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Displaying 1001 - 1025 of 3841

Frequency Measurements of Al+ and Hg+ Optical Standards

June 8, 2009
Author(s)
Wayne M. Itano, James C. Bergquist, Till P. Rosenband, David J. Wineland, David Hume, Chin-wen Chou, Steven R. Jefferts, Thomas P. Heavner, Tom Parker, Scott Diddams, Tara Fortier
… aluminum ion, mercury ion, optical frequency standards, time variation of fundamental constants, trapped ion frequency standards …

Quantum Computation, Spectroscopy of Trapped Ions, and Schrodinger Cat

January 1, 1999
Author(s)
David J. Wineland, C Monroe, Wayne M. Itano, D Kielpinski, B E. King, C J. Myatt
… at NIST to implement quantum computation using trapped ions, based on a scheme proposed by J.I. Cirac and P. Zoller … Quantum Computation, Spectroscopy of Trapped Ions, and Schrodinger Cat …

An 27 Al+ quantum-logic clock with systematic uncertainty below 10 -18

July 15, 2019
Author(s)
Samuel M. Brewer, Jwo-Sy Chen, Aaron M. Hankin, Ethan Clements, Chin-wen Chou, David J. Wineland, David Hume, David Leibrandt
… a frequency stability of 1.2 X 10 -15 /(T 1/2 ). A 25 Mg + ion is simultaneously trapped with the 27 Al + ion and used for sympathetic cooling and state readout during … to previous 27Al+ clocks, enabling clock operation with ion motion near the three-dimensional ground state. Operating …

Temperature-Controlled Depth Profiling in Polymeric Biomaterials Using Cluster Secondary Ion Mass Spectrometry

July 1, 2006
Author(s)
Christine M. Mahoney, Albert J. Fahey, John G. Gillen, Chang Xu, J Batteas
… Secondary Ion Mass Spectrometry (SIMS) employing an SF5+ polyatomic primary ion source was used to depth profile through various … rates, damage cross sections, and overall secondary ion stability) were monitored as a function of temperature. … in Polymeric Biomaterials Using Cluster Secondary Ion Mass Spectrometry …

Enhanced Water Splitting Performance of Potassium-Adsorbed Titania Nanotube Arrays

December 7, 2009
Author(s)
Christiaan Richter, Cherno Jaye, Eugen Panaitescu, Daniel A. Fischer, Laura H. Lewis, Ronald J. Willey, Latika Menon
… of the external electrical bias needed to produce hydrogen at maximum efficiency. This result implies that the … electrical energy input required per liter of solar hydrogen produced with potassium-adsorbed titania nanotubes … potassium-free nanotubes to produce the same amount of hydrogen. Tailoring the potassium content may thus be an …

Microwave-Based Structure and Four-Simensional Morphed Intermolecular Potential for HI-CO 2

October 12, 2021
Author(s)
Wolfgang Jabs, Fabrice Willaert, Blake McElmurry, Luis Rivera-Rivera, Raffaele Montuoro, R R. Lucchese, J W. Bevan, R D. Suenram
… by a planar quasi T-shaped structure with the hydrogen atom tilted toward the CO2 moiety, separated by a … cm-1 with a planar quasi T-shaped structurewith the hydrogen atom tilted away from the CO2 moiety. The ground … carbon dioxide, hydrogen iodide, intermolecular forces, microwave …

Effect of Step Density and Orientation on the Apparent pH Dependence of Hydrogen and Hydroxide Adsorption on Stepped Platinum Surfaces

July 3, 2018
Author(s)
Ian McCrum, Xiaoting Chen, Kathleen Schwarz, Michael Janik, Marc Koper
… reactions in which surface-bonded intermediates (hydrogen and hydroxyl) play a crucial role, especially for fuel cells and hydrogen production. Here, with the support of a combination … Density and Orientation on the Apparent pH Dependence of Hydrogen and Hydroxide Adsorption on Stepped Platinum Surfaces …

Quantum interface between an electrical circuit and a single atom

March 30, 2012
Author(s)
Jacob M. Taylor, Dvir Kafri, David Kielpinski, G J. Milburn, M J. Woolley
… devices using the coupling between the motion of a single ion and the quantised electric field of the circuit. … coupling between the internal states of a single atomic ion and the electrical excitations of a superconducting … Ion traps, superconducting resonator, bulk acoustic waves …

