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Displaying 301 - 325 of 2768

Indirect Cooling of Weakly Coupled Trapped-Ion Mechanical Oscillators

April 2, 2024
Author(s)
Panyu Hou, Jenny Wu, Stephen Erickson, Giorgio Zarantonello, Adam Brandt, Daniel Cole, Andrew C. Wilson, Daniel Slichter, Dietrich Leibfried
… with weak or zero cooling radiation interaction in two-ion and three-ion crystals of the same and mixed ion species, specifically 9Be+-9Be+, 9Be+-25Mg+, and … Indirect Cooling of Weakly Coupled Trapped-Ion Mechanical Oscillators …

Dynamics of Hydride Ions in Metal Hydride-Reduced BaTiO 3 Samples Investigated with Quasielastic Neutron Scattering

January 31, 2019
Author(s)
Carin Eklof-Osterberg, Reji Nedumkandathil, Ulrich Haussermann, Aleksander Jaworski, Andrew J. Pell, Madhu Sudan Tyagi, Niina H. Jalarvo, Bernhard Frick, Antonio Faraone, Maths Karlsson
… are characterized by the simultaneous presence of hydride ions and oxygen vacancies. Measurements of elastic fixed … neutron scattering, dynamics, hydride ions … Dynamics of Hydride Ions in Metal Hydride-Reduced BaTiO 3 Samples Investigated …

Radiation From k-Shell Filling in Highly Charged Ions: A Driver for Resonant Combination Cancer Therapy?

October 12, 2021
Author(s)
A P. Kavanagh, John D. Gillaspy, D G. Hirst, M H. Mendenhall, N Nakamura, S Ohtani, H Wantanabe, F J. Currell
… using radiation from bare and hydrogen-like highly-charged ions as a driver for a proposed form of cancer therapy is … cancer, high charged ions, radiation therapy, radiotherapy … Radiation From k-Shell Filling in Highly Charged Ions: A Driver for Resonant Combination Cancer Therapy? …

Effects of Incorporating Nano-Sized Monocalcium Phosphate Monohydrate Fillers on Whisker-Reinforced Dental Composites

August 21, 2006
Author(s)
Hockin D. Xu, Limin Sun, Michael Weir, Shozo Takagi, P P. Chow, B Hockey
… through the addition of nano particles of monocalcium phosphate monohydrate (MCPM), dicalcium phosphate anhydrous (DCPA), and tetracalcium phosphate (TTCP). The specific goal of this pilot study was … Effects of Incorporating Nano-Sized Monocalcium Phosphate Monohydrate Fillers on Whisker-Reinforced Dental …

Arbitrary waveform generator for quantum information processing with trapped ions

March 20, 2013
Author(s)
Ryan S. Bowler, Ulrich J. Warring, Joseph W. Britton, J. M. Amini
… Ions confined in a multi-electrode trap design have been … information processing. This scheme involves transporting ions between spatially distinct locations using time varying … much faster than relevant motional frequencies of confined ions and ion internal state manipulations for our systems, …

Impact of Monovalent Counter-ions on the Conformation of Flexible Polyelectrolytes Having Different Molecular Architectures

February 10, 2016
Author(s)
Alexandros Chremos, Jack F. Douglas
… We explore the condensation of monovalent counter-ions on the molecular conformation of highly charged flexible … In particular, we investigate how the counter-ions on the polyelectrolytes influence the average molecular … by calculating the average number of interfacial counter-ions, as well as the degree of coiling of the …

A Microfabricated Surface-Electrode Ion Trap for Scalable Quantum Information Processing

June 30, 2006
Author(s)
Signe Seidelin, J Chiaverini, Rainer Reichle, John J. Bollinger, Dietrich G. Leibfried, Joseph W. Britton, Janus Wesenberg, Brad R. Blakestad, John D. Jost, David Hume, C. Langer, R Ozeri, Nobuyasu Shiga, David J. Wineland
… quantum information processing, scalable ion traps, surface traps … A Microfabricated Surface-Electrode Ion Trap for Scalable Quantum Information Processing …

