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Search Publications

NIST Authors in Bold

Displaying 376 - 400 of 4258

Coherent coupling and non-destructive measurement of trapped-ion mechanical oscillators

July 29, 2024
Author(s)
Panyu Hou, Jenny Wu, Stephen Erickson, Daniel Cole, Giorgio Zarantonello, Adam Brandt, Andrew C. Wilson, Daniel Slichter, Dietrich Leibfried
… spectrally separated harmonic motional modes of a trapped-ion crystal. The timing, strength, and phase of the coupling … non-destructive projective measurement of a trapped-ion motional state. Our work enhances the suitability of trapped-ion motion for continuous-variable quantum computing and …

Development of Certified Reference Materials of Ion-Implanted Dopants in Silicon for Calibration of Secondary Ion Mass Spectrometers

January 1, 2007
Author(s)
David S. Simons, Robert G. Downing, George P. Lamaze, Richard M. Lindstrom, Robert R. Greenberg, Rick L. Paul, Susannah Schiller, William F. Guthrie
… dopant species that is introduced into a silicon wafer by ion implantation. The certified dose (atoms/cm2) of the … of dopant concentration measurements with secondary ion mass spectrometers. Certification measurements were … arsenic, boron, CRM, ion implantation, neutron activation analysis, phosphorus, …

High-accuracy optical clocks based on group 16-like highly charged ions

October 3, 2022
Author(s)
Saleh Allehabi, Samuel Brewer, Vladimir Dzuba, Victor Flambaum, Kyle Beloy
… transitions in group 16-like highly charged ions as candidates for high-accuracy optical clocks, … including S-, Se-, and Te-like systems. For this class of ions, the ground 3PJ fi ne structure manifold exhibits … properties important for optical clock development. All ions discussed are suitable for production in small-scale ion …

Spectroscopy of atomic and molecular ions using quantum logic

June 25, 2006
Author(s)
Piet Schmidt, Till P. Rosenband, Jeroen Koelemeij, David Hume, Wayne M. Itano, James C. Bergquist, David J. Wineland
… developed techniques for quantum computation using trapped ions allow unprecedented coherent control of the internal and … to perform precision spectroscopy of atomic and molecular ions that have no accessible transition for laser cooling and … quantum superpositions, quantum-state engineering, trapped ions. …

An Intense Slit Discharge Source of Jet-Cooled Molecular Ions and Radicals (T rot 30K)

July 1, 1996
Author(s)
D T. Anderson, S Davis, Timothy Zwier, David Nesbitt
… densities of radicals (> 10 12 /cm 3 ) and molecular ions (> 10 10 /cm 3 ), under long absoption path (80cm), … discharge, infrared, jet-cooled, molecular ions, radicals … An Intense Slit Discharge Source of Jet-Cooled Molecular Ions and Radicals (T rot 30K) …

EUV magnetic-dipole lines from highly-charged high-Z ions with an open $3d$ shell

November 27, 2012
Author(s)
Yuri Ralchenko, John D. Gillaspy, Joseph Reader, Dmitry D. Osin
… and Technology was used to produce highly-charged ions of hafnium, tantalum and gold with an open $3d$ shell. The extreme-ultraviolet (EUV) spectra from these ions were recorded with a flat-field grazing-incidence … $3d^n$ configurations of the Co-like to K-like ions, were identified by comparing energy-dependent …

Accurate Modeling of Benchmark X-ray Spectra from Highly-Charged Ions of Tungsten

October 26, 2006
Author(s)
Y Ralchenko, Joseph N. Tan, John D. Gillaspy, Joshua M. Pomeroy, E Silver
… the benchmark x-ray spectrum of highly-charged tungsten ions in the range between 3 \AA \ and 10 \AA produced in an … spectral lines from Cu-like W$^45+}$ and Ni-like W$^46+}$ ions, led to the re-interpretation of a previously … modeling, high multipoles, highly-charged ions, radiative transitions, tungsten …

Modeling near ground-state cooling of two-dimensional ion crystals in a Penning trap using electromagnetically induced transparency

