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Displaying 26 - 50 of 2414

Fast Ground State to Ground State Separation of Small Ion Crystals

October 10, 2024
Author(s)
Tyler Gugliemo, Dietrich Leibfried, Stephen Libby, Daniel Slichter
Rapid separation of linear crystals of trapped ions into different subsets is critical for realizing trapped ion quantum computing architectures where ions are rearranged in trap arrays to achieve all-to-all connectivity between qubits. We introduce a

Developing Interoperable, Accessible Software via the Atomic, Molecular, and Optical Sciences Gateway: A Case Study of the B-spline atomic R-Matrix code Graphical User Interface

October 3, 2024
Author(s)
Barry I. Schneider, kathryn hamilton, Sudhakar Pamidighantam, Tom Wolcott
The Atomic, Molecular, and Optical Science Gateway\citeamosgateway} is a comprehensive cyber\-infrastructure for research and educational activities in computational AMO science. The \hbox$B$-Spline} atomic \hbox$R$-Matrix} (BSR) suite of programs is

A network of cooler white dwarfs as infrared standards for flux calibration

October 1, 2024
Author(s)
Abbigail Elms, Nicola Gentile Fusillo, Pier-Emmanuel Tremblay, ralph bohlin, Mark Hollands, Snehalata Sahu, Mairi O'Brien, Susana Deustua, Tim Cunningham
The accurate flux calibration of observational data is vital for astrophysics and cosmology because absolute flux uncertainties of stellar standards propagate into scientific results. With the ever higher precision achieved by telescopic missions (e.g. JWS

Phase transition in magic with random quantum circuits

September 23, 2024
Author(s)
Michael Gullans
Maic is a resource that enables quantum computation and quantifies the efficacy of a quantum state for universal fault-tolerant quantum computing. Understanding the mechanisms by which magic is created or destroyed is, therefore, a crucial step towards

Dynamically generated concatenated codes and their phase diagrams

September 20, 2024
Author(s)
Michael Gullans, David Huse, Grace Sommers
We formulate code concatenation as the action of a unitary quantum circuit on an expanding tree geometry and find that for certain classes of gates, applied identically at each node, a binary tree circuit encodes a single logical qubit with code distance

Linking excess entropy and acentric factor in spherical fluids

September 9, 2024
Author(s)
Tae Jun Yoon, Ian Bell
Introduced by Kenneth Pitzer in 1955, the acentric factor (ω) became a standard quantity in chemical thermodynamics, representing a molecule's "shape" effect on the deviation from the corresponding state behavior. Nevertheless, its interpretation remains

Calibration of Autler-Townes based electrometry in Rydberg states of alkali atoms

August 30, 2024
Author(s)
Noah Schlossberger, Nikunjkumar Prajapati, Alexandra Artusio-Glimpse, Samuel Berweger, Matthew Simons, William Watterson, Dangka Shylla, Christopher Holloway
Highly excited states of alkali atoms are a powerful tool for making SI-traceable electric field measurements without the need for an external reference. However, the calibration of these measurements suffers from ambiguity in which transition dipole

Assessing girth weld quality of pipeline steels and their susceptibility to hydrogen embrittlement

August 28, 2024
Author(s)
Zack Buck, Newell Moser, Nicholas Derimow, May Ling Martin, Damian Lauria, Enrico Lucon, Douglas Stalheim, Peter Bradley, Matthew Connolly
Hydrogen has long been considered a viable carbon-free option for ever-increasing societal desires to transform our energy infrastructure towards more renewable and alternative technologies. However, the effects of hydrogen-assisted damage mechanisms that

Wafer-scale fabrication of evacuated alkali vapor cells

August 28, 2024
Author(s)
Yang Li, Matthew Hummon, Susan Schima, John Kitching, DONGGYU SOHN
We describe a process for fabricating a wafer-scale array of alkali metal vapor cells with low residual gas pressure. We show that by etching long, thin channels between the cells on the Si wafer surface, the residual gas pressure in the evacuated vapor

Calibration for Astrophysics using an Artificial star with NIST-traceable Distribution of Luminous Energy (CANDLE) Instrument Development

August 23, 2024
Author(s)
Joseph P. Rice, Brian Alberding, Susana Deustua, Thinh Bui, Eric Shirley, Keshet Shavit, Eliad Peretz, Daniel Kuesters, Greg Aldering, Dmitry Vorobiev, Jonathan Papa, Justin Albert, Ralph Bohlin, Benjamin Rose, Piotr Pachowicz, Peter Plavchan, Angella Tanner, John Mather, Jean Thomas Landry, Etienne Gauvin, Thomas Michaud=Bayens, Greg Kopp
The CANDLE Engineering Demonstration Unit (EDU) was selected by the 2022 APRA program to develop and demonstrate that we can reach the flux accuracy and range required for an artificial star. A critical issue in producing accurate and reliable flux

