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Displaying 251 - 275 of 4633

Resource-efficient dissipative entanglement of two trapped-ion qubits

August 6, 2021
Author(s)
Daniel Cole, Stephen Erickson, Giorgio Zarantonello, Panyu Hou, Jenny Wu, Karl Horn, Daniel Slichter, Florentin Reiter, Christiane Koch, Dietrich Leibfried
… simplified method for generating an entangled state of two trapped-ion qubits. Our implementation produces its target state … Resource-efficient dissipative entanglement of two trapped-ion qubits …

Magneto-Optical Trapping of Chromium Atoms

May 1, 2000
Author(s)
C Bradley, Jabez J. McClelland, W Anderson, Robert Celotta
… a magneto-optical trap for chromium atoms. Using trapping light at 425 nm and two repumping lasers tuned to … collisions between trapped atoms. Over a range of trapping conditions, the density-dependent trap loss rate … atom trapping, chromium, cold collisions, laser cooling, …

Scalable Quantum Logic Spectroscopy

November 2, 2022
Author(s)
Kaifeng Cui, Jose Valencia, Kevin Boyce, Ethan Clements, David Leibrandt, David Hume
… In quantum logic spectroscopy (QLS), one species of trapped ion is used as a sensor to detect the state of an otherwise inaccessible ion species. This extends precision measurements to a broader … to address the problem of scaling QLS to larger ion numbers. We demonstrate the basic features of this method …

Block shear failure of steel gusset plates

July 1, 2010
Author(s)
Chiara Crosti, Dat Duthinh
… for the load rating of bolted and riveted gusset plates in truss bridges (FHWA, 2009). This paper develops … models capable of predicting the behavior of gusset plates in ten-sion, resulting in possible failure by block … for the block shear strength of riveted and bolted gusset plates. For a variety of geometries, the Load and Resistance …

Continuum-based free vibration of circular trigonal and isotropic plates

May 28, 2013
Author(s)
Ward L. Johnson, Paul R. Heyliger
… behavior of completely unrestrained elastic circular plates with trig- onal and isotropic material symmetry is … material, Ritz method, trigonal crystals, trigonal plates, vibrational modes … free vibration of circular trigonal and isotropic plates …

Structure stability and electronic transport of gold nanowires on BeO (0001) surface

July 12, 2013
Author(s)
Shmuel Barzilai, Francesca M. Tavazza, Lyle E. Levine
… Gold nanowire chains are considered a good candidate for … surface is compatible with the Au-Au atom spacing, and the gold atoms are attracted to this surface. However, the … cases showed small changes in the electron structure of gold NWs due to the presence of the BeO substrate. These …

Dendrimer Templates for the Formation of Gold Nanoclusters

August 1, 2000
Author(s)
Franziska Grohn, Barry J. Bauer, Y A. Akpalu, C L. Jackson, Eric J. Amis
… hybrid colloids in aqueous solution. The formation of gold colloids upon reduction of a gold salt precursor serves as a model reaction to study the … and small angle x-ray scattering (SAXS) show that the gold particles are formed inside the dendrimer and located …

Highly charged ion (HCI) modified tunnel junctions

August 15, 2008
Author(s)
Joshua M. Pomeroy, Holger Grube
… have characterized some basic principles of this unique ion-surface interaction, but recent activity reported here is … tunnel junction, highly charged ions, electron beam ion trap (EBIT) … Highly charged ion (HCI) modified tunnel junctions …

Characterization of gold nanoparticles modified with single-stranded DNA using analytical ultracentrifugation and dynamic light scattering

August 3, 2010
Author(s)
James Falabella, Tae Joon Cho, Dean C. Ripple, Vincent A. Hackley, Michael J. Tarlov
… We report the characterization of gold nanoparticles modified with thiol-terminated single … coefficients of nominally 10 and 20 nm diameter gold nanoparticles modified with thiol-terminated thymidine … ultracentrifugation. The sedimentation coefficients of the gold nanoparticles were found to decrease with increasing …

High separation efficiency of gold nanomaterials of different aspect ratio and size using capillary transient isotachophoresis

August 2, 2019
Author(s)
Kathryn R. Riley, Hind El Hadri, Jiaojie Tan, Vincent A. Hackley, William A. MacCrehan
… technique for the improved detection and separation of gold nanomaterials. Overall, an approximate 2-fold decrease in peak width was observed for citrate-stabilized gold nanoparticles/rods and CTAB- coated gold nanorods relative to traditional capillary zone …

