Charles W. Clark
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Generation of Neutron Airy Beams Open
The Airy wave packet is a solution to the potential-free Schrödinger equation that exhibits remarkable properties such as self-acceleration, nondiffraction, and self-healing. Although Airy beams are now routinely realized with electromagne…
Small-angle scattering interferometry with neutron orbital angular momentum states Open
Methods to prepare and characterize neutron helical waves carrying orbital angular momentum (OAM) were recently demonstrated at small-angle neutron scattering (SANS) facilities. These methods enable access to the neutron orbital degree of …
Double-target BEC atomtronic rotation sensor Open
We present a proof-of-concept design for an atomtronic rotation sensor consisting of an array of ``double-target'' Bose-Einstein condensates (BECs). A ``target'' BEC is a disk-shaped condensate surrounded by a concentric ring-shaped conden…
Scaling Law of Quantum Confinement in Single-Walled Carbon Nanotubes Open
Quantum confinement significantly influences the excited states of sub-10 nm single-walled carbon nanotubes (SWCNTs), crucial for advancements in transistor technology and the development of novel opto-electronic materials such as fluoresc…
View article: Phase and contrast moiré signatures in two-dimensional cone beam interferometry
Phase and contrast moiré signatures in two-dimensional cone beam interferometry Open
Neutron interferometry has played a distinctive role in fundamental science and characterization of materials. Moiré neutron interferometers are candidate next-generation instruments: they offer microscopy-like magnification of the signal,…
Generation of neutron Airy beams Open
The Airy wave packet is a solution to the potential-free Schrodinger equation that exhibits remarkable properties such as self-acceleration, non-diffraction, and self-healing. Although Airy beams are now routinely realized with electromagn…
View article: Cone beam neutron interferometry: From modeling to applications
Cone beam neutron interferometry: From modeling to applications Open
Phase-grating moiré interferometers (PGMIs) have emerged as promising candidates for the next generation of neutron interferometry, enabling the use of a polychromatic beam and manifesting interference patterns that can be directly imaged …
Small-angle scattering interferometry with neutron orbital angular momentum states Open
Access to the neutron orbital degree of freedom has been enabled by the recent actualization of methods to prepare and characterize neutron helical waves carrying orbital angular momentum (OAM) at small-angle neutron scattering (SANS) faci…
Structured neutron waves and neutron holography Open
The development of advanced spintronics materials necessitates novel characterization tools with the ability to analyze nanometer-scale spin textures. Neutrons, with their angstrom-sized wavelengths, electric neutrality, and controllable s…
View article: Phase and contrast moiré signatures in two-dimensional cone beam interferometry
Phase and contrast moiré signatures in two-dimensional cone beam interferometry Open
Neutron interferometry has played a distinctive role in fundamental science and characterization of materials. Moiré neutron interferometers are candidate next-generation instruments: they offer microscopy-like magnification of the signal,…
View article: Cone beam neutron interferometry: from modeling to applications
Cone beam neutron interferometry: from modeling to applications Open
Phase-grating moire interferometers (PGMIs) have emerged as promising candidates for the next generation of neutron interferometry, enabling the use of a polychromatic beam and manifesting interference patterns that can be directly imaged …
Chiral Separation by Capillary Electrophoresis and Capillary Electrophoresis–Mass Spectrometry Open
Chiral separations by capillary electrophoresis (CE) have been studied and applied for nearly 40 years, in which time the possibilities and scope have advanced drastically. In this chapter, the fundamental aspects, current approaches, and …
View article: Elucidating a dissolution–deposition reaction mechanism by multimodal synchrotron X-ray characterization in aqueous Zn/MnO<sub>2</sub> batteries
Elucidating a dissolution–deposition reaction mechanism by multