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Displaying 126 - 150 of 4257

Individual Ion Addressing with Microwave Field Gradients

April 26, 2013
Author(s)
Ulrich J. Warring, C. Ospelkaus, Yves Colombe, Robert Jordens, Dietrich G. Leibfried, David J. Wineland
… ion cooling, ion trapping, mechanical effects of light on ions, quantum … Individual Ion Addressing with Microwave Field Gradients …

Secondary Ion Mass Spectrometry Using Cluster Primary Ion Beams

January 1, 2003
Author(s)
John G. Gillen, Albert J. Fahey
… for conducting cluster SIMS experiments on both our ion microscope and TOF-SIMS instruments. This paper will review our recent work on cluster ion source development, elemental depth profiling with cluster primary ion beams and the use of cluster ion beams for organic …

A Standardized Interpolation of Temperature using Rhodium-Iron Resistance Thermometers over the Interval 4.2 K to 24.5 K

April 30, 2015
Author(s)
Weston L. Tew, Richard Rusby, Peng Lin, Peter Steur, L. Lipinski, Barrie W. Ricketson
… history and current state of development of rhodium-iron resistance thermometers (RIRTs) is briefly reviewed. A … Interpolation, Rhodium-Iron Resistance Thermometers, Low Temperature, Thermometry … A Standardized Interpolation of Temperature using Rhodium-Iron Resistance Thermometers over the Interval 4.2 K to 24.5 K …

Trapped-Ion State Detection through Coherent Motion

December 9, 2011
Author(s)
Till P. Rosenband, David Hume, Chin-Wen Chou, David R. Leibrandt, Michael J. Thorpe, David J. Wineland
… is the ability to detect the state of an individual ion. Current detection techniques 3–6 are applicable only to … coherent motion that can be applied to a larger class of ion systems. We couple a “spectroscopy” ion to a “control” ion in the same trap via mutual Coulomb …

Highly Charged Ions

January 1, 2001
Author(s)
John D. Gillaspy
… some of the fundamental properties of highly charged ions, the methods of producing them (with particular emphasis … charge-dependence, electron beam ion traps, highly charged ions, laboratory astrophysics, nanotechnology, nuclear … Highly Charged Ions …

High Fidelity Transport of Trapped-Ion Qubits through an X-Junction Trap Array

April 17, 2009
Author(s)
Brad R. Blakestad, Aaron Vandevender, Christian Ospelkaus, Jason Amini, Joseph W. Britton, Dietrich G. Leibfried, David J. Wineland
… computational fidelity and increases the time required for ion recooling. Here, we report reliable transport of 9 Be + … atom trapping and cooling, computation, ion transport, ion trap array, ion trap junction, quantum computation, … High Fidelity Transport of Trapped-Ion Qubits through an X-Junction Trap Array …

Quantum walk on a line for a trapped ion

October 30, 2009
Author(s)
Peng Xue, Barry Sanders, Dietrich Leibfried
… walk can be experimentally realized for a single trapped ion and how to interpolate between the quantum and random … of the quantum walk is manifested not only in the ion's position but also its phonon number, which makes an ion trap implementation of the quantum walk feasible. …

Trapped-Ion Quantum Logic Gates Based on Oscillating Magnetic Fields

August 29, 2008
Author(s)
Christian Ospelkaus, Christopher Langer, Jason Amini, Kenton R. Brown, Dietrich G. Leibfried, David J. Wineland
… and entangling multi-qubit quantum gates for trapped-ion quantum information processing (QIP). With fields … induced gates for realistic distances between the ion crystal and the electrode surface. … Trapped-Ion Quantum Logic Gates Based on Oscillating Magnetic Fields …

Pb(II) Adsorption on Isostructural Hydrated Alumina and Hematite (0001) Sur faces: A DFT Study

January 20, 2009
Author(s)
Sara E. Mason, Christopher R. Iceman, Kunaljeet Tanwar, Thomas P. Trainor, Anne M. Chaka
… density functional theory (DFT) calculations show that Pb(II) binds more strongly (by $\approx$30\%) to hematite than … the partially occupied Fe d-band. Site preference for Pb(II) adsorption on alumina is shown to depend strongly on the … Pb(II) Adsorption on Isostructural Hydrated Alumina and Hematite …

