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NIST Authors in Bold

Displaying 451 - 475 of 4633

Jean Dalibard, the magneto-optical trap, and the ascent of physics with cold atomic gases

May 31, 2024
Author(s)
William D. Phillips
… of the invention by Jean Dalibard of the magneto-optical trap (MOT), which has for many years been the "workhorse" of … Jean Dalibard, magneto-optical trap, MOT, laser cooling and trapping, radiation-pressure trap, optical Earnshaw theorem … Jean Dalibard, the magneto-optical trap, and the ascent of physics with cold atomic gases …

Randomized Benchmarking of Quantum Gates

January 1, 2007
Author(s)
Emanuel Knill, D. Leibfried, R. Reichle, J. Britton, R. B. Blakestad, J. D. Jost, C. Langer, R Ozeri, Signe Seidelin, David J. Wineland
… We implemented randomized benchmarking on trapped atomic ion qubits, establishing a one-qubit error probability per … ion traps, quantum computing, quantum errors., quantum gates …

A COLD-ATOM CLOCK BASED ON COHERENT POPULATION TRAPPING

November 26, 2012
Author(s)
Elizabeth A. Donley, Francois-Xavier R. Esnault, Eric M. Blanshan, John E. Kitching
… A compact cold-atom clock based on coherent population trapping is being developed. The clock aims to ultimately … Atomic Clocks, Coherent Population Trapping … A COLD-ATOM CLOCK BASED ON COHERENT POPULATION TRAPPING …

Onset of Fermi Degeneracy in a Trapped Atomic Gas

September 1, 1999
Author(s)
B. L. DeMarco, Deborah S. Jin
… Fermi gas was employed to cool a magnetically trapped gas of 7 x 10 5 40 K atoms to 0.5 of the Fermi … Onset of Fermi Degeneracy in a Trapped Atomic Gas …

Entangled States of Atomic Ions for Quantum Metrology and Computation

January 1, 1996
Author(s)
David J. Wineland, C Monroe, D M. Meekhof, B E. King, Dietrich G. Leibfried, Wayne M. Itano, James C. Bergquist, D J. Berkeland, John J. Bollinger, J D. Miller
… in realizing, quantum logic based on multiple trapped ions. … Entangled States of Atomic Ions for Quantum Metrology and Computation …

Mobilities and Formation Kinetics of NH 4 + (NH 3 ) n Cluster Ions (n=0-3) in helium and helium/ammonia mixtures

January 1, 1997
Author(s)
M Krishnamurthy, J A. de Gouw, L N. Ding, V M. Bierbaum, S R. Leone
… NH 4 + (NH 3 ) n (n=1-3) cluster ions are formed in a field free flow tube section of a … measurements. The zero-field mobilities of the cluster ions in helium (22.1 +or-}0.3 cm 2 V -1 s -1 for NH 4 + , … of the geometric cross sections of the different cluster ions. The zero-field mobilities of NH 4 + (0.94 +or-} 0.15 cm …

Measurements of 25 Mg + and 27 Al + magnetic constants for improved ion clock accuracy

July 15, 2019
Author(s)
Samuel M. Brewer, Jwo-Sy Chen, Aaron M. Hankin, Ethan Clements, Chin-wen Chou, Kyle Beloy, Will McGrew, Xiaogang Zhang, Robert J. Fasano, Daniele Nicolodi, Holly Leopardi, Tara Fortier, Scott Diddams, Andrew Ludlow, David J. Wineland, David Leibrandt, David Hume
… 358(60) X 10-5 and the nuclear g-factor for the free 25Mg+ ion gI' = 1.861 957 83(28) X 10-4. … of 25 Mg + and 27 Al + magnetic constants for improved ion clock accuracy …

Measuring the difference in nuclear charge radius of Xe isotopes by EUV spectroscopy of highly charged Na-like ions

November 5, 2018
Author(s)
Roshani Silwal, A. Lapierre, John D. Gillaspy, Joan M. Dreiling, S A. Blundell, Dipti Goyal, A. Borovik, Jr., G Gwinner, A.C.C. Villari, Yuri Ralchenko, Endre Takacs
… extreme ultraviolet spectroscopy of highly charged Na-like ions. The isotope shift of the Na-like D1 (3s 2S1/2 − 3p … EUV spectroscopy, Na-like ions, highly charged ions, EBIT, nuclear radius Category, atomic physics, atomic … Xe isotopes by EUV spectroscopy of highly charged Na-like ions …

Inelastic Neutron Scattering on Polymer Electrolytes for Lithium-Ion Batteries

May 7, 2012
Author(s)
Huagen H. Peng, Madhu Sudan Tyagi, Kirt A. Page, Christopher Soles
… The relationship between ion transport and polymer dynamics is central to the pursuit … solid polymer electrolyte systems of sufficiently high ion conductivities. Solid polymer electrolytes are highly … liquid electrolytes that are used today in commercial Li+ ion battery systems. Here we introduce inelastic neutron …

Hydrodynamic Fractionation of Finite Size Nano Gold Clusters

June 15, 2011
Author(s)
De-Hao D. Tsai, Tae Joon Cho, Frank W. DelRio, Julian S. Taurozzi, Michael R. Zachariah, Vincent A. Hackley
… and characterization of functional nanoscale gold clusters (NGCs) based on asymmetric-flow field flow … electrospray, differential mobility analyzer, microscopy, gold, nanoparticle, aggregate, cluster, spectroscopy. … Hydrodynamic Fractionation of Finite Size Nano Gold Clusters …

