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Search Publications

NIST Authors in Bold

Displaying 276 - 300 of 2768

Stylus ion trap for enhanced access and sensing

August 1, 2009
Author(s)
Robert Maiwald, Gerd Leuchs, Dietrich Leibfried, Joseph W. Britton, James C. Bergquist, David J. Wineland
… experimentally characterized a novel radio-frequency (rf) ion trap geometry formed by two concentric cylinders over a … ion trap, laser cooling, optical access, quantum optics, … Stylus ion trap for enhanced access and sensing …

Errors in trapped-ion quantum gates due to spontaneous photon scattering

April 27, 2007
Author(s)
R Ozeri, Wayne M. Itano, Brad R. Blakestad, Joseph W. Britton, J Chiaverini, John D. Jost, C. Langer, Dietrich G. Leibfried, Rainer Reichle, Signe Seidelin, Janus Wesenberg, David J. Wineland
… We analyze the error in trapped-ion, hyperfine qubit, quantum gates due to spontaneous … the gate laser beams. We investigate the error in single-ion-qubit rotations that are based on stimulated Raman transitions and in two-ion-qubit entangling phase-gates that are based on …

In Vivo Characteristics of Premixed Calcium Phosphate Cements When Implanted in Subcutaneous Tissues and Periodontal Bone Defects

August 1, 2010
Author(s)
Akiyoshi Sugawara, Kenji Fujikawa, Satoshi Hirayama, Shozo Takagi, Laurence Chow
… study evaluated characteristics of premixed calcium phosphate cements (Pre-CPCs) when implanted in subcutaneous … Premixed calcium phosphate cement, animal study, periodontal bone defects, … In Vivo Characteristics of Premixed Calcium Phosphate Cements When Implanted in Subcutaneous Tissues and …

Highly mechanosensitive ion channels from graphene-embedded crown ethers

November 26, 2018
Author(s)
Alta Y. Fang, Kenneth Kroenlein, Demian Riccardi, Alexander Smolyanitsky
… and dissolved metal ions to demonstrate graphene-based ion channels highly sensitive to externally applied lattice … simulations of the effects of tensile lattice strain on ion permeation across graphene-embedded crown ether pores. … Our findings suggest the first instance of solid-state ion channels with an exponential permeation sensitivity to …

Gold Nanostructures Created by Highly Charged Ions

June 28, 2007
Author(s)
Joshua M. Pomeroy, Holger Grube, A C. Perrella, John D. Gillaspy
… by scanning tunnelling microscopy (STM). Highly charged ions, e.g.,Bi$^{81+}$, represent an exotic form of … gold, highly charged ions, nano-feature, scanning tunneling microscopy … Gold Nanostructures Created by Highly Charged Ions …

Compatibility of trapped ions and dielectrics at cryogenic temperatures

November 17, 2025
Author(s)
Margaret Bruff, Lindsay Sonderhouse, Kaitlyn David, Daniel Slichter, Dietrich Leibfried, Jules Stuart
… quantum networking, trapped ions, optical cavities, integrated photonics, quantum … Compatibility of trapped ions and dielectrics at cryogenic temperatures …

Microcalorimeter/EBIT Measurements of X-Ray Spectra of Highly Charged Ions

January 1, 2001
Author(s)
I Kink, J M. Laming, E Takacs, James V. Porto, John D. Gillaspy, E Silver, H. Schnopper, Simon R. Bandler, M Barbera, N Brickhouse, S Murray, D Landis, J. Beeman, E. E. Haller
… Spectra of highly charged Ar, Kr, Xe and Fe ions, produced in an Electron Beam Ion Trap (EBIT), have been … Kr and to determine a charge state distribution of Kr ions inside the EBIT. Line intensity ratios of Fe XVII have … EBIT, highly charged ions, microcalorimeter, x-ray spectra …