A Microfabricated Surface-Electrode Ion Trap for Scalable Quantum Information Processing

June 30, 2006
Author(s)
Signe Seidelin, J Chiaverini, Rainer Reichle, John J. Bollinger, Dietrich G. Leibfried, Joseph W. Britton, Janus Wesenberg, Brad R. Blakestad, John D. Jost, David Hume, C. Langer, R Ozeri, Nobuyasu Shiga, David J. Wineland
… quantum information processing, scalable ion traps, surface traps … A Microfabricated Surface-Electrode Ion Trap for Scalable Quantum Information Processing …

On the Sub-Nanometer Resolution of Scanning Electron and Helium Ion Microscopes

March 1, 2009
Author(s)
Andras Vladar, Michael T. Postek, Bin Ming
… better and better resolution with various electron and ion microscopes and to monitor and maintain these instruments … reproducibly the resolution of scanning electron and ion microscopes. … Helium ion microscope, metrology, sharpness, resolution, scanning … Sub-Nanometer Resolution of Scanning Electron and Helium Ion Microscopes …

Understanding Imaging and Metrology with the Helium Ion Microscope

March 1, 2009
Author(s)
Michael T. Postek, Andras Vladar, Bin Ming
… microscopy, scanning tunneling microscopy and focused ion beam microscopes have all been applied to nanotechnology … new tool for nanotechnology is the scanning helium ion microscope (HIM). The HIM is a new complimentary imaging … imaging and metrology with this instrument entails new ion beam/specimen interaction physics which must be fully …

Ultra-small-Angle X-ray Scattering - X-ray Photon-Correlation Spectroscopy Studies of Incipient Structural Changes in Amorphous Calcium Phosphate Based Dental Composites

February 28, 2012
Author(s)
Fan Zhang, Andrew Allen, Lyle E. Levine, Laura Espinal, Joseph M. Antonucci, Drago Skrtic, Justin N. O'Donnell, Jan Ilavsky
… The local structural changes in amorphous calcium phosphate (ACP) based dental composites were studied upon … X-ray photon correlation spectroscopy, amorphous calcium phosphate, polymer dental composites, non-equilibrium … of Incipient Structural Changes in Amorphous Calcium Phosphate Based Dental Composites …

Optimal Surface-Electrode Trap Lattices for Quantum Simulation with Trapped Ions

June 12, 2009
Author(s)
Roman Schmied , Janus H. Wesenberg, Dietrich Leibfried
… Trapped ions offer long internal state (spin) coherence times and … lattices. To this end it is desirable to be able to trap ions in arbitrary conformations with precisely controlled … Trap Lattices for Quantum Simulation with Trapped Ions …

Trapped Ion Quantum Information Processing with Squeezed Phonons

January 24, 2019
Author(s)
Wenchao Ge, Brian Sawyer, Joseph W. Britton, Kurt Jacobs, John Bollinger, Michael Foss-Feig
… strategy to enhance the coherent interactions in trapped-ion systems via parametric amplification of the ions' motion: … improve the speed and fidelity of two-qubit gates in multi-ion systems, an important ingredient for scalable trapped ion quantum computation. Our results are also directly …

Multi-element logic gates for trapped-ion qubits

December 17, 2015
Author(s)
Ting Rei Tan, John P. Gaebler, Yiheng Lin, Yong Wan, Ryan S. Bowler, Dietrich G. Leibfried, David J. Wineland
… An entangling geometric phase gate between a 9 Be + ion and a 25 Mg + ion employing state-dependent forces is realized through a … Bell-inequality test on Bell states composed of different ion species. … Multi-element logic gates for trapped-ion qubits …

