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Displaying 151 - 175 of 2537

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 …

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? …

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 …
Displaying 151 - 175 of 2537
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