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Search Publications

NIST Authors in Bold

Displaying 801 - 825 of 74303

Maximally Edge-Connected Realizations and Kundu's k-factor Theorem

August 3, 2023
Author(s)
James Shook
A simple graph $G$ with edge-connectivity $\lambda(G)$ and minimum degree $\delta(G)$ is maximally edge connected if $\lambda(G)=\delta(G)$. In 1964, given a non-increasing degree sequence $\pi=(d_1},\ldots,d_n})$, Jack Edmonds showed that there is a

Synthetic Aperture RF Reception using Rydberg Atoms

August 2, 2023
Author(s)
Nik Prajapati, Aly Artusio-Glimpse, Matt Simons, Samuel Berweger, Drew Rotunno, Maitreyi Jayaseelan, Kaleb Campbell, Christopher L. Holloway
Rydberg atoms show great promise for use as self-calibrated electric field sensors for a broad range of frequencies. Their response is traceable to the international system of units making them a valuable tool for a variety of applications including

Titanium and titanium oxides at the K- and L-edges: comparing theoretical calculations to X-ray absorption and X-ray emission measurements

August 2, 2023
Author(s)
Karina Bzheumikhova, John Vinson, Ranier Unterumsberger, Malte Wansleben, Claudia Zech, Kai Schuler, Yves Kayser, Philipp Honicke, Burkhard Beckhoff
Using well-calibrated experimental data we demonstrate the applicability of theoretical X-ray absorption spectroscopy (XAS) as well as X-ray emission spectroscopy (XES) calculations for titanium (Ti), titanium oxide (TiO), and titanium dioxide (TiO2) at

A tabletop x-ray tomography instrument for nanometer-scale imaging: demonstration of the 1,000-element transition-edge sensor subarray

August 1, 2023
Author(s)
Paul Szypryt, Nathan J. Nakamura, Dan Becker, Douglas Bennett, Amber L. Dagel, W.Bertrand (Randy) Doriese, Joseph Fowler, Johnathon Gard, J. Zachariah Harris, Gene C. Hilton, Jozsef Imrek, Edward S. Jimenez, Kurt W. Larson, Zachary H. Levine, John Mates, Daniel McArthur, Luis Miaja Avila, Kelsey Morgan, Galen O'Neil, Nathan Ortiz, Christine G. Pappas, Dan Schmidt, Kyle R. Thompson, Joel Ullom, Leila R. Vale, Michael Vissers, Christopher Walker, Joel Weber, Abigail Wessels, Jason W. Wheeler, Daniel Swetz
We report on the 1,000-element transition-edge sensor (TES) x-ray spectrometer implementation of the TOMographic Circuit Analysis Tool (TOMCAT). TOMCAT combines a high spatial resolution scanning electron microscope (SEM) with a highly efficient and

Accurate measurement of the loss rate of cold atoms due to background gas collisions for the quantum-based cold atom vacuum standard

August 1, 2023
Author(s)
Daniel Barker, James A. Fedchak, Jacek Klos, Julia Scherschligt, Abrar Sheikh, Eite Tiesinga, Stephen Eckel
We present measurements of thermalized collisional rate coefficients for ultra-cold $^7$Li and $^87}$Rb colliding with room-temperature He, Ne, N$_2$, Ar, Kr, and Xe. In our experiments, a combined flowmeter and dynamic expansion system, a vacuum metrology

Critical Software Security Weaknesses

August 1, 2023
Author(s)
Assane Gueye, Carlos Eduardo Cardoso Galhardo, Irena Bojanova
In this work, we append our historical study on the most significant software security weaknesses, re-evaluate our findings, and look closely at the Injection and Memory Corruption/Disclosure weaknesses through the NIST Bugs Framework (BF) lenses. Our goal

Magnetic Field Sensor Based on a OLED/Organic Photodetector Stack

August 1, 2023
Author(s)
Sebastian Engmann, Emily Bittle, David Gundlach
In this study a novel, all organic magnetic field sensor is presented based on an organic light emitting diode (OLED) and organic photodetector (OPD) with a maximum field sensitivity comparable to commercial Hall-sensors. The sensor function is driven by

Shear influence on colloidal cluster growth: a SANS and USANS study

August 1, 2023
Author(s)
Chris Muzny
This study examines the time evolution of silica/water clusters where the formation of a gel network from unitary silica particles is interrupted by a simple Couette shear field. The aim is to enable the general understanding of this simple system by

Crystalline Quantum Circuits

July 31, 2023
Author(s)
Grace Sommers, David Huse, Michael Gullans
Random quantum circuits continue to inspire a wide range of applications in quantum information science, while remaining analytically tractable through probabilistic methods. Motivated by the need for deterministic circuits with similar applications, we

Disorder-Induced Excitation Continuum in a Spin-1/2 Cobaltate on a Triangular Lattice

July 31, 2023
Author(s)
Bin Gao, Tong Chen, Chien-Lung Huang, Yiming Qiu, Guangyong Xu, Jesse Liebman, Lebing Chen, Matthew B. Stone, Erxi Feng, Huibo Cao, Xiaoping Wang, Xianghan Xu, Sang-Wook Cheong, Stephen Winter, Pengcheng Dai
A spin-1/2 triangular-lattice antiferromagnet is a prototypical frustrated quantum magnet, which exhibits remarkable quantum many-body effects that arise from the synergy between geometric spin frustration and quantum fluctuations. It can host quantum

Lightshow: a Python package for writing computational x-ray absorption spectroscopy input files

July 29, 2023
Author(s)
Matthew Carbone, Fanchen Meng, Christian Vorwerk, Benedikt Mauer, Fabian Peschel, Xiaohui Qu, Eli Stavitski, Claudia Draxl, John Vinson, Deyu Lu
Spectroscopy simulations are a critical tool for the interpretation of experiment, the development of new theoretical understanding, and fast screening of new molecules and materials. Systematically setting up input files for different simulation codes and
Displaying 801 - 825 of 74303