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Displaying 3026 - 3050 of 3362

Quantum spin dynamics and entanglement generation with hundreds of trapped ions

June 15, 2016
Author(s)
Justin G. Bohnet, Brian C. Sawyer, Joseph W. Britton, Michael L. Wall, A M. Rey, Michael S. Foss-Feig, John J. Bollinger
Quantum simulation of spin models can provide insights into a variety of hard problems, including the competition between entanglement and decoherence in open quantum systems. Trapped ions are an established platform for quantum simulation, but only

Single-cryostat integration of the quantum anomalous Hall and Josephson effects

August 30, 2024
Author(s)
Jason Underwood, Linsey Rodenbach, Ngoc Thanh Mai Tran, Alireza Panna, Zachary Barcikowski, Molly Andersen, Peng Zhang, Lixuan Tai, Randolph Elmquist, Dean Jarrett, David Goldhaber-Gordon, David Newell, Albert Rigosi
By directly integrating a quantum anomalous Hall resistor (QAHR) and a programmable Josephson voltage standard (PJVS) into a single cryostat, we have implemented a quantum electrical reference that provides a realization of the volt, ohm, and ampere in

Trace Water Effects on Crystalline 1-Ethyl-3-methylimidazolium Acetate

May 16, 2023
Author(s)
Ashlee Aiello, John Hoffman, Anthony Kotula, Lucas Flagg, Ruipeng Li, Jeremiah Woodcock
Spontaneous room temperature crystallization of 1-ethyl-3-methylimidazolium acetate ([C2mim][OAc]) was observed upon removal of trace water. To ensure that this observation was not produced by trace water or other contaminants, sample purity was confirmed

Megahertz-rate Ultrafast X-ray Scattering and Holographic Imaging at the European XFEL

August 23, 2022
Author(s)
Thomas J. Silva, Hans Nembach, Mark Keller, Justin Shaw, Nanna Hagstrom, michael schneider, Nico Kerber, Alexander Yaroslavtsev, Erick Parra, Eric Fullerton, Oleg Shpyrko, Christian Gutt, Hermann Durr, Ezio Iacocca, Roopali Kukreja, stefano Bonetti, Emmanuelle Jal
The advent of X-ray free-electron lasers (XFELs) has revolutionized fundamental science, from atomic to condensed matter physics, from chemistry to biology, giving researchers access to X-rays with unprecedented brightness, coherence, and pulse duration

EXPANSE: A time-of-flight EXPanded Angle Neutron Spin Echo spectrometer at the Second Target Station of the Spallation Neutron Source

July 1, 2022
Author(s)
Changwoo Do, Rana Ashkar, Cristina Boone, Wei-Ren Chen, Georg Ehlers, Peter Falus, Antonio Faraone, Jason Gardner, Van Graves, Thomas Huegle, Reika Katsumata, Darian Kent, Jiao Lin, Bill Mchargue, Bradley D. Olsen, Yangyang Wang, Danielle Wilson, Y. Z.
EXPANSE, an EXPanded Angle Neutron Spin Echo instrument, has been proposed and selected as one of the first suite of instruments to be built at the Second Target Station of the Spallation Neutron Source at the Oak Ridge National Laboratory. This instrument

Robust spin relaxometry with fast adaptive Bayesian estimation

June 15, 2022
Author(s)
Michael Caouette-Mansour, Adrian Solyom, Brandon Ruffolo, Robert D. McMichael, Jack Childress (Sankey), Lilian Childress
Spin relaxometry with nitrogen-vacancy (NV) centers in diamond offers a spectrally selective, atomically localized, and calibrated measurement of microwave-frequency magnetic noise, presenting a versatile probe for condensed matter and biological systems

Layered Double Perovskites

July 26, 2021
Author(s)
Hayden Evans, Lingling Mao, Ram Seshadri, Anthony K. Cheetham
Successful strategies for the design of crystalline materials with useful function are frequently based on the systematic tuning of chemical composition within a given structural family. Perovskites with the formula ABX 3, perhaps the best-known example of

Coherence and decoherence in the Harper-Hofstadter model

May 19, 2021
Author(s)
Ian Spielman, Qiyu Liang, Dimi Trypogeorgos, Ana Valdes-Curiel, Junheng Tao, Mingshu Zhao
We quantum simulated the 2D Harper-Hofstadter (HH) lattice model in a highly elongated tube geometry—three sites in circumference—using an atomic Bose-Einstein condensate. In addition to the usual transverse (out-of-plane) magnetic flux, piercing the

Measurements of the Linear Polarization of Satellite Transitions from Li- and Be- like Ar Ions