Dataset from HDX-MS Studies of IgG1 Glycoforms and Their Interactions with the FcgR1a (CD64) Receptor

June 17, 2021
Author(s)
Kyle Anderson, Kerry Scott, Ioannis Karageorgos, Elyssia Gallagher, Venkata Tayi, Michael Butler, Jeffrey W. Hudgens
… This database gives hydrogen-deuterium exchange mass spectrometry (HDX-MS) data … runs of six exchange times. The data illuminate on the hydrogen exchange dynamics in isolated receptor, isolated … antibody-receptor interaction, chromatography, hydrogen-deuterium exchange, glycosylation, mass …

Color Quality and Spectra

July 1, 2008
Author(s)
Yoshihiro Ohno, Wendy L. Davis
Color quality, including white light chromaticity and color rendering performance, as well as luminous efficacy of radiation, for illumination sources are introduced. Spectral design considerations for white LED and solid-state lighting products to achieve

Nanointerface-Driven Reversible Hydrogen Storage in the Nanoconfined Li-N-H System

January 20, 2017
Author(s)
Brandon C. Wood, Vitalie Stavila, Natchapol Poonyayant, Tae-Wook Heo, Keith G. Ray, Leonard E. Klebanoff, Terrence J. Udovic, Jonathan R. I. Lee, Natee Angboonpong, Joshua D. Sugar, Pasit Pakawatpanurut
… hydrogen storage, interfaces, lithium amide, lithium hydride, … Nanointerface-Driven Reversible Hydrogen Storage in the Nanoconfined Li-N-H System …

Single-atom trapping in a metasurface-lens optical tweezer

August 1, 2022
Author(s)
Ting-Wei Hsu, Wenqi Zhu, Tobias Thiele, Mark Brown, Scott Papp, Amit Agrawal, Cindy Regal
Single neutral atoms in optical tweezers have become an important platform for quantum simulation, computing, and metrology [1-3]. With ground-up control similar to trapped ions, individual atoms can be prepared and entangled [2, 4, 5], and the scalability

Solution Structures of Bacillus Anthracis Protective Antigen Proteins using Small Angle Neutron Scattering and Protective Antigen 63 Ion Channel Formation Kinetics

December 11, 2021
Author(s)
Ariel Michelman-Ribeiro, Kenneth A. Rubinson, Vitalii Silin, John J. Kasianowicz
… are studying the structures of bacterial toxins that form ion channels and catalyze macromolecule transport across … alpha-hemolysin, anthrax, Bacillus anthracis, β-barrel, ion channel, pore forming toxin, PA63, PA83 … Small Angle Neutron Scattering and Protective Antigen 63 Ion Channel Formation Kinetics …

Electrospray Tandem Quadrupole Fragmentation of Quinolone Drugs and Related Ions. On the Reversibility of Water Loss from Protonated Molecules

November 30, 2010
Author(s)
Pedatsur Neta, Bhaskar Godugu, Yuxue Liang, Yamil Simon, Xiaoyu Yang, Stephen E. Stein
… The authors suggested formation of two singly protonated ions with different behavior, one undergoing loss of H 2 O … cone voltage as well. We further find that many fragment ions formed by loss of H 2 O can attach a water molecule in the collision cell, whereas ions formed by loss of CO 2 do not. Since re-attachment of H …

Filtering noise with a quantum probe

May 5, 2011
Author(s)
John J. Bollinger
… in general terms the ideas behind the manuscript "Single-ion quantum lock-in amplifier" by Kotler and colleagues which … of the valence electron spin of a single trapped strontium ion. … dynamical decoupling, ion trap, lock-in detection, quantum metrology, quantum …

Fundamental constants and tests of theory in Rydberg states of one-electron ions

March 19, 2010
Author(s)
Ulrich D. Jentschura, Peter Mohr, Joseph N. Tan
… of the theory of circular Rydberg states of hydrogenlike ions allows highly-accurate predictions to be made for energy … can be increased by utilizing a variety of combinations of ions and Ryberg states to determine fundamental constants and … and tests of theory in Rydberg states of one-electron ions …
Displaying 1001 - 1025 of 3841
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