Measurement of the D Line Doublet in High-Z Highly-Charged Sodium-like Ions

July 8, 2009
Author(s)
John D. Gillaspy, Ilija Draganic, Yuri Ralchenko, Joseph Reader, Joseph N. Tan, Joshua M. Pomeroy, Samuel M. Brewer
… a direct observation of the D line doublet of sodium-like ions with Z≥72. Spectra in the 1 nm to 9 nm spectral range … widely split doublet for Hf61+, Ta62+, W63+,and Au68+. The ions were produced and confined in an electron beam ion trap … for several transitions in Si-like, Al-like, and Mg-like ions. …

New Ion Source for High Precision FIB Nanomachining and Circuit Edit

December 31, 2014
Author(s)
Adam V. Steele, Brenton Knuffman, Jabez J. McClelland
… We present a review of the Low Temperature Ion Source (LoTIS): its aims, design, performance data … Focused ion beam, FIB, SIMS, ion source, laser cooling, cold atom ion source, LOTIS … New Ion Source for High Precision FIB Nanomachining and Circuit …

Infrared and visible laser spectroscopy for highly-charged Ni-like ions

April 12, 2017
Author(s)
Yuri Ralchenko
… or infrared (IR) lasers for spectroscopy of highly-charged ions (HCI) has not been particularly extensive so far due to … within the first excited configuration 3d9.4s in Ni-like ions of heavy elements from Z_N =60 to Z_N =92 is within the … highly-charged ions, Ni-like ions, forbidden transitions, visible and …

Summary of ISO/TC 201 Standard: XIII. ISO 18114:2003 - Surface Chemical Analysis - Secondary Ion Mass Spectrometry - Determination of Relative Sensitivity Factors From Ion-Implanted Reference Materials

March 1, 2006
Author(s)
David S. Simons
… Ion-implanted materials are commonly used in secondary-ion mass spectrometry for the calibration of instruments. … factor (RSF) of an element in a specified matrix from an ion-implanted reference material, and to show how the … ion implantation, reference material, relative sinsitivity …

GPS Integrity Architecture Opportunities

September 16, 2013
Author(s)
Marc A. Weiss, Calvin Miles, Karl J. Kovach, John Dobyne, Karen Van Dyke
… ION GNSS 2013 … Proceedings of the 2013 ION GNSS meeting …

A Laser-Cooled Frequency Standard for GPS

September 20, 2011
Author(s)
Thomas P. Heavner, Stephan E. Barlow, Marc A. Weiss, Neil Ashby, Steven R. Jefferts
… ION GNSS 2011 … Proceedings of the ION GNSS 2011 Conference …

Ferrous Ions as Catalysts for Photochemical Reduction of CO 2 in Homogeneous Solutions

May 1, 2000
Author(s)
J Grodkowski, Pedatsur Neta
… Ferrous ions are found to act as efficient catalysts for the … to form the radical anion, TP. - , which reduces Fe(II) ions. The rate constant for this reaction was determined by … and found to be 1.2 x 10 8 L mol -1 s -1 . The Fe(I) ions produced are expected to react with CO 2 to form an …

Unexpected Peaks in Tandem Mass Spectra due to Reaction of Product Ions with Water in Mass Spectrometer Collision Cells

December 15, 2014
Author(s)
Pedatsur Neta, Mahnaz Farahani, Yamil Simon, Yuxue Liang, Xiaoyu Yang, Stephen E. Stein
… While determining the fragmentation pathways of positive ions of drugs, pesticides, metabolites, and other compounds, … mass spectrometry, we noticed that certain product ions react with water in the collision cell. This reaction is … of species that cannot be formed from the precursor ions by known fragmentation pathways. As a result, tandem …

Arrays of individually controlled ions suitable for two-dimensional quantum simulations

June 13, 2016
Author(s)
Manuel Mielenz, Henning Kalis, Matthias Wittemer, Frederick Hakelberg, Roman Blain, Peter Maunz, Dietrich Leibfried, Tobias Schaetz
… Here we characterise two-dimensional arrays of three ions trapped by radio-frequency fi elds in individually … state, as well as tuning of crucial couplings between ions within experimental sequences. Our work paves the way … analog quatum simulation, quantum control, trapped ions …
Displaying 301 - 325 of 2768
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