June 18, 2020
Author(s)
Amy Gall, Dipti Goyal, Sean W. Buechele, Samuel C. Sanders, Roshani Silwal, Csilla Szabo-Foster, N Brickhouse, Yuri Ralchenko, Endre A. Takacs
Non-thermal electron distributions, such as beams of electrons, are found in many laboratory and astrophysical plasma sources and can produce anisotropic and polarized emission. Theories used to model the emission require sublevel specific analysis, which

Targeted enrichment of 28Si thin films for quantum computing

March 9, 2020
Author(s)
Ke Tang, Hyun S. Kim, Aruna N. Ramanayaka, David S. Simons, Joshua M. Pomeroy
We report on the growth of isotopically enriched 28Si epitaxial films with precisely controlled enrichment levels, ranging from natural abundance ratio of 92.2% all the way to 99.99987 % (0.832 × 10-6 mol/mol 29Si). Isotopically enriched 28Si is regarded

Platform development for expression and purification of stable isotope labeled monoclonal antibodies in Escherichia coli

October 1, 2018
Author(s)
Prasad T. Reddy, Robert G. Brinson, James T. Hoopes, Colleen McClung, Na Ke, Lila Kashi, Mehmet Berkmen
Proteins labeled with stable isotopes play an important role in structural and biophysical studies including nuclear magnetic resonance, small angle neutron scattering, neutron reflectometry, quantitative mass spec and more. The most common and cost

Platform development for expression and purification of stable isotope labeled monoclonal antibodies in Escherichia coli

October 1, 2018
Author(s)
Robert Brinson, James T. Hoopes, Colleen McClung, Na Ke, Lila Kashi, Mehmet Berkmen, Zvi Kelman, Prasad T. Reddy
Proteins labeled with stable isotopes play an important role in structural and biophysical studies including nuclear magnetic resonance, small angle neutron scattering, neutron reflectometry, quantitative mass spec and more. The most common and cost

Entropy-Driven Segregation of Polymer-Grafted Nanoparticles under Confinement

February 22, 2017
Author(s)
Ren Zhang, Bongjoon Lee, Christopher Stafford, J. F. Douglas, Andrey V. Dobrynin, Michael R. Bockstaller, Alamgir Karim
Polymer-grafted nanoparticles (PGNPs) have attracted much attention due to the enhanced dispersion in polymeric materials via an interacting brush layer that enables unique functionality and stability. The miscibility and organization of nanoparticles

Visualizing edge states with an atomic Bose gas in the quantum Hall regime

May 19, 2016
Author(s)
Ian B. Spielman, Ben Stuhl, Hsin I Lu, Lauren M. Aycock, Dina Genkina
We engineered a two-dimensional magnetic lattice in an elongated strip geometry, with effective per-plaquette flux $\approx4/3$ times the flux quanta. We imaged the localized edge and bulk states of atomic Bose-Einstein condensates in this strip. Further

Precision and Robustness of 2D-NMR for Structure and Assessment of Filgrastim Biosimilars

February 5, 2016
Author(s)
Houman Ghasriani, Derek Hodgson, Robert G. Brinson, Ian McEwen, Lucinda F. Buhse, Steven Kozlowski, John Marino, Yves Aubin, David Keire
The higher order structure of biotherapeutics is a critical quality attribute (CQA) that can be evaluated by nuclear magnetic resonance (NMR) spectroscopy at atomic resolution. NMR spectral "fingerprinting" can directly establish drug substance structural

The Synthesis and Characterization of 1111 Type Diluted Ferromagnetic Semiconductor (La 1-x Ca x )(Zn 1-x Mn x )AsO

December 17, 2015
Author(s)
Cui Ding, Shengli Guo, Yao Zhao, Huiyuan Man, Licheng Fu, Yilun Gu, Zhouyang Wang, L. Liu, B. A. Frandsen, S. Cheung, Y. J. Uemura, T. Goko, H. Luetkens, E. Morenzoni, Yang Zhao, F.L. Ning
We report the synthesis and characterization of a bulk form diluted magnetic semiconductor, (La 1-xCa x)(Zn 1-yMn y)AsO, with a two dimensional crystal structure isostructural to that of the 1111 type Fe-based high-temperature superconductor LaFeAsO and

Topological Magnon Bands in Kagome Lattice Ferromagnet

September 28, 2015
Author(s)
Robin Michael Daub Chisnell, Joel Helton, D. E. Freedman, D. K. Singh, R. I. Bewley, D. G. Nocera, Y. S. Lee
The success of band theory in describing the motion of quantum particles inside solids is a foundational accomplishment in modern physics. Recent excitement has centered on systems for which the bands are topological. Such materials possess novel
Displaying 3026 - 3050 of 3362
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