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You searched on: Topic Area: Physics Sorted by: title

Displaying records 1 to 10 of 319 records.
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1. Measuring the Neutron Lifetime with Magnetically Trapped Ultracold Neutrons
Topic: Physics
Published: 12/16/2013
Author: Hans P Mumm
Abstract: We describe an experiment to measure the neutron lifetime using a technique with a set of systematic uncertainties largely different than those of previous measurements. In this approach, UCN are produced by inelastic scattering of cold (0.89 nm) ne ...

2. A 12.5 GHz-Spaced Optical Frequency Comb Spanning >400 nm for Infrared Astronomical Spectrograph Calibration
Topic: Physics
Published: 6/10/2010
Authors: Franklyn J Quinlan, Gabriel George Ycas, Steve Osterman, Scott A Diddams
Abstract: A 12.5 GHz-spaced optical frequency comb locked to a Global Positioning System disciplined oscillator for near IR spectrograph calibration is presented. The comb is generated via filtering a 250 MHz-spaced comb. Subsequent nonlinear broadening of the ...

3. A 420 MHz Cr:forsterite Femtosecond Ring Laser and Its Use for Continuum Generation in the 1-2 Micron Range
Topic: Physics
Published: 8/1/2003
Authors: I Thomann, A Bartels, Kristan L. Corwin, Nathan Reynolds Newbury, Leo W. Hollberg, Scott A Diddams, Jeffrey W. Nicholson, M. F. Yan
Abstract: We demonstrate a chromium-doped forsterite femtosecond ring laser that generates 30-fs pulses at a 420-MHz repetition rate with nearly 500 mW of average power. The compact solid-state design and broad spectral output make this laser attractive for te ...

4. A Bose-Einstein Condensate in a Uniform Light-Induced Vector Potential
Topic: Physics
Published: 3/30/2009
Authors: Yu-Ju Lin, Robert L. Compton, Abigail Reiko Perry, William D Phillips, James V Porto, Ian B Spielman
Abstract: We use a two-photon dressing field to create an effective vector gauge potential for Bose-condensed ^87Rb atoms in the F=1 hyperfine ground state. The dressed states in this Raman field are spin and momentum superpositions, and we adiabatically load ...

5. A Microwave Study of Hydrogen-Transfer-Triggered Methyl-Group Rotation in 5-Methyltropolone
Topic: Physics
Published: 11/10/2010
Authors: Vadim V. Ilyushin, Emily A. Cloessner, Yung-Ching Chou, Laura B. Picraux, Jon Torger Hougen, Richard Lavrich
Abstract: We present here the first experimental and theoretical study of the microwave spectrum of 5-methyltropolone, which can be visualized as a 7-membered aromatic carbon ring with a five-membered hydrogen-bonded cyclic structure at the top and a methyl ...

6. A NIST Disciplined Oscillator
Topic: Physics
Published: 7/26/2010
Author: Michael A Lombardi
Abstract: The National Institute of Standards and Technology (NIST) now offers a service that provides customers with an oscillator locked to UTC(NIST), the United States national standard for frequency and time. A NIST disciplined oscillator (NISTDO) works by ...

7. A NIST Disciplined Oscillator: Delivering UTC(NIST) to the Calibration Laboratory
Topic: Physics
Published: 12/1/2010
Author: Michael A Lombardi
Abstract: The National Institute of Standards and Technology (NIST) now offers a service that provides customers with an oscillator locked to UTC(NIST), the United States national standard for frequency and time. A NIST disciplined oscillator (NISTDO) works b ...

8. 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 ...

9. 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 ...

10. 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 ...

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