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Search Publications

NIST Authors in Bold

Displaying 776 - 800 of 143596

Optical n(p, T_90) measurement suite 3: results at l = 1542 nm

August 3, 2024
Author(s)
Patrick Egan, Yuanchao Yang
Single-isotherm n(p, T90) results are reported for the gases Ar, N2, H2O, and D2O at vacuum wavelength λ = 1542.383(1) nm. The argon and nitrogen isotherms were measured near 303 K; the water isotherms were measured near 373 K. Combined with the two

Metric Conversion Card

August 2, 2024
Author(s)
Elizabeth Benham, Kristen Dill
NIST SP 365, Metric Conversion Card is a laminated wallet size card includes an 8 cm and 80 mm ruler with approximate unit conversion factors between common International System of Units (SI) and U.S. customary measurement units for length, area, mass

Modeling Spiking Neurons without Spikes

August 2, 2024
Author(s)
Jeff Shainline, Bryce Primavera, Ryan O'Loughlin
While spiking neuromorphic hardware holds promise for efficient implementations of artificial intelligence, the impact has been limited due in part to a lack of learning algorithms that achieve performance superior to conventional deep learning. One

Additive Manufacturing of Highly Entangled Polymer Networks

August 1, 2024
Author(s)
Abhishek Dhand, Matthew Davidson, Hannah Zlotnick, Thomas Kolibaba, Jason Killgore, Jason Burdick
Incorporation of polymer chain entanglements within a single network can synergistically improve stiffness and toughness, yet attaining such dense entanglements through vat photopolymerization additive manufacturing (e.g., digital light processing, DLP)

AutoRefl: Active Learning in Neutron Reflectometry for Fast Data Acquisition

August 1, 2024
Author(s)
David Hoogerheide, Frank N. Heinrich
Neutron reflectometry (NR) is a powerful technique for interrogating the structure of thin films at interfaces. Because NR measurements are slow and instrument availability is limited, measurement efficiency is paramount. One approach to improving

Quantum state tracking and control of a single molecular ion in a thermal environment

August 1, 2024
Author(s)
Yu Liu, Julian Schmidt, Zhimin Liu, David Leibrandt, Dietrich Leibfried, Chin-wen Chou
Understanding molecular state evolution is central to many disciplines, including molecular dynamics, precision measurement, and molecule-based quantum technology. Details of this evolution are obscured when observing a statistical ensemble of molecules

AC Metrology Applications of the Josephson Effect

July 31, 2024
Author(s)
Samuel Benz
The performance of programmable voltage signals that exploit the quantum behavior of superconducting Josephson junctions continues to improve and enable new capabilities for applications in metrology, communications, and quantum control. We present the

Clock-line-mediated Sisyphus Cooling

July 31, 2024
Author(s)
Jacob Siegel, Benjamin Hunt, Tanner Grogan, Youssef Hassan, Kyle Beloy, Roger Brown, Andrew Ludlow, Chun-Chia Chen, Kurt Gibble
We demonstrate sub-recoil Sisyphus cooling using the long-lived 3P0 clock state in alkaline-earthlike ytterbium. A 1388 -nm optical standing wave nearly resonant with the 3P0→3D1 transition creates a spatially periodic light shift of the 3P0 clock state

Orthogonal Determination of Competing Surfactant Adsorption onto Single-Wall Carbon Nanotubes During Aqueous Two-Polymer Phase Extraction via Fluorescence Spectroscopy and Analytical Ultracentrifugation

July 31, 2024
Author(s)
Christopher Sims, Jeffrey Fagan
A combination of analytical ultracentrifugation (AUC) and fluorescence spectroscopy are utilized to orthogonally probe compositions of adsorbed surfactant layers on the surface of (7,5) species single-wall carbon nanotubes (SWCNTs) under conditions known

Tilted Stripes Origin in La1.88Sr0.12CuO4 Revealed by Anisotropic Next-Nearest Neighbor Hopping

July 31, 2024
Author(s)
Wei He, JiaJia Wen, Hong-Chen Jiang, Guangyong Xu, Wei Tian, Takanori Taniguchi, Yoichi Ikeda, Masaki Fujita, Young S. Lee
Spin- and charge- stripe order has been extensively studied in the superconducting cuprates, among which underdoped La2−xSrxCuO4 (LSCO) is an archetype with static spin stripes at low temperatures. An intriguing, but not completely understood, phenomenon

Characterizing a Frequency Converter Based on a Superconducting Coplanar Waveguide

July 30, 2024
Author(s)
Grant Giesbrecht, Nathan Flowers-Jacobs, Adam Sirois, Manuel Castellanos Beltran, Michael Vissers, JIANSONG GAO, Paul Dresselhaus, Taylor Barton
We present a technique for implementing a frequency doubler in NbTiN on silicon for operation in a cryogenic environment. The kinetic inductance of a superconducting coplanar waveguide is exploited for efficient frequency conversion, while the fabrication

Characterizing the Broadband RF Permittivity of 3D-Integrated Layers in a Glass Wafer Stack from 100 MHz to 30 GHz

July 30, 2024
Author(s)
Jacob Pawlik, Tomasz Karpisz, Nicholas Derimow, Sarah Evans, Jim Booth, Nate Orloff, Chris Long, Angela Stelson
We present a method for accurately determining the permittivity of dielectric materials in 3D integrated structures at broadband RF frequencies. With applications of microwave and millimeter-wave electronics on the rise, reliable methods for measuring the

Effects of the Human Presence among Robots in the ARIAC 2023 Industria Automation Competition

July 30, 2024
Author(s)
Leandro Buss Becker, Anthony Downs, Craig I. Schlenoff, Justin Albrecht, Zeid Kootbally, Angelo Ferrando, Rafael Cardoso, Michael Fisher
The ''Agile Robotics for Industrial Automation Competition'' (ARIAC) is an international robotic competition carried out in a simulated factory floor. ARIAC's competitors must perform assembly and kitting tasks by means of controlling four AGVs, one floor

Multiferroic Quantum Material Ba2Cu1-xMnxGe2O7(O?x?1) as a Potential Candidate for Frustrated Heisenberg Antiferromagnet

July 30, 2024
Author(s)
Henrik Thoma, Rajesh Dutta, Vladimir Hutanu, Veronica Granata, Rosalba Fittipaldi, Qiang Zhang, Jeffrey Lynn, Petr Cermak, Nazir Khan, Shibabrata Nandi, Manuel Angst
Multiferroic Ba2CuGe2O7 was anticipated as a potential member of the exciting group of materials hosting a skyrmion or vortex lattice because of its profound Dzyaloshinskii–Moriya interaction (DMI) and the absence of single ion anisotropy (SIA). This phase
Displaying 776 - 800 of 143596