February 7, 2019
Author(s)
Athreya Shankar, Elena Jordan, Kevin Gilmore, Arghavan Safavi-Naini, John J. Bollinger, Murray Holland
… motional drumhead modes, transverse to the plane of the ion crystal, degrade the quality of quantum simulations. … investigate the efficiency of EIT cooling of planar ion crystals in a Penning trap, accounting for complications … Modeling near ground-state cooling of two-dimensional ion crystals in a Penning trap using electromagnetically …

Striations in YIG Fibers Grown by the Laser-Heated Pedestal Method

October 1, 2000
Author(s)
H. Lim, R. C. Demattei, R. S. Feigelson, Kent B. Rochford
… Yttrium iron garnet (YIG) single-crystal fibers of nominal … At growth rates below 10 mm/h, these defects and also the iron-oxide inclusions, which act as IR scattering centers, … crystal growth, magneto-optics , yttrium iron garnet …

Single molecule measurements within individual membrane-bound ion channels using a polymer-based bilayer lipid membrane chip

February 29, 2008
Author(s)
Louis P. Hromada, Brian J. Nablo, Michael Gaitan, John J. Kasianowicz, Don DeVoe
… A polymer microfluidic platform for electrophysiological ion channel measurements is presented. The system includes an … measurements, and multiple microchannels for independent ion channel and analyte delivery. Details of chip … bilayer membrane formation, and alpha-hemolysin ion channel incorporation are discussed. Using this …

Trapped atomic ions and quantum information processing

July 16, 2006
Author(s)
David J. Wineland, Dietrich G. Leibfried, James C. Bergquist, Brad R. Blakestad, John J. Bollinger, Joseph W. Britton, J Chiaverini, Ryan Epstein, David Hume, Wayne M. Itano, John D. Jost, Emanuel H. Knill, Jeroen Koelemeij, C. Langer, R Ozeri, Rainer Reichle, Till P. Rosenband, Tobias Schaetz, Piet Schmidt, Signe Seidelin, Nobuyasu Shiga, Janus Wesenberg
… been demonstrated in separate experiments on trapped ions. Construction of a large-scale information processor … information processing, quantum-state engineering, trapped ions … Trapped atomic ions and quantum information processing …

Energy dissipation of highly charged ions on Al oxide films

March 3, 2010
Author(s)
Joshua M. Pomeroy, Russell Lake, C E. Sosolik
… Slow highly charged ions carry a large amount of potential energy that can be … desorption. Our approach is to extract highly charged ions onto the Al oxide barriers of metal-insulator-metal … highly charged ions, potential energy, tunnel junctions … Energy dissipation of highly charged ions on Al oxide films …

Reduction of Large Hysteresis Losses in the Gd 5 uGe 2 uSi 2 u Magnetic Refrigerant Compound by a Small Alloying Addition of Iron

June 24, 2004
Author(s)
Virgil Provenzano, Alexander J. Shapiro, Robert D. Shull
… of alloying the Gd5Ge2Si2 compound with a small amount of iron. The magnetic entropy change, Sm, of the iron-containing alloy also attains a peak value at a higher … value for Gd5Ge2Si2, and its peak width is greater for the iron-containing material. A refrigeration capacity figure of …

Rotating-radio-frequency ion traps

October 20, 2005
Author(s)
T Hasegawa, John J. Bollinger
… We propose a new ion trap, the rotating-rf trap, in which motion of a charged … in a normal rf trap, an oscillating quadrupole field does. Ion motion in a rotating-rf trap is a superposition of two … ion traps, mass spectroscopy, Mathieu functions, micromotion, … Rotating-radio-frequency ion traps …

National Synchrotron Light Source II: Long Islands state-of-the-art X-ray microscope

May 20, 2014
Author(s)
Bruce D. Ravel, Scott Calvin, Linnea Russell
… of operation, and the National Synchrotron Light Source II, which begins operations later this year. This is a … National Synchrotron Light Source II: Long Islands state-of-the-art X-ray microscope (A pop-up … National Synchrotron Light Source II: Long Islands state-of-the-art X-ray microscope …