Optical frequency standards based on mercury and aluminum ions

September 12, 2007
Author(s)
Wayne M. Itano, James C. Bergquist, Anders Brusch, Scott A. Diddams, Tara M. Fortier, Thomas P. Heavner, Leo W. Hollberg, David Hume, Steven R. Jefferts, Luca Lorini, Thomas E. Parker, Till P. Rosenband, Jason Stalnaker
… Optical frequency standards based on mercury and aluminum ions …

Mechanosensitive ion permeation across sub-nanoporous MoS2 monolayers

January 23, 2019
Author(s)
Alta Y. Fang, Kenneth Kroenlein, Alexander Smolyanitsky
… functional theory calculations to investigate aqueous ion transport across subnanoporous monolayer molybdenum … pores that are permeable when unstrained, we demonstrate ion current modulation by a factor of over 20 in the tensile … be a strain-induced reduction of the generally repulsive ion–pore interactions resulting from the ions' short-range …

Aqueous Ion trapping and transport in graphene-embedded 18-crown-6 ether pores

June 25, 2018
Author(s)
Alexander Smolyanitsky, Eugene Paulechka, Kenneth Kroenlein
… in permeation between ionic species arise. The trapped ion occupancy and permeation behaviors are shown to be highly … the possibility of performing conceptually straightforward ion-based logical operations resulting from controllable … graphene are possible, suggesting utility in cascaded ion-based logic circuitry. Our results indicate that in …

Stretch-inactivated ion transport through subnanoporous two-dimensional membranes

October 3, 2024
Author(s)
Yechan Noh, Alex Smolyanitsky
… In biology, mechanosensitive ion channels facilitate the conversion of mechanical stimuli, … membranes. Here we describe an opposite behavior, in which ion transport is inactivated upon stretching a subnanoporous 2D membrane. We explore electrophoretic ion transport through several subnanoporous membranes using …

Defect Evolution of Ion-Exposed Single-Wall Carbon Nanotubes

January 3, 2019
Author(s)
Jana Kalbacova, Elias J. Garratt, Raul D. Rodriguez, Angela R. Hight Walker, Kevin A. Twedt, Jeffrey Fagan, Teresa I. Madeira, Jabez J. McClelland, Babak Nikoobakht, Dietrich R. Zahn
… defects in single-wall carbon nanotubes by a focused ion beam of light and heavy ions, Li+ and Ga+, respectively. … Precise control of defects was achieved by tuning the ion fluence over five orders of magnitude from 3∙1010 … This is further explored in a model that accounts for the ion type and its energy and thus can be employed to estimate …

Characterization of a high-brightness, laser-cooled Li+ ion source

February 20, 2019
Author(s)
Jamie R. Gardner, William R. McGehee, Jabez J. McClelland
… Ion sources based on laser cooling have recently provided new pathways to high-resolution microscopy, ion milling, and ion implantation. Here, we present the design and detailed … Atomic physics, Laser cooling, Focused ion beams, Scanning probe microscopy, Battery materials …

Quantum gate teleportation between separated zones of a trapped-ion processor

May 31, 2019
Author(s)
Yong Wan, Daniel Kienzler, Stephen D. Erickson, Karl H. Mayer, Ting R. Tan, Jenny J. Wu, Hilma H. Macedo De Vasconcelos, Scott C. Glancy, Emanuel H. Knill, David J. Wineland, Andrew C. Wilson, Dietrich G. Leibfried
… qubits in spatially separated zones of a segmented ion trap. Our teleported CNOT's entanglement fidelity was in … at the 95% confidence level. The implementation combines ion shuttling with individually addressed single qubit … thereby demonstrating essential tools for scaling trapped-ion quantum computers combined in a single device. …

The Detection and Characterization of Ions, DNA and Proteins with Nanometer-Scale Pores

December 1, 2007
Author(s)
John J. Kasianowicz, Jeffrey C. Lerman, Sarah E. Henrickson, Martin Misakian, Rekha Panchal, Kelly Halverson, Sina Bavari, Tam Nguyen, Rick Gussio, Devanand K. Shenoy, Vincent M. Stanford
… for use in the sensitive and selective detection of ions, the characterization of polynucleotides, and toxins as … The Detection and Characterization of Ions, DNA and Proteins with Nanometer-Scale Pores …

