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Topic Area: Atomic Physics

Displaying records 31 to 40 of 79 records.
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31. Multi-channel modeling of the formation of vibrationally cold polar KRb molecules.
Topic: Atomic Physics
Published: 5/14/2009
Authors: Svetlana Kotochigova, Eite Tiesinga, Paul S Julienne
Abstract: We describe the theoretical advances that influenced the experimental creation of vibrationally and translationally cold polar 40K87Rb molecules [Nature Phys. 4, 622 (2008), Science 322, 231 (2008)]. Cold molecules were created from very-weakly boun ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901233

32. Rotation induced superfluid-normal phase separation in trapped Fermi gases
Topic: Atomic Physics
Published: 5/13/2009
Authors: Menderes Iskin, Eite Tiesinga
Abstract: We use the Bogoliubov-de Gennes formalism to analyze the effects of adiabatic rotation on the ground state phases of harmonically trapped Fermi gases. We find that the rotation breaks Cooper pairs that are located near the trap edge, and that this le ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900933

33. Prediction of Feshbach resonances from three input parameters
Topic: Atomic Physics
Published: 4/30/2009
Authors: Thomas Mark Hanna, Eite Tiesinga, Paul S Julienne
Abstract: We have developed a model of Feshbach resonances in gases of ultracold alkali metal atoms using the ideas of quantum defect theory. Our model requires just three parameters - the singlet and triplet scattering lengths, and the coefficient of the long ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901501

34. Optical detection of NMR ^dJ^{math minus}spectra at zero magnetic field
Topic: Atomic Physics
Published: 3/28/2009
Authors: M Ledbetter, C.W. Crawford, A Pines, D.E. Wemmer, Svenja A Knappe, John E Kitching, D Budker
Abstract: Nuclear magnetic resonance (NMR) has emerged as one of the most powerful analytical tools for elucidating molecular structure. One of the parameters typically extracted from NMR spectra which is necessary to fully understand the structure of a molec ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842586

35. Weight Functions for Biases in Atomic Frequency Standards
Topic: Atomic 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

36. Ratio of the Al^u+^ and Hg^u+^ Optical Clock Frequencies to 17 Decimal Places
Topic: Atomic Physics
Published: 8/25/2008
Authors: Wayne M Itano, Till P Rosenband, David Hume, P.O. Schmidt, Chin W. Chou, A. Brusch, Luca Lorini, Windell Oskay, Robert E. Drullinger, Sarah Bickman, Tara Michele Fortier, Jason Stalnaker, Scott A Diddams, William C Swann, Nathan Reynolds Newbury, David J Wineland, James C Bergquist
Abstract: Frequency standards (atomic clocks) based on narrow optical transitions in ^u27^Al^u+^ and ^u199^Hg^u+^ have been developed over the past several years at NIST. These two types of standards are both based on single ions confined in Paul traps, but di ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842568

37. Robust Optical Design of Angled Multilayer Dielectric Mirrors Optimized for Rubidium Vapor Cell Return Reflection
Topic: Atomic Physics
Published: 8/1/2008
Authors: M A Perez, John E Kitching, A Shkel
Abstract: This paper reports on the design and implementation of thin film multilayer dielectric reflectors on the sidewalls of micromachined reflector cells. Due to shadowing within the cavity, significant variations in the thicknesses of the thin films will ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842429

38. Quantum key distribution at GHz transmission rates
Topic: Atomic Physics
Published: 2/11/2008
Authors: Alessandro Restelli, Joshua C Bienfang, Alan Mink, Charles W Clark
Abstract: Quantum key distribution (QKD) channels are typically realized by transmitting and detecting single photons, and therefore suffer from dramatic reductions in throughput due to both channel loss and noise. These shortcomings can be mitigated by applyi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901213

39. Spin-resolved Superelastic Electron Scattering from Laser Excited Chromium Atoms
Topic: Atomic Physics
Published: 11/14/1993
Authors: G Hanne, Jabez J McClelland, R E. Scholten, Robert Celotta
Abstract: Superelastic scattering of polarized electrons from laser-excited polarized chromium atoms (4^u7^P^uo^^d4^ {rarr} 4^u7^S^d3^ transition, energy gain 2.92 eV) has been measured for total collision energies of 6.8 and 13.6 eV (0.5 and 1.0 Ryd) and scat ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=620431

40. Uncertainty Intervals for Polarized Beam Scattering Asymmetry Statistics
Topic: Atomic Physics
Published: 7/1/1993
Authors: Kevin J Coakley, Jabez J McClelland, Michael H Kelley, Robert Celotta
Abstract: In many scattering experiments, the quantity of most direct physical interest is a measure of the difference between two closely related scattering signals, each generated by a Poisson scattering process. This difference is often expressed in terms o ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=620420



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