The Use of an SF5+ Primary Ion Beam for Ultra Shallow Depth Profiling on an Ion Microscope SIMS Instrument

October 16, 2008
Author(s)
J Greg Gillen, Marlon L. Walker, P E. Thompson, J Bennett
… has been fitted with a modified hot filament duoplasmatron ion source for generation of SF 5 + primary ion beams for SIMS depth profiling applications. The SF 5 + primary ion beam has been evaluated by depth profiling of several low … polyatomic primary ions, secondary ion mass spectrometry, sulfur hexafluoride, ultra shallow …

Optimize Noise Filtration through Dynamical Decoupling

July 24, 2009
Author(s)
Hermann Uys, Michael J. Biercuk, John J. Bollinger
… phase errors through experimental measurements on 9Be u+ ion qubits in a Penning trap. Our combined theoretical and experimental studies show … decoherence, dynamical decoupling, Penning ion trap, quantum information, spin-echo …

NIST/NRC-Canada Interlaboratory Comparison of Guarded Hot Plate Measurements: 1993-1997

June 1, 1997
Author(s)
Robert R. Zarr, M K. Kumaran, E S. Lagergren
… silica. The measurements were determined using guarded hot plate apparatus at the National Institute of Standards and … silica, building technology, glass fiber, guarded hot plate apparatus, insulation, interlaboratory, international, … NIST/NRC-Canada Interlaboratory Comparison of Guarded Hot Plate Measurements: 1993-1997 …

A Compact Cold-Atom Frequency Standard Based on Coherent Population Trapping

May 24, 2012
Author(s)
Francois-Xavier R. Esnault, John Kitching, Elizabeth Donley
… status of our cold-atom clock based on coherent population trapping, including the present clock stability and a … Atomic Clocks, Coherent Population Trapping … Cold-Atom Frequency Standard Based on Coherent Population Trapping …

Mobilities of aromatic ions drifting in helium

October 12, 2021
Author(s)
M Krishnamurthy, J A. de Gouw, V M. Bierbaum, S R. Leone
… tube (SIFDT) apparatus. The reduced mobilities of these ions in helium are measured as a function of the … in the drift tube). The reduced mobilites of the dimer ions are compared with the measured mobilities of naphthalene … cross sections computed from the geometric structures of ions using a hard sphere model. The results suggest that the …

Advances in Coherent Population Trapping for Atomic Clocks

August 10, 2010
Author(s)
John E. Kitching, Vishal Shah
… We review advances in the field of coherent population trapping (CPT) over the last decade with respect to the … of both the basic phenomenon of coherent population trapping how it has traditionally been used in atomic clocks. … atomic clock, coherent population trapping, electromagnetically induced transparency, frequency …

Photo-induced transformations of polyvinylpyrrolidone coatings on gold nanoparticles and effects on colloidal stability

July 28, 2017
Author(s)
Stacey M. Louie, Justin Gorham, Jiaojie Tan, Vincent A. Hackley
… of polyvinylpyrrolidone (PVP) coatings on gold nanoparticles (AuNPs) under ultraviolet (UV) irradiation … nanomaterial, gold nanoparticle, polyvinylpyrrolidone, coating, stability, … transformations of polyvinylpyrrolidone coatings on gold nanoparticles and effects on colloidal stability …

S and Si Ion-Implantation in GaSb Grown on GaAs

December 1, 1999
Author(s)
M V. Rao, A K. Berry, T Q. Do, M C. Ridgway, P Chi, J Waterman
… Single and multiple energy S and Si ion-implantations were performed at room temperature (RT) and … with a Si 3 N 4 cap at 400-600 C for 5 min. Secondary ion mass spectrometry measurements indicated thermal … doping, ion-implantation, secondary ion mass spectrometry …

A single-atom optical clock with high accuracy

July 14, 2006
Author(s)
Windell Oskay, Scott A. Diddams, Elizabeth A. Donley, Tara M. Fortier, Thomas P. Heavner, Leo W. Hollberg, Wayne M. Itano, Steven R. Jefferts, M J. Jensen, Kyoungsik Kim, F Levi, Thomas E. Parker, James C. Bergquist
… transition in a single, laser-cooled, trapped mercury ion. In this comparison, the fractional systematic frequency … conclusively that frequency control in the mercury-ion system is possible at a level superior to that of the … cesium fountain, femtosecond laser frequency comb, mercury-ion frequency standard, optical frequency standard, …

Progress Towards a Precision Measurement of the Neutron Lifetime Using Magnetically Trapped Ultracold Neutrons

January 1, 2006
Author(s)
P.-N. Seo, Kevin Coakley, J M. Doyle, F H. DuBose, R Golub, E Korobkina, S K. Lamoreaux, Hans Pieter Mumm, C M. O'Shaughnessy, G R. Palmquis, A K. Thompson, Grace L. Yang, L Yang, Paul R. Huffman
… As part of an on-going program utilizing magnetically trapped ultracold neutrons (UCNs,) we are developing a … of 0.89 nm neutrons with phonons in superfluid 4He. Trapped neutrons are detected when they decay; charged decay … Measurement of the Neutron Lifetime Using Magnetically Trapped Ultracold Neutrons …
Displaying 451 - 475 of 4633
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