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Search Publications

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Displaying 401 - 425 of 3756

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 …

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 …

Ultrafast Terahertz Spectroscopy: Measuring Low-Frequency Vibrational Modes of Hydrogen-Bonded Systems

July 1, 2000
Author(s)
D A. McWhorter, Alan L. Migdall, Edwin J. Heilweil
… Spectrometer characteristics and absorption spectra of hydrogen-bonded dimers in condensed phases will be presented. … biological molecules, far-infrared, far-infrared lasers, hydrogen-bonded systems, spectroscopy, terahertz, vibrational … Spectroscopy: Measuring Low-Frequency Vibrational Modes of Hydrogen-Bonded Systems …

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 …

Solidification of a heterogeneous Multiphase Laves-based Hydrogen Storage Alloy

August 15, 2010
Author(s)
William J. Boettinger, Dale E. Newbury, Ke Wang, Leonid A. Bendersky, Chun Chiu, Ursula R. Kattner, K. Young, B. Chao
… of a nine-element Zr-Ni based AB(sub 2) type C14/C15 Laves hydrogen storage alloy is determined. The selected … Phase diagram, Sodification, Hydrogen storage, Microprobe analysis … Solidification of a heterogeneous Multiphase Laves-based Hydrogen Storage Alloy …

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 …

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 …

A Flexible Microporous Hydrogen-Bonded Organic Framework for Gas Sorption and Separation

August 12, 2015
Author(s)
Hailong Wang, Bin Li, Hui Wu, Tong-Liang Hu, Zizhu Yao, Wei Zhou, Shengchang Xiang, Banglin Chen
… A microporous three-dimensional hydrogen-bonded organic framework (HOF-5) has been … Hydrogen-Bonded Organic Framework, porous material, gas … A Flexible Microporous Hydrogen-Bonded Organic Framework for Gas Sorption and …

Conductance and ion selectivity of a mesoscopic protein nanopore probed with cysteine scanning mutagenesis

November 1, 2005
Author(s)
Petr Merzlyak, Maria-Fatima P. Capistrano, Angela Valeva, John J. Kasianowicz, Oleg V. Krasilnikov
… Nanometer-scale, proteinaceous pores are the basis of ion and macromolecular transport in cells and organelles. Recent studies suggest that ion channels and synthetic nanopores may prove useful in … relationship of nanopores, we are studying the ion conducting properties of channels formed by wild-type and …

High-fidelity indirect readout of trapped-ion hyperfine qubits

April 21, 2022
Author(s)
Stephen Erickson, Jenny Wu, Panyu Hou, Daniel Cole, Shawn Geller, Alexander Kwiatkowski, Scott Glancy, Emanuel Knill, Daniel Slichter, Andrew C. Wilson, Dietrich Leibfried
… a protocol for high-fidelity indirect readout of trapped ion hyperfine qubits, where the state of a 9Be+ qubit ion is mapped to a 25Mg+ readout ion using laser-driven Raman transitions. By partitioning the … High-fidelity indirect readout of trapped-ion hyperfine qubits …

Electrochemical intercalation of lithium ions into NbSe2 nanosheets

September 21, 2016
Author(s)
Albert Davydov, Anand V. Patel, Louisa Meshi, Emily Hitz, Liangbing Hu
… study. We demonstrate successful intercalation of Li-ions into NbSe2 and confirm this result through X-ray … Electrochemical intercalation of lithium ions into NbSe2 nanosheets …
Displaying 401 - 425 of 3756
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