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Search Publications

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Displaying 301 - 325 of 4258

Numerical Simulations of 3D Ion Crystal Dynamics in a Penning Trap using the Fast Multipole Method

April 8, 2025
Author(s)
John Zaris, Wes Johnson, Athreya Shankar, John Bollinger, Scott Parker
… We simulate the dynamics, including laser cooling, of 3D ion crystals confined in a Penning trap using a newly … between ions, which allows us to efficiently study large ion crystals with thousands of ions. In particular, we show that the simulation time scales directly with ion number, rather than with the square of the ion number. By …

Quantum simulation of the hexagonal Kitaev model with trapped ions

November 25, 2011
Author(s)
Dietrich G. Leibfried, Roman Schmied , Janus H. Wesenberg
… to the dipole-dipole interaction between the trapped ions, and are mediated by motion driven by state-dependent … an optimized surface-electrode geometry for trapping ions in the desired honeycomb lattice of Kitaev's model, … simulation of the hexagonal Kitaev model with trapped ions …

Effectiveness of AlN Encapsulate in Annealing Ion-Implanted SiC

July 1, 1999
Author(s)
E Handy, M V. Rao, K A. Jones, M A. Derenge, P Chi, R D. Vispute, T Venkatesan, N A. Papanicolaou, J Mittereder
… arsenic (As), antimony (Sb), aluminum (Al), and boron (B) ion-implanted 6H-SiC. Atomic force microscopy (AFM) has … for annealing cycles up to 1600 C for 15 min. Secondary ion mass spectrometry measurements indicated that the AlN … AFM, AlN encapsulate, diffusion, ion implantation, silicon carbide, SIMS …

Demonstration of a dressed-state phase gate for trapped ions

June 28, 2013
Author(s)
Ting Rei Tan, John P. Gaebler, Ryan S. Bowler, Yiheng Lin, John D. Jost, Dietrich G. Leibfried, David J. Wineland
… compared to some other entangling gates with trapped ions. We achieve a Bell state fidelity of 0.974(4) and … dynamical decoupling, trapped ions, quantum information processing, quantum entangling gate … Demonstration of a dressed-state phase gate for trapped ions …

Interphase Formation Versus Fluoride-ion Insertion in Tunnel-Structured Transition Metal Antimonites

November 6, 2024
Author(s)
Cherno Jaye, Conan Weiland, Daniel Fischer, Alice R. Giem, Jaime R. Ayala, Sarbajit Banerjee
… are used to model interfacial reactions in fluoride-ion batteries. Topochemical F-ion insertion is evidenced for one-dimensional (1D) … F-ion batteries, energy, 1D tunnels, XRD, SEM, XANES, HAXPES … Interphase Formation Versus Fluoride-ion Insertion in Tunnel-Structured Transition Metal …

Systematic uncertainty due to background-gas collisions in trapped-ion optical clocks

September 30, 2019
Author(s)
Aaron M. Hankin, Ethan Clements, Huang Yao, Samuel M. Brewer, Jwo-Sy Chen, Chin-wen Chou, David Hume, David Leibrandt
… calculating the frequency shift and uncertainty of trapped-ion optical atomic clocks caused by background-gas … rate of collisions that cause reordering of mixed-species ion pairs. … uncertainty due to background-gas collisions in trapped-ion optical clocks …

100-Fold Reduction of Electric-Field Noise in an Ion Trap Cleanded with In Situ Argon-Ion-Beam Bombardment

September 7, 2012
Author(s)
Dustin Hite, Yves Colombe, Andrew C. Wilson, Kenton R. Brown, Ulrich J. Warring, Robert Jordens, John D. Jost, David P. Pappas, Dietrich Leibfried, David J. Wineland, Kyle McKay
… an in situ Ar + - beam cleaning procedure, and measuring ion heating rates before and after cleaning the trap … 100-Fold Reduction of Electric-Field Noise in an Ion Trap Cleanded with In Situ Argon-Ion-Beam Bombardment …

Copper-Catalyzed Radiolytic Reduction of CO 2 to CO in Aqueous Solutions

May 1, 2001
Author(s)
J Grodkowski, Pedatsur Neta
… Radiolysis of aqueous solutions containing CO 2 and Cu(II) ions under reducing conditions leads first to reduction of the Cu(II) and then to formation of CO. Experiments under various conditions show that although Cu(II) was often reduced to colloidal Cu(0) particles, formation …

