomic clock comparisions at NIST
Topic: Physics
Published: 10/1/2008
Authors: Luca Lorini, Neil Ashby, Anders Brusch, Scott A Diddams, Robert E. Drullinger, Eric Eason, Tara Michele Fortier, Pat Hastings, Thomas Patrick Heavner, David Hume, Wayne M Itano, Steven R Jefferts, Nathan Reynolds Newbury, Thomas Edward Parker, Till P Rosenband, Jason Stalnaker, William C Swann, David J Wineland, James C Bergquist
Abstract: The record of atomic clock frequency comparisons at NIST over the past half-decade provides one of the tightest constraints of any present-day, temporal variations of the fundamental constants. Notably, the 6-year record of increasingly precise measu ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842476

557. Recent experiments in trapped-ion quantum information processing at NIST
Topic: Physics
Published: 5/1/2006
Authors: J Chiaverini, Murray D Barrett, Brad Rodney Blakestad, Joseph Wright Britton, Wayne M Itano, John D. Jost, Emanuel H Knill, C. Langer, Dietrich G Leibfried, R Ozeri, Tobias Schaetz, David J Wineland
Abstract: Atomic ions confined in segmented trap arrays provide a system for quantum information processing. We report on the execution of two simple quantum algorithms, quantum error correction and the quantum Fourier transform, using this implementation. The ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50146

558. Recent experiments in trapped-ion quantum information processing at NIST
Topic: Physics
Published: 5/1/2006
Authors: J Chiaverini, Matthew P. Barrett, Brad Rodney Blakestad, Joseph Wright Britton, Wayne M Itano, John D. Jost, Emanuel H Knill, C. Langer, Dietrich G Leibfried, R Ozeri, T Schaetz, David J Wineland
Abstract: Atomic ions confined in segmented trap arrays provide a system for quantum information processing. We report on the execution of two simple quantum algorithms, quantum error correction and the quantum Fourier transform, using this implementation. The ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841893

559. Reducing oscillator PM noise from AM-PM noise correlaiton
Topic: Physics
Published: 8/14/2014
Authors: Archita Hati, Craig W Nelson, David Allan Howe
Abstract: We present a new scheme for improving the phase modulated (PM) noise of an oscillator from correlation between amplitude modulated (AM) and PM noise. Experimental results of this correlation effect are presented. An improvement of almost 10 dB in th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916261

560. Reflectance Factor Measurement Complications Due to Near Infrared Fluorescence
Topic: Physics
Published: 9/1/2010
Authors: Maria E Nadal, Carl C Miller, Clarence Joseph Zarobila
Abstract: The researchers at the National Institute of Standards and Technology (NIST) have found that the widely used orange and red color tiles unexpectedly exhibit near infrared fluorescence. An analysis of the effect this fluorescence component has on the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903843



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