Instrumented Charpy Tests at 77 K on 316L Stainless Steel Welded Plates

December 20, 2021
Author(s)
Enrico Lucon, Jake Benzing
… from the center of four 316L welded stainless steel plates, each produced by a different vendor. Although the plates were produced in accordance with the same … instrumented Charpy tests, liquid nitrogen, welded plates … Charpy Tests at 77 K on 316L Stainless Steel Welded Plates …

Negative-Bias Temperature Instability Induced Electron Trapping

July 21, 2008
Author(s)
Jason P. Campbell, Kin P. Cheung, John S. Suehle, A Oates
… NBTI debate focuses on the dominance of either a hole trapping/de-trapping mechanism or hydrogen depassivation mechanism. In … the presence of a third mechanism involving electron trapping/de-trapping. The presence of this electron … negative-bias temperature instability, electron trapping, hole trapping …

Preparation of entangled states through Hilbert space engineering

September 28, 2016
Author(s)
Yiheng Lin, John P. Gaebler, Florentin Reiter, Ting R. Tan, Ryan S. Bowler, Yong Wan, Adam C. Keith, Emanuel Knill, Kevin Coakley, Dietrich Leibfried, David J. Wineland, Scott Glancy
… such as fluctuations in laser intensity and frequency, and ion-motion frequencies. …

Quantitative evaluation of digital image correlation as applied to large-scale gusset plate experiments

June 21, 2012
Author(s)
Mark A. Iadicola, Robert S. Zobel, Justin M. Ocel
… the Load and Resistance Factor Design and Rating of Gusset-Plate Connections for Steel Bridges" the Federal High-way … Administration (FHWA) is performing large-scale gusset-plate experiments. The National Institute of Standards and … work focuses on a portion of the DIC measurements for one plate configuration, and presents a preliminary comparison of …

Validation of Scanning Probe Moire Technique With the CTE of Gold

June 1, 2001
Author(s)
Elizabeth S. Drexler, T A. Winningham
… to measure the coefficient of thermal expansion (CTE) of gold. Moire fringes were generated by the interference of the specimen grating instrumented onto the polished gold surface and the rastering of the cantilever tip of the … SPM in contact mode set to detect height. Tests in which gold was thermally loaded were conducted on two types of …

Quantum information processing and quantum control with trapped atomic ions

December 14, 2009
Author(s)
David J. Wineland
… The role of trapped atomic ions in the field of quantum information processing is … discuss some of the historical developments that enabled ions to enter the field and then summarize the basic … Quantum information processing and quantum control with trapped atomic ions …

Effect of wire configuration and point defects on the conductance of gold nano-conductors

February 28, 2014
Author(s)
Shmuel Barzilai, Francesca M. Tavazza, Lyle E. Levine
… Gold nanowire (NW) chains are considered a good candidate for … was found to spontaneously form during simulations of gold NWs elongations. It is stable and a good conductor when … Conductance, gold nanowire, ab initio calculations … wire configuration and point defects on the conductance of gold nano-conductors …

Kinetic-energy Distributions of Positive and Negative Ions in Townsend Discharges in Oxygen

April 1, 1999
Author(s)
MVVS. Rao, Richard J. Van Brunt, James K. Olthoff
… flux-energy distributions of positive and negative ions have been measured at high electric field-to-gas density … dominant ion-molecule collision process. The less abundant ions, O + , O 2 - , and O - , exhibit non-Mawellian ion … Kinetic-energy Distributions of Positive and Negative Ions in Townsend Discharges in Oxygen …

Trapping and Cooling of Potassium Isotopes in a Double-Magneto-Optical-Trap Apparatus

January 1, 1999
Author(s)
M Prevedelli, F S. Cataliotti, Eric A. Cornell, J R. Ensher, C Fort, L Ricci, G M. Tino, M Inguscio
… on teh efficient operation of a double-magneto-optical-trap (MOT) apparatus for potassium isopes. Mechanisms for the … between the two MOTs are studied. A magnetic quadrupole trap has been loaded from the second MOT: density and … magneto-optical trap, potassium …

Electrochemical Study of Chitosan Films Deposited on Gold Electrodes

July 28, 2006
Author(s)
Rebecca A. Zangmeister, J J. Park, G W. Rubloff, Michael J. Tarlov
… characterization of chitosan films deposited on gold electrodes. Cyclic voltammetry was used to characterize … the deposition and electroactivity of chitosan coated gold electrodes. Chitosan films were found to deposit at a gold electrode due to a local increase in pH at potentials …
Displaying 251 - 275 of 4633
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