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Topic Area: Physics
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Displaying records 31 to 40 of 705 records.
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31. State-of-the-Art RF Signal Generation From Optical Frequency Division
Topic: Physics
Published: 9/2/2013
Authors: Archita Hati, Craig W Nelson, Corey Andrew Barnes, Danielle Grace Lirette, Tara Michele Fortier, Franklyn J Quinlan, Jason A. (Jason) DeSalvo, Andrew D Ludlow, Till P Rosenband, Scott A Diddams, David Allan Howe
Abstract: We present the design of a novel, ultra-low phase-noise frequency synthesizer implemented with extremely low noise regenerative frequency dividers. This synthesizer generates eight outputs viz. 1.6 GHz, 320 MHz, 160 MHz, 80 MHz, 40 MHz, 20 MHz, 10 MH ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911991

32. Detection of l-C3H+ in Sgr B2(N) and Sgr B2(OH) and Refinement of its Spectroscopic Constants via the Publicly Available PRIMOS Survey and the Barry E. Turner Legacy Survey
Topic: Physics
Published: 9/1/2013
Authors: Francis John Lovas, Brett A. McGuire, P. Brandon Carroll, Ryan A. Loomis, Geoffery A. Blake, Jan M. Hollis, Phillip R. Jewell, Anthony J. Remijan
Abstract: Pety et al. (2012) recently reported the detection and assignment of l-C3H+ in the Horsehead nebula. Here, we expand that analysis to include the J = 1 - 0 and J = 2 - 1 transitions of l-C3H+ observed in absorption towards Sgr B2(N) in data from the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913359

33. Report of Special Nuclear Material Validation Measurements for Backpack Type Radiation Detectors
Series: Technical Note (NIST TN)
Report Number: 1808
Topic: Physics
Published: 8/19/2013
Authors: Leticia S Pibida, Christina Ward
Abstract: This report provides results and recommendations from the validation testing for the different source configurations and radiation fields produced by special nuclear materials (SNMs) and depleted uranium (DU) listed within the Technical Capabilit ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914345

34. Relaxation timescales and decay of correlations in a long-range interacting quantum simulator
Topic: Physics
Published: 8/2/2013
Authors: John J Bollinger, Mauritz van den Worm, Rytis Paskauskas, Brian C Sawyer, Michael Kastner
Abstract: When a physical system is coupled to a heat bath, one expects to observe thermalization to an equilibrium state whose temperature is determined by the bath properties. For an isolated many-body system, i.e. in the absence of a heat bath, the situatio ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912412

35. Cancellation of Doppler Shifts in a Cold-Atom CPT Clock
Topic: Physics
Published: 7/25/2013
Authors: Elizabeth A Donley, Francois-Xavier R. Esnault, Eric Michael Blanshan, John E Kitching
Abstract: A compact cold-atom clock based on coherent population trapping (CPT) is being developed. Long-term goals for the clock include achieving a fractional frequency accuracy of 1x10^u-13^ in a package of less than 10 cm^u3^ in volume. Here we present an ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914284

36. Parametric seeding of a microresonator optical frequency comb
Topic: Physics
Published: 7/16/2013
Authors: Scott B Papp, Pascal Patrice Del'Haye, Scott A Diddams
Abstract: We have investigated parametric seeding of a microresonator frequency comb (microcomb) by way of a pump laser with two intensity modulation sidebands. We show that the pump-sideband spacing is precisely replicated throughout the microcomb's optical s ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913921

37. Determining the Uncertainty of Frequency Measurements Referenced to GPS Disciplined Oscillators
Topic: Physics
Published: 7/15/2013
Author: Michael A Lombardi
Abstract: GPS disciplined oscillators (GPSDOs) are commonly used as references for frequency calibrations. Over long intervals, a GPSDO is an inherently accurate source of frequency because it is continuously adjusted to agree with the Coordinated Universal T ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913897

38. Superposition, Entanglement, and Raising Schroedinger's Cat
Topic: Physics
Published: 7/12/2013
Author: David J Wineland
Abstract: This is a written version of the lecture I presented in connection with the Nobel Prize ceremonies in December 2012. The paper briefly summarizes experiments on quantum state manipulaiton and measurement in the context of trapped atomic ions. The f ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913387

39. Mechanical Control of a Microrod-Resonator Optical Frequency Comb
Topic: Physics
Published: 7/8/2013
Authors: Scott B Papp, Pascal Patrice Del'Haye, Scott A Diddams
Abstract: Robust control and stabilization of optical frequency combs enables an extraordinary range of scientific and technological applications, including frequency metrology at extreme levels of precision, novel spectroscopy of quantum gases and of molecule ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911366

40. Demonstration of a dressed-state phase gate for trapped ions
Topic: Physics
Published: 6/28/2013
Authors: Ting Rei Tan, John P Gaebler, Ryan Steven Bowler, Yiheng Lin, John D. Jost, Dietrich G Leibfried, David J Wineland
Abstract: We demonstrate a trapped ion entangling gate scheme proposed by Bermudez et~al [Phys. Rev. A 85, 040302 (2012)]. Simultaneous excitation of a strong carrier and a single sideband transition enables deterministic creation of entangled states. The meth ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913171



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