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Topic Area: Physics
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Displaying records 31 to 40 of 761 records.
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31. A Spin-1/2 Optical Lattice Clock
Topic: Physics
Published: 8/7/2009
Authors: Nathan D. Lemke, Andrew D Ludlow, Zeb Barber, Tara Michele Fortier, Scott A Diddams, Yanyi Jiang, Steven R Jefferts, Thomas Patrick Heavner, Thomas Edward Parker, Christopher W Oates
Abstract: We experimentally investigate an optical clock based on ^u171^Yb (I = 1/2) atoms confined in an optical lattice. We have evaluated all known frequency shifts to the clock transition, including the density-dependent collision shift, with an uncertaint ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901526

32. A Study of the Diurnal in the Transatlantic TWSTFT Difference
Topic: Physics
Published: 9/7/2013
Authors: Victor Shufang Zhang, Thomas Edward Parker
Abstract: The daily variation (diurnal) in the two-way satellite time and frequency transfer (TWSTFT) difference is one of the most significant instabilities of the TWSTFT technique. The diurnal comes from the daily delay change of the TWSTFT signal paths. In ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914577

33. A Sub-Sampling Digital PM/AM Noise Measurement System
Topic: Physics
Published: 5/24/2012
Authors: Craig W Nelson, David Allan Howe
Abstract: A digital phase/amplitude modulation (PM/AM) noise measurement system (DNMS) implementing field programmable gate array (FPGA) based digital down converters (DDCs), and 250 MHz analog to digital converters (ADCs) is reported. Performance in the firs ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911539

34. A Sub-Sampling Digital PM/AM Noise Measurement System
Topic: Physics
Published: 9/1/2012
Authors: Craig W Nelson, David Allan Howe
Abstract: A digital phase/amplitude modulation (PM/AM) noise measurement systems (DNMS) implementing field progammable gate array (FPGA) based digital down converters (DDCs), and 250 MHz analog to digital converters (ADCs) is reported. Measurements in the firs ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912155

35. A Summary of Lightpipe Radiation Thermometry Research at NIST
Series: Journal of Research (NIST JRES)
Report Number: 111
Topic: Physics
Published: 1/1/2006
Author: Benjamin K Tsai
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104784

36. A Theoretical and Experimental Analysis of Frequency Transfer Uncertainty, Including Frequency Transfer into TAI
Topic: Physics
Published: 7/21/2010
Authors: Thomas Edward Parker, Gianna Panfilo
Abstract: In this work we present a study of the determination of frequency transfer uncertainty in time series measurements. The first part of this paper is dedicated to the theoretical study of the frequency uncertainty in relation to the Allan deviation ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902318

37. A UHV-Compatible Two-Crystal Monochromator for Synchrotron Radiation
Topic: Physics
Published: 12/1/1998
Authors: P L Cowan, J B Hastings, Terrence J Jach, J P Kirkland
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100640

38. A View on Energy Transfer Between Cold Atoms
Topic: Physics
Published: 11/22/2013
Author: Elizabeth A Donley
Abstract: This is an invited perspective article on a paper that will appear in the same issue. The perspective describes imaging energy transfer between cold Rydberg atoms.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914960

39. A balanced homodyne detector and local oscillator shaping for measuring optical Schr{omlat}dinger cat states
Topic: Physics
Published: 5/12/2011
Authors: Thomas Gerrits, Scott C Glancy, Sae Woo Nam
Abstract: We present our implementation of an optical homodyne detector used to measure optical Schr{omlat}dinger cat states. We show how we minimized the losses and mode-mismatches associated with homodyne detection, which become important when measuring ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908299

40. A circular dielectric grating for vertical extraction of single quantum dot emission
Topic: Physics
Published: 7/25/2011
Authors: Marcelo Ishihara Davanco, Matthew T. Rakher, Dieter Schuh, Antonio Badolato, Kartik A Srinivasan
Abstract: We demonstrate a suspended circular grating composed of partially etched annular trenches in a thin GaAs membrane, designed for e±cient and moderately broadband ( approx. 5 nm) extraction of emission from single InAs quantum dots. Simulations indic ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908236



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