Steady-state spin synchronization through the collective motion of trapped ions

March 22, 2017
Author(s)
Athreya Shankar, John Cooper, Justin G. Bohnet, Murray Holland, John Bollinger
… We design a system with a primary and secondary species of ions that share a common set of normal modes of vibration. In … by sympathetic cooling with the secondary species of ions, to mediate spin synchronization in the primary species of ions. Our numerical study shows that spin-spin correlations …

Lessons learned from FeSb2O4 on stereoactive lone pairs as a design principle for anion insertion

October 20, 2021
Author(s)
Wasif Zaheer, George Agbeworvi, Saul Perez-Beltran, Justin Andrews, Yierpan Aierken, Conan Weiland, Cherno Jaye, Young-Sang Yu, David Shapiro, Sirine Fakra, Daniel A. Fischer, Jinghua Guo, David Prendergrast, Sarbajit Banerjee
… Fluoride-ion batteries are an attractive energy storage concept analogous to lithium-ion batteries but feature an inverted paradigm where anions … but is mediated by critical multi-center synergies between iron and antimony centers across the 1D tunnel structure. The …

Chain and Ion Dynamics in Precise Polyethylene Ionomers

October 11, 2019
Author(s)
Christopher L. Soles, Amalie Frischknecht, Benjamin Paren, Robert Middleton, Karen Winey, Jason Koski, Madhu Sudan Tyagi, Jacob Daniel Tarver
… sufficiently fast to observe the early stages of lithium ion motion and ionic aggregate rearrangements. In the … ionomers with isolated ionic aggregates, the Li-ion containing aggregates rearrange by a process of merging … polyelectrolyte, ionomer, ion transport, neutron scattering, energy storage, molecular …

Neutron Scattering Studies of Lithium-Ion Diffusion in Ternary Phosphate Glasses

June 30, 2016
Author(s)
Gavin Hester, Tom Heitmann, Madhu Sudan Tyagi, Munesh Rathore, Anshuman Dalvi, Saibal Mitra
… modification of the structure and to an increase lithium ion (Li + ) conduction. We find that an increase of Li 2 SO 4 … Lithium ion diffusion, neutron scattering … Neutron Scattering Studies of Lithium-Ion Diffusion in Ternary Phosphate Glasses …

Microwave quantum logic gates for trapped ions

August 11, 2011
Author(s)
Dietrich G. Leibfried, Christian Ospelkaus, Ulrich J. Warring, Yves Colombe, Kenton R. Brown, J. M. Amini, David J. Wineland
… processing, simulation and chemistry. For trapped atomic ions, the quantized motional and internal degrees of freedom … coherently manipulate the internal quantum states of the ions on time scales of 20 ns. We also generate entanglement … microwave control, quantum information processing, trapped ions …

yocto-Newton force detection sensitivity using trapped ions

August 22, 2010
Author(s)
Michael J. Biercuk, Joseph W. Britton, Hermann Uys, Aaron Vandevender, John Bollinger
… small external forces. In a host of formats trapped atomic ions have been proposed as ideal candidates for the detection … as small as 174 yN (yocto = 10 -24 ) using a crystal of 60 ions. Force detection sensitivity using this crystal is … yocto-Newton force detection sensitivity using trapped ions …

VECSEL systems for quantum information processing with trapped beryllium ions

March 10, 2023
Author(s)
Shaun C. Burd, Jussi-Pekka Penttinen, Panyu Hou, Hannah Knaack, Sanna Ranta, Mika Maki, Emmi Kantola, Mircea Guina, Daniel Slichter, Dietrich Leibfried, Andrew C. Wilson
… for quantum information processing with trapped beryllium ions. Each system consists of a compact, single-frequency, … mW of 313 nm light that is used to laser cool trapped 9Be+ ions and quantum state preparation and detection. The 313 nm … for quantum information processing with trapped beryllium ions …

Numerical Study of the Inhibition of Premixed and Diffusion Flames by Iron Pentacarbonyl

January 1, 1999
Author(s)
M D. Rumminger, D Reinelt, Valeri I. Babushok, Gregory T. Linteris
… Iron pentacarbonyl (Fe(CO)5) is an extremely efficient flame … mechanism involving catalytic removal of H atoms by iron-containing species is presented. For premixed flames, … overprediction is suggested to be due to condensation of iron-containing compounds since calculated supersaturation …
Displaying 301 - 325 of 4258
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