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Physics

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Displaying 301 - 325 of 2493

Simulation For All: The Atomic, Molecular, and Optical Science Gateway

June 1, 2023
Author(s)
kathryn hamilton, klaus bartschat, nicolas douguet, sudhakar pamidighantam, robert lucchese, Barry I. Schneider
A challenge facing the Atomic, \hboxMolecular}, and Optical Science (AMOS) community is the lack of a coordinated approach to using and sharing the computational tools and data that have grown organically in the theoretical community. The Atomic, Molecular

In Vivo Quantitative MRI T1 and T2 Measurements of the Human Brain at 0.064 T

May 20, 2023
Author(s)
Kalina Jordanova, Michele Martin, Stephen Ogier, Megan Poorman, Katy Keenan
Object : Tissue relaxation of the brain is measured in vivo at 0.064 T. This work contributes to research efforts targeted at measuring quantitative magnetic resonance imaging properties of the human body at lower field strengths, thereby increasing the

Nonlinear Networks for Arbitrary Optical Synthesis

May 19, 2023
Author(s)
Jennifer Black, Zachary Newman, Su-Peng Yu, David Carlson, Scott Papp
Nonlinear wavelength conversion is a powerful control of light, especially when implemented at the nanoscale with integrated photonics. However, strict energy conservation and phase-matching requirements constrain the converted output. To overcome these

Near Zero Field Magnetoresistance Spectroscopy: A New Tool in Semiconductor Reliability Physics

May 15, 2023
Author(s)
Patrick Lenahan, Elias Frantz, Sean King, Mark Anders, Stephen Moxim, James P Ashton, Kenneth Myers, Michael Flatte, Nicholas Harmon
A relatively simple addition to many widely utilized semiconductor device characterization techniques can allow one to identify much of the atomic scale structure of point defects which play important roles in the electronic properties of the devices under

Electron Scattering Cross Sections for the Ground and Excited States of Tin

May 13, 2023
Author(s)
H. Umer, Yuri Ralchenko, I. Bray, D. V. Fursa
A comprehensive set of cross sections for electron scattering from the ground and first four excited states of tin has been calculated using the Relativistic Convergent Close-Coupling method. Elastic scattering, momentum transfer, total scattering, and

The Complex, Unique and Powerful Imaging Instrument for Dynamics (CUPI2D) at the Spallation Neutron Source

May 12, 2023
Author(s)
Adrian Brugger, Alexandru Biris, Jason Harp, Matthew Connolly, George Nelson, Fernando Luis Esteban Florez, Hassina Bilheux, Jiao Lin, Jeffrey Warren, Andrew Kiss, Roland Pellenq, Ann Junghans, Jonathan Morris, Alexander Long, Anton Tremsin, Andrea Strzelec, Mark Anderson, Robert Agasie, Charles FINNEY, Martin Wissink, MIJA HUBLER, Claire White, Brent Heuser, Aaron Craft, Chuting Tan, Kathryn Morris, Sanna Sevanto, Nikolay Kardjilov, Burkhard Schillinger, Matthew Frost, Sven C. Vogel, Maria Cekanova
The Oak Ridge National Laboratory is planning to build the Second Target Station (STS) at the Spallation Neutron Source (SNS). STS will host a suite of novel instruments that complements the First Target Station's beamline capabilities by offering

VHF/UHF detection using high angular momentum Rydberg states

May 12, 2023
Author(s)
Roger Brown
We demonstrate resonant detection of rf electric fields from 240 MHz to 900 MHz (VHF/UHF) using electromagnetically induced transparency with orbital angular momentum, L = 3 → L′ = 4, Rydberg states. These Rydberg states are accessible with three-photon

Impact of Strong Atmospheric Turbulence on Two-Way Optical Time Transfer

May 8, 2023
Author(s)
Laura Sinclair, Emily Caldwell, Jean-Daniel Deschenes, Hugo Bergeron, William C. Swann, Nathan Newbury
Frequency comb based optical time transfer can provide femtosecond-level timing which will support future clock networks. However, for long-distance terrestrial links, non-reciprocal atmospheric turbulence induces a timing penalty. Here, we quantify this

Versatile parametric coupling between two statically decoupled transmon qubits

May 4, 2023
Author(s)
Xiaoyue Jin, Zachary Parrott, SHLOMI KOTLER, Katarina Cicak, Florent Lecocq, John Teufel, Joe Aumentado, Raymond Simmonds
Parametric coupling is a powerful technique for generating tunable interactions between superconducting circuits using only microwave tones. Here, we present a highly flexible parametric coupling scheme demonstrated with two transmon qubits, which can be

Noise-resilient deep tomographic imaging

April 24, 2023
Author(s)
Zhen Guo, Zhiguang Liu, George Barbastathis, Qihang Zhang, Michael Glinsky, Bradley Alpert, Zachary H. Levine
X-ray tomography is a non-destructive imaging technique that reveals the interior of an object from its projections at different angles. Under limited-angle and low-photon sampling, a regularization prior is required to retrieve a high-fidelity

Symplectic geometry and circuit quantization

April 17, 2023
Author(s)
Andrew Osborne, Trevyn Larson, Sarah Jones, Raymond Simmonds, Andras Gyenis, Andrew Lucas
Circuit quantization is an extraordinarily successful theory that describes the behavior of quantum circuits with high precision. The most widely used approach of circuit quantization relies on introducing a classical Lagrangian whose degrees of freedom
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