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

Displaying records 311 to 319.
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311. Wavelength references for 1300-nm wavelength division multiplexing
Topic: Physics
Published: 5/1/2002
Authors: Tasshi Dennis, E. A. Curtis, C. W. Oates, Leo W. Hollberg, Sarah L. Gilbert
Abstract: We have conducted a study of potential wavelength calibration references for use as both moderate-accuracy transfer standards and high-accuracy National Institute of Standards and Technology (NIST) internal references in the 1280-1320 nm wavelength-d ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=30133

312. Wavelength standards for optical communications
Topic: Physics
Published: 1/1/2001
Authors: Sarah L. Gilbert, William C Swann, Tasshi Dennis
Abstract: We review wavelength accuracy and calibration issues for wavelength division multiplexed (WDM) optical fiber communication and describe our work on wavelength calibration references. We have developed wavelength references for National Institute of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=24202

313. Wavelengths, Transition Probabilities, and Energy Levels for the Spectra of Barium (Ba III through Ba LVI)
Topic: Physics
Published: 11/19/2010
Authors: Jean Ellen Sansonetti, John J Curry
Abstract: Energy levels, with designations and uncertainties, have been compiled for the spectra of barium (Z=56) ions from doubly-ionized to hydrogen-like. Wavelengths with classifications, intensities, and transition probabilities are also tabulated. In addi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904125

314. Weak Localization, Spin Relaxation, and Spin-Diffusion: Crossover Between Weak and Strong Rashba Coupling Limits
Topic: Physics
Published: 9/17/2014
Authors: Yasufumi Araki, Guru Bahadur S Khalsa, Allan H. MacDonald
Abstract: Disorder scattering and spin-orbit coupling are together responsible for the diffusion and relaxation of spin-density in time-reversal invariant systems. We study spin-relaxation and diffusion in a two-dimensional electron gas with Rashba spin-orbit ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916181

315. Weight Functions for Biases in Atomic Frequency Standards
Topic: Physics
Published: 10/5/2008
Author: Jon Hardy Shirley
Abstract: We present a unified treatment of frequency-standard biases that vary significantly during the time of measurement. We introduce three time-dependent weight functions built from the solution of the unperturbed equations of motion for a two-level sys ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900983

316. Weight Functions for Biases in Atomic Frequency Standards
Topic: Physics
Published: 3/1/2010
Author: Jon Hardy Shirley
Abstract: Many perturbations that affect atomic frequency standards vary during the period of measurement. To include this time variation, we introduce three time-dependent weight functions built from the solution of the unperturbed equations of motion of a t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902850

317. When does a branched polymer becomes a particle?
Topic: Physics
Published: 9/17/2015
Authors: Alexandros Chremos, Jack F Douglas
Abstract: Melts with topologically distinct molecular structures are investigated by molecular dynamics simulation. We determine the mean polymer size and shape, and glass transition temperature for each molecular topology. Both in terms of structure and dynam ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=918746

318. Yb Optical Lattice Clock
Topic: Physics
Published: 11/23/2008
Authors: Nathan D. Lemke, Andrew D Ludlow, Zeb Barber, N Poli, C.W. Hoyt, Long-Sheng Ma, Jason Stalnaker, Christopher W Oates, Leo Hollberg, James C Bergquist, A. Brusch, Tara Michele Fortier, Scott A Diddams, Thomas Patrick Heavner, Steven R Jefferts, Thomas Edward Parker
Abstract: We describe the development and latest results of an optical lattice clock based on neutral Yb atoms, including investigations based on both even and odd isotopes. We report a fractional frequency uncertainty below 10^u-15^ for ^u171^Yb.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901008

319. Zero-energy modes and gate-tunable gap in graphene on hexagonal boron nitride
Topic: Physics
Published: 9/13/2012
Authors: Markus Kindermann, Bruno Uchoa, David L. Miller
Abstract: In this article, we derive an effective theory of graphene on a hexagonal boron nitride (h-BN) substrate. We show that the h-BN substrate generically opens a spectral gap in graphene despite the lattice mismatch. The origin of that gap is particularl ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911095



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