Quantum Sensing with Erasure Qubits

August 19, 2024
Author(s)
Pradeep Niroula, Jack Dolde, Xin Zheng, Jacob Bringewatt, Adam Ehrenberg, Kevin Cox, Jeff Thompson, Michael Gullans, Shimon Kolkowitz, Alexey Gorshkov

Bilayer crystals of trapped ions for quantum information processing

August 16, 2024
Author(s)
Samarth Hawalder, Prakriti Shahi, Allison Carter, Ana Rey Ayala, John J. Bollinger, Athreya Shankar
Trapped ion systems are a leading platform for quantum information processing, but they are currently limited to 1D and 2D arrays, which imposes restrictions on both their scalability and their range of applications. Here, we propose a path to overcome

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

Uncovering the Timescales of Spin Reorientation in TbMn6Sn6

July 26, 2024
Author(s)
Sinead Ryan, Anya Grafov, Na Li, Hans Nembach, Justin Shaw, Hari Bhandari, Tika Kafle, Richa Sapkota, Henry Kapteyn, Nirmal Ghimire, Margaret Murnane
TbMn6Sn¬6 is a ferrimagnetic material which exhibits a highly unusual phase transition near room temperature where spins remain collinear while the total magnetic moment rotates from out-of-plane to in-plane. The mechanisms underlying this phenomenon have

NIST Time and Frequency Bulletin

July 23, 2024
Author(s)
Kelsey Rodriguez
The Time and Frequency Bulletin provides information on performance of time scales and a variety of broadcasts (and related information) to users of the NIST services.

Effects of hydrogen on the evolution of 4130 steel microstructure as a result of tensile loading

July 12, 2024
Author(s)
Zack Buck, May Ling Martin, Damian Lauria, Jason Killgore, Peter Bradley, Yan Chen, Ke An, Matthew Connolly
Neutron diffraction and Scanning Kelvin Probe Force Microscopy (SKPFM) were used to study the evolution of lattice strain, dislocation density, and phase partitioning of a ferrite/martensite pressure vessel steel (AISI 4130) that resulted from tensile

Opportunities for Fundamental Physics Research with Radioactive Molecules

July 12, 2024
Author(s)
Michail Athanasakis-Kaklamanakis, Mia Au, Jochen Ballof, Robert Berger, Anastasia Borschevsky, Alexander Breier, Dmitry Budker, Luke Caldwell, Christopher Charles, Vincenzo Cirigliano, Jordy de Vries, David DeMille, Jacek Jacek Dobaczewski, Ch. E. Dullmann, Ephraim Eliav, Ephraim Eliav, Jonathan Engel, Mingyu Fan, Victor Flambaum, Alyssa Gaiser, Ronald Garcia Ruiz, Konstantin Gaul, Thomas Geisen, Alexander Gottberg, Gerald Gwinner, Reinhard Heinke, Steven Hoekstra, Jason Holt, Nicholas Hutzler, Andrew Jayich, Stephan Malbrunot-Ettenauer, Takayuki Miyagi, Iain Moore, Petr Navratil, Witold Nazarewicz, Gerda Neyens, Eric Norrgard, Nicholas Nusgart, Lukas Pasteka, Roy Ready, Moritz Pascal Reiter, Mikael Reponen, Sebastian Rothe, Marianna Safronova, Andrea Shindler, Jaideep Singh, Leonid Skripnikov, Silviu-Marian Udrescu, Shane Wilkins
Radioactive molecules hold great promise for their discovery potential in diverse fields. The extreme nuclear properties of heavy, short-lived nuclei and the intrinsic sensitivity, flexibility, and quantum control opportunities available to molecules make

Few-electron highly charged muonic Ar atoms verified by electronic K xrays

July 10, 2024
Author(s)
Takuma Okumura, Toshiyuki Azuma, Douglas Bennett, W. Bertrand (Randy) Doriese, Malcolm Durkin, Joseph Fowler, Johnathon Gard, Tadashi Hashimoto, Ryota Hayakawa, Yuto Ichinohe, Paul Indelicato, Tadaaki Isobe, Sohtaro Kanda, Daiji Kato, Miho Katsuragawa, Naritoshi Kawamura, Yasushi Kino, Nao Kominato, Yasuhiro Miyake, Kelsey Morgan, Hirofumi Noda, Galen O'Neil, Shinji Okada, Kenichi Okutsu, Nancy Paul, Carl D. Reintsema, Toshiki Sato, Dan Schmidt, Kouichiro Shimomura, Patrick Strasser, Daniel Swetz, Tadayuki Takahashi, Shinichiro Takeda, Soshi Takeshita, Motonobu Tampo, Hideyuki Tatsuno, Tong Xiao-Min, Joel Ullom, Shin Watanabe, Shinya Yamada, Takuma Yamashita
Electronic K x rays emitted by muonic Ar atoms in the gas phase were observed using a superconducting transition-edge-sensor microcalorimeter. The high-precision energy spectra provided a clear signature of the presence of muonic atoms accompanied by a few
Displaying 26 - 50 of 2414