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Displaying 276 - 300 of 4258

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 …

Domain effects in Faraday effect sensors based on iron garnets

February 1, 1995
Author(s)
M. N. Deeter
… Domain-induced diffraction effects produced by two iron garnet thick films and two bulk crystals are compared. … agreement with a one-dimensional diffraction model. Bulk iron garnet crystals, which exhibited a complex … Domain effects in Faraday effect sensors based on iron garnets …

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 …

Flame Inhibition by Ferrocene, Carbon Dioxide, and Trifluoromethane Blends: Synergistic and Antagonistic Effects

October 11, 1999
Author(s)
Gregory T. Linteris, M D. Rumminger
… production of CF3Br has been banned. As a flame inhibitor, iron pentacarbonyl (Fe(CO)5) is about two orders of magnitude … ppm does not further reduce the burning velocity. Tf other iron compounds can be identified which show the same strong … far less toxic than Fe(CO)5, and it may produce the same iron-containing intermediates. Here, we present the first …

Flame Inhibition by Ferrocene, Carbon Dioxide, and Trifluoromethane Blends: Synergistic and Antagonistic Effects (NISTIR 6359)

October 1, 1999
Author(s)
Gregory T. Linteris, M D. Rumminger
… production of CF3Br has been banned. As a flame inhibitor, iron pentacarbonyl (Fe(CO)5) is about two orders of magnitude … ppm does not further reduce the burning velocity. Tf other iron compounds can be identified which show the same strong … far less toxic than Fe(CO)5, and it may produce the same iron-containing intermediates. Here, we present the first …

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 …

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 …

Quantum Computing With Ions

August 1, 2008
Author(s)
David J. Wineland, C Monroe
… quantum information processing with the use of trapped ions. It is intended to give a simple introduction to the … quantum control, quantum-state engineering, trapped ions … Quantum Computing With Ions …

Atomic Data for Iron-group Elements of Astrophysical Interest

July 11, 2013
Author(s)
Gillian Nave, Craig J. Sansonetti, J C. Pickering, Matthew Ruffoni, Anne P. Thorne, Florence Liggins
… College London to measure spectra of singly-ionized iron-group elements using Fourier transform and … Atomic Data for Iron-group Elements of Astrophysical Interest …

A stroboscopic approach to trapped-ion quantum information processing with squeezed phonons

October 24, 2019
Author(s)
Wenchao Ge, Brian C. Sawyer, Joseph W. Britton, Kurt Jacobs, Michael Foss-Feig, John Bollinger
… In trapped-ion quantum information processing, interactions between … (qubits) are mediated by collective modes of motion of an ion crystal. While there are many different experimental … for enhancing the interaction strengths in trapped-ion systems via parametric amplification of the ions' motion. …
Displaying 276 - 300 of 4258
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