Exploration of the Structural Environment of the Iron-Sulfur Cluster in Putidaredoxin by Nitrogen-15 NMR Spectroscopy of Selectively Labeled Cysteine Residues

August 28, 1998
Author(s)
Fahriye N. Sari, Marcia J. Holden, M P. Mayhew, V L. Vilker, B Coxon
… Putidaredoxin is a di-iron protein whose paramagnetic region is not well … for both forms. Evidence for localized valencies of the iron atoms in the reduced form is presented. From the 15 N T … dependence, Curie dependence, cysteine, ferredoxins, iron-sulfur cluster, nitrogen-15 labeling, NMR, oxidized …

EUV Spectroscopy of Highly Charged Xenon Ions Created Using an Electron Beam Ion Trap

March 27, 2007
Author(s)
K Fahy, E Sokell, G O'Sullivan, A Aguilar, Joshua M. Pomeroy, Joseph N. Tan, John D. Gillaspy
… At the NIST Electron Beam Ion Trap (EBIT), extreme-ultraviolet spectra of xenon ions have been recorded using a flat-field spectrometer. The … clectron beam ion trap, Cowan code, EUV, extreme ultraviolet, highly charge ions, multiply charged ions, spectroscopy, Xenon …

Prospects for atomic clocks based on large ion crystals.

September 8, 2015
Author(s)
John J. Bollinger, Kyle Arnold, Elnur Haciyev, Chern Hui Lee, Eduardo Paez, M. D. Barrett
… feasibility of precision frequency metrology with large ion crystals. For clock candidates with a negative … small number of ions (3). These results hail a new era for ion-based atomic clocks, allowing them to achieve stability … atomic clocks, ion crystals, ion traps, optical frequency metrology, scalar …

EUV spectra of Rb-like to Ni-like dysprosium ions in an electron beam ion trap

August 12, 2014
Author(s)
Deirdre Kilbane, G. O'Sullivan, Yuri A. Podpaly, John D. Gillaspy, Joseph Reader, Yuri Ralchenko
… radiation emitted from highly-charged dysprosium ions was measured at the National Institute of Standards and Technology. The ions were created, trapped, and excited in an electron beam ion trap (EBIT), and the spectra were recorded with a … Dysprosium, spectra, extreme ultraviolet, electron beam ion trap …

Isotopic Metrology of Carbon Dioxide. II. Effects of Ion Source Materials, Conductance Emission, and Accelerating Voltage on Dual-Inlet Cross Contamination

June 1, 2003
Author(s)
R M. Verkouteren, S Assonov, D Klinedinst, W Brand
… isotope carbon dioxide measurements, made before and after ion source modification to gas isotope ratio mass … protocols were designed to explore the effects of ion surce material substitution, source conductance, inlet … times greater than 15 s, and different settings of ion source conductance resulted in delta- 13C shifts of about …

MOTIS: A Focused Ion Beam Source Based On Laser-Cooled Atoms

November 10, 2011
Author(s)
Brenton J. Knuffman, Adam V. Steele, Jon Orloff, Mostafa Maazouz, Jabez J. McClelland
… MOTIS: A Focused Ion Beam Source Based On Laser-Cooled Atoms … Focused ion beam, ion microscopy, laser cooling. … MOTIS: A Focused Ion Beam Source Based On Laser-Cooled Atoms …

Techniques for microwave near-field quantum control of trapped ions

January 31, 2013
Author(s)
Ulrich J. Warring, C. Ospelkaus, Yves Colombe, Kenton R. Brown, Jason Amini, M Carsjens, Dietrich G. Leibfried, David J. Wineland
… spin and motional degrees of freedom of one and two 25Mg+ ions enabled two-ion entanglement. In this report, we extend … ion cooling, ion trapping, mechanical effects of light on ions, quantum computation architectures and implementations, … for microwave near-field quantum control of trapped ions …

In Situ Imaging of Highly Charged Ion Irradiated Mica

January 1, 2001
Author(s)
L P. Ratliff, John D. Gillaspy
… surfaces due to the impact of Xe44+ ions by imaging the ion-exposed surfaces with atomic force microscopy in vacuum. … AFM, highly charged ion, mica … In Situ Imaging of Highly Charged Ion Irradiated Mica …
Displaying 126 - 150 of 4257
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