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Displaying records 11 to 20 of 291 records.
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11. A deep-UV optical frequency comb at 205 nm
Topic: Physics
Published: 5/25/2009
Authors: Scott A Diddams, E Peters, P Fendel, S Reinhardt, T W Hansch, T Udem
Abstract: By frequency quadrupling a picosecond pulse train from a Ti:sapphire laser at 820 nm we generate a frequency comb at 205 nm with nearly bandwidth-limited pulses. The nonlinear frequency conversion is accomplished by two successive frequency doubling ...

12. A microscene approach to the evaluation of hyperspectral system level performance
Topic: Physics
Published: 5/18/2013
Authors: David W Allen, Ronald Resmini, Christopher Deloye
Abstract: Assessing the ability of a hyperspectral imaging (HSI) system to detect the presence of a substance or to quantify abundance requires an understanding of the many factors in the end-to-end remote sensing scenario from scene to sensor to data expl ...

13. A strong loophole-free test of local realism
Topic: Physics
Published: 12/16/2015
Authors: Lynden Krister Shalm, Evan Meyer-Scott, B. G. Christensen, Peter LaBonne Bierhorst, Michael Alan Wayne, Deny Hamel, Martin J Stevens, Thomas Gerrits, Scott C Glancy, Michael Shane Allman, Kevin J Coakley, Shellee Dawn Dyer, Adriana E Lita, Varun Boehm Verma, Joshua C Bienfang, Alan L Migdall, Yanbao Zhang, William Farr, Francesco Marsili, Matthew D. Shaw, Jeffrey Stern, Carlos Abellan, Waldimar Amaya, Valerio Pruneri, Thomas Jennewein, Morgan Mitchell, P. G. Kwiat, Richard P Mirin, Emanuel H Knill
Abstract: We present a loophole-free violation of local realism using entangled photon pairs. We ensure that all relevant events in our Bell test are spacelike separated by placing the parties far enough apart and by using fast random number generators and hig ...

14. Absolute line intensities for oxirane from 1420 to 1560 cm-1
Topic: Physics
Published: 11/15/2013
Authors: F Kwabia Tchana, M. Ngom, Agnes Perrin, Jean-Marie Flaud, Walter Joseph Lafferty, S. A. Ndiaye, El. A. Ngum
Abstract: Absolute individual line intensities of numerous transitions of the fundamental ν2 and ν10 bands of oxirane (ethylene oxide, c-C2H4O) have been measured in the 1420-1560 cm-1 region using seven high- resolution Fourier transform spectra ...

15. Absolute line intensities for the nu3 band of oxirane (C2H4O)
Topic: Physics
Published: 11/15/2013
Authors: Walter Joseph Lafferty, Jean-Marie Flaud, Fridolin Kwabia, A. Perrin, M. Ngom
Abstract: Seven Fourier transform spectra of the ν3 band of oxirane (ethylene oxide) have been recorded with different pressures and used to derive individual line intensities. These line intensities were satisfactorily fit leading to accurate transition ...

16. Absorptions Between 3000 and 5500 cm-1 of cyclic O4+ and O4- Trapped in Solid Neon
Topic: Physics
Published: 12/19/2013
Authors: Marilyn E Jacox, Warren Elwin Thompson
Abstract: Recently, gas-phase absorptions in the 3000 to 4300 cm-1 spectral region have been assigned to combination bands built on (v1 + v5) of ground-state cyc-O4+. Other gas-phase experiments identified an electronic transition of cyc-O4- complexed with an ...

17. Accurate multiconfiguration calculations of energy levels, lifetimes and transition rates for the silicon isoelectronic sequence: Ti IX - Ge XIX, Sr XXV, Zr XXVII, Mo XXIX
Topic: Physics
Published: 12/6/2015
Authors: P. Jonsson, L Radziute, G. Gaigalas, M. Godefroid, J P Marques, T Brage, Charlotte Fischer, I. P. Grant
Abstract: Multiconfiguration Dirac-Hartree-Fock (MCDHF) calculations and relativistic configuration interaction (RCI) calculations are performed for states of the 3s23p2, 3s3p3 and 3s23p3d configurations in the Si-like ions Ti IX - Ge XIX, Sr XXV, Zr XXVII, M ...

18. Adapting the Poisson-Influenced K-Means Algorithm for a Larger User Base
Topic: Physics
Published: 11/19/2015
Authors: Brian P. Morris, Zachary H Levine
Abstract: A superconducting transition edge sensor (TES) can be a useful tool for counting the number of photons in a highly attenuated pulse of light, but it requires calibration for its outputs to be interpretable as photon numbers. The Poisson-Influenced K- ...

19. Advances in Coherent Population Trapping for Atomic Clocks
Topic: Physics
Published: 8/10/2010
Authors: John E Kitching, Vishal Shah
Abstract: We review advances in the field of coherent population trapping (CPT) over the last decade with respect to the application of this physical phenomenon to atomic frequency references. We provide an overview of both the basic phenomenon of coherent pop ...

20. Alpha-Dot or Not: Comparison of Two Single Atom Optical Clocks
Topic: Physics
Published: 10/5/2008
Authors: Till P Rosenband, David Hume, Chin W. Chou, J.C. Koelemeij, A. Brusch, Sarah Bickman, Windell Oskay, Tara Michele Fortier, Jason Stalnaker, Scott A Diddams, Nathan Reynolds Newbury, William C Swann, Wayne M Itano, David J Wineland, James C Bergquist
Abstract: Repeated measurements of the frequency ratio of Hg^u+^ and Al^u+^ single-atom optical clocks over the course of a year yield a constraint on the possible temporal variation of the fine-structure constant a. The time variation of the measured ratio c ...

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