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Physics

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Displaying 651 - 675 of 2573

Semiclassical Theory of Photon Echoes with Application to Pr:YSO

November 4, 2021
Author(s)
Zachary H. Levine
Coherent states are used to prepare a crystal using the Atomic Frequency Comb protocol for quantum memory. Here, semiclassical theory is developed and compared to experimental photon echoes of a coherent pulse.

Spatially Resolved Potential and Li-Ion Distributions Reveal Performance-Limiting Regions in Solid-State Batteries

October 19, 2021
Author(s)
Elliot Fuller, Evgheni Strelcov, Jamie Weaver, Michael Swift, Joshua Sugar, Andrei Kolmakov, Nikolai Zhitenev, Jabez J. McClelland, Yue Qi, Joseph Dura, Alec Talin
The performance of solid-state electrochemical systems is intimately tied to the potential and lithium distributions across electrolyte–electrode junctions that give rise to interface impedance. Here, we combine two operando methods, Kelvin probe force

Electro-optically derived millimeter-wave sources with phase and amplitude control

October 12, 2021
Author(s)
Bryan Bosworth, Nick Jungwirth, Kassi Smith, Jerome Cheron, Franklyn Quinlan, Ari Feldman, Dylan Williams, Nate Orloff, Chris Long
Integrated circuits are building blocks in millimeter-wave handsets and base stations, requiring nonlinear characterization to optimize performance and energy efficiency. Today's sources use digital-to-analog converters to synthesize arbitrary electrical

Picosecond Pulse Amplification With an External Passive Optical Cavity

October 12, 2021
Author(s)
E Potma, Christopher J. Evans, X. Xie, R. J. Jones, Jun Ye
We experimentally demonstrate the amplification of picosecond pulses at high repetition rates through coherent addition of successive pulses of a mode-locked pulse train in a high finesse optical cavity equipped with cavity dumping. Amplification greater

Structure and Dynamics of Star Polymer Films from Coarse-Grained Molecular Simulations

October 5, 2021
Author(s)
Jack F. Douglas, Wengang Zhang, Francis W. Starr, Alexandros Chremos
We quantify the structure and dynamics in molecular simulations of star polymer films of varying arm mass Ma and number of star arms f on a supporting solid substrate with an attractive interaction and compare to the corresponding properties of thin films

Three-dimensional dipolar thermalization in a reactive molecular gas with resonant shielding

October 1, 2021
Author(s)
Jun-Ru Li, William Tobias, Kyle Matsuda, Calder Miller, Giacomo Valtolina, Luigi De Marco, Rueben Wang, John Bohn, Goulven Quemener, Jun Ye
We demonstrate suppression of the reactive loss in a gas of ultracold 40K 87Rb molecules in a three-dimensional geometry. The electric field-induced collisional shielding suppresses loss by two orders of magnitude while preserving elastic, long-range

DETERMINATION OF DISTORTION CORRECTIONS FOR A FIXED LENGTH OPTICAL CAVITY PRESSURE STANDARD

September 30, 2021
Author(s)
Jacob Edmond Ricker, Jay H. Hendricks, Kevin O. Douglass, Sarah White, Sergei Syssoev
Optical gas refractometry has enabled new pressure standards to be developed based on a dual Fixed Length Optical Cavity (FLOC) system. NIST in partnership with MKS Instruments has created a portable FLOC pressure standard based gas refractivity. A key

High-Precision Hy-CI and E-Hy-CI studies of Atomic and Molecular Properties

September 29, 2021
Author(s)
James S. Sims, Maria Ruiz, Bholanath Padhy
This review presents a survey of the most important achievements in atomic and molecular calculations obtained with the Hylleraas-configuration interaction method (Hy-CI) and its extension the exponentially correlated Hylleraas-configuration interaction

Collective P-Wave Orbital Dynamics of Ultracold Fermions

September 28, 2021
Author(s)
Mikhail Mamaev, Peiru He, Thomas Bilitewski, Vijin Venu, Joseph Thywissen, Ana Maria Rey
We introduce a protocol to observe p-wave interactions in ultracold fermionic atoms loaded in a 3D optical lattice. Our scheme uses specific motionally excited band states to form an orbital subspace immune to band relaxation. A laser dressing is applied

Continuous radio-frequency electric-field detection through adjacent Rydberg resonance tuning

September 24, 2021
Author(s)
MATTHEW SIMONS, Aly Artusio-Glimpse, chris holloway, Eric Imhof, Steven Jefferts, Robert Wyllie, Brian Sawyer, Thad Walker
We demonstrate the use of multiple atomic-level Rydberg-atom schemes for continuous frequency detection of radio-frequency (RF) fields. Resonant detection of RF fields by electromagnetically induced transparency and Autler-Townes (AT) splitting in Rydberg

Report on the CIPM Key Comparison CCAUV.V-K5

September 17, 2021
Author(s)
Thomas Bruns, Denis Nordmann, Gustavo Ripper, Jacob Holm Winther, Christian Hof, Salustiano Ruiz, Richard Allen, Guillermo S. Pineda, Hideaki Nozato, Chenguang Cai, Laurence Dickinson, Ian Veldman, Anton Kozlyakovskiy, Cui Shan, Andry Ivashchenko
The results of the fifth CIPM key comparison in the area of vibration, here concerning sinusoidal acceleration, are presented. This comparison was intended to build the foundation for subsequent regional key comparisons over the extended frequency range
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