Near ground-state cooling of two-dimensional trapped-ion crystals with more than 100 ions

February 7, 2019
Author(s)
Judith Elena Jordan, Kevin A. Gilmore, Athreya Shankar, Arghavan Safari-Naini, Justin G. Bohnet, Murray Holland, John J. Bollinger
… modes of 2-dimensional arrays with up to N 190 Be+ ions stored in a Penning trap. Substantial sub-Doppler … EIT cooling, Penning traps, sub-Doppler cooling, trapped ions … Near ground-state cooling of two-dimensional trapped-ion crystals with more than 100 ions …

High-Stability Single-Ion Clock with 5.5 x 10^-19 Systematic Uncertainty

July 14, 2025
Author(s)
Mason Marshall, Daniel Rodriguez Castillo, Willa Dworschack, Alexander Aeppli, Kyungtae Kim, Dahyeon Lee, William Warfield, Nicholas Nardelli, Tara Fortier, Jun Ye, David Ray Leibrandt, David Hume
… We report a single-ion optical atomic clock with fractional frequency … based on quantum logic spectroscopy of a single 27Al+ ion. A co-trapped 25Mg+ ion provides sympathetic cooling and quantum logic readout of … High-Stability Single-Ion Clock with 5.5 x 10^-19 Systematic Uncertainty …

Penning traps with unitary architecture for storage of highly charged ions

February 15, 2012
Author(s)
Joseph N. Tan, Samuel M. Brewer, Nicholas D. Guise
… beam-line available for extracting highly charged ions. We present a two-magnet architecture with radial access … as well as the collection of light emission by stored ions. Highly charged ions of neon and argon, extracted with initial energies 4000 … with unitary architecture for storage of highly charged ions …

Ion Energy Distributions and Sheath Voltages in Radio-Frequency-Biased, Inductively-Coupled, High-Density Plasma Reactor

April 1, 1999
Author(s)
Mark A. Sobolewski, James K. Olthoff, Yicheng Wang
… Ion energy distributions were measured at a grounded surface … frequency, radial position, inductive source power, and ion mass. The ground sheath voltage which accelerates the … the measurements provide a complete characterization of ion dynamics in the sheath, allowing ion transit time effects …

Trap-Integrated Superconducting Nanowire Single-Photon Detectors with Improved RF Tolerance for Trapped-Ion Qubit State Readout

April 24, 2023
Author(s)
Benedikt Hampel, Daniel Slichter, Dietrich Leibfried, Richard Mirin, Sae Woo Nam, Varun Verma
… State readout of trapped-ion qubits with trap-integrated detectors can address … that are integrated into linear surface-electrode rf ion traps. The shielded SNSPDs can be operated at applied rf … high-fidelity state readout of a wide range of trapped ion species in a typical cryogenic apparatus. …

Argon-Ion Treatment of Multi-Material Layered Surface-Electrode Traps for Noise Mitigation

November 28, 2025
Author(s)
Dustin Hite, Tobias Schaetz, Deviprasath Palani, Florian Hasse, Philip Kiefer, Frederick Bockling, Daniel Stick, Ulrich Warring
… Electric-field noise near ion-trap electrodes limits motional coherence and represents a key obstacle to scaling trapped-ion quantum systems. Here, we investigate how in situ Ar+ … precise control of material interfaces in next-generation ion-trap architectures. …

Trap-integrated superconducting nanowire single-photon detectors for trapped-ion qubit state readout

June 7, 2024
Author(s)
Benedikt Hampel, Daniel Slichter, Dietrich Leibfried, Richard Mirin, Varun Verma
… State readout of trapped-ion qubits is usually achieved by observing qubit-state-dependent fluorescence from the ion while driving an optical cycling transition with laser … of photon detectors for fluorescence detection into the ion trap itself may benefit the development of many-qubit …
Displaying 376 - 400 of 4258
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