High-fidelity laser-free universal control of trapped ion qubits

September 8, 2021
Author(s)
Raghavendra Srinivas, Emanuel Knill, Robert Sutherland, Alexander T. Kwiatkowski, Hannah M. Knaack, Scott Glancy, David J. Wineland, Shaun C. Burd, Dietrich Leibfried, Andrew C. Wilson, David T. Allcock, Daniel Slichter
… rotations so far. Universal control of trapped ion qubits has been separately demonstrated using tightly … high-fidelity laser-free universal control of two trapped-ion qubits by creating both symmetric and antisymmetric … of decoherence and usable with essentially any trapped ion species. The scheme has the potential to perform …

Background and blended spectral line reduction in precision spectroscopy of EUV and x-ray transitions in highly charged ions

March 3, 2023
Author(s)
Yuri Ralchenko, Joseph N. Tan, Aung S. Naing, Galen O'Neil, Paul Szypryt, Dipti Dipti, Grant Mondeel, Roshani Silwal, Alain Lapierre, Steven Blundell, Gerald Gwinner, Antonio Camargo Villari, Endre Takacs
… similar ion charge distributions of heavy highly charged ions 2 that create similar potentials for lighter … between impurity elements with and without heavy 6 ions present. … spectroscopy, highly-charged ions, EBIT, line blen … of EUV and x-ray transitions in highly charged ions …

Capture and isolation of highly-charged ions in a compact Penning trap: V12

December 4, 2013
Author(s)
Samuel Brewer, Nicholas D. Guise, Joseph Tan
… to be useful for capture and storage of highly-charged ions extracted from an EBIT ion source at the National … and Technology (NIST). Highly-charged argon and neon ions extracted with energies of up to 4000 eV/Q are captured … slowing, capture, and storage of energetic, highly-charged ions in a unitary Penning trap. Near optimal capture …

Quantum information processing and metrology with trapped ions

January 25, 2011
Author(s)
David J. Wineland, Dietrich G. Leibfried
… The use of trapped atomic ions in the field of quantum information processing is … simple algorithms. We discuss the potential of trapped ions to reach fault-tolerant error levels in a large-scale … information processing, quantum state control, trapped ions … Quantum information processing and metrology with trapped ions …

Sympathetic Electromagnetically-Induced-Transparency Laser Cooling of Motional Modes in an Ion Chain

April 12, 2013
Author(s)
Yiheng Lin, John P. Gaebler, Ting Rei Tan, Ryan S. Bowler, John D. Jost, Dietrich G. Leibfried, David J. Wineland
… (EIT) laser cooling to cool motional modes of a linear ion chain. As a demonstration, we apply EIT cooling on 24 Mg + ions to cool the axial modes of a 9 Be + - 24 Mg + ion pair and a 9 Be + - 24 Mg + - 24 Mg + - 9 Be + ion chain thereby sympathetically cooling the 9 Be + ions. …

Toward scalable ion traps for quantum information processing

March 16, 2010
Author(s)
Jason Amini, Hermann Uys, Janus H. Wesenberg, Signe Seidelin, Joseph W. Britton, John J. Bollinger, Dietrich G. Leibfried, Christian Ospelkaus, Aaron Vandevender, David J. Wineland
… computing, ion, microfabricated, quantum, trap, scalability … Toward scalable ion traps for quantum information processing …

Coherent Diabatic Ion Transport and Separation in a Multizone Trap Array

August 24, 2012
Author(s)
Ryan S. Bowler, John P. Gaebler, Yiheng Lin, Ting Rei Tan, David Hanneke, John D. Jost, J. Home, Dietrich G. Leibfried, David J. Wineland
… We investigate ion motion dynamics during the transport between and … We laser-cool a single $\ensuremath{^{9}{\rm {Be}^{+}}}$ ion held in a linear Paul trap to near its ground state of … m$ in 16 periods of oscillation. During transport the ion is excited to a displaced coherent state with …
Displaying 276 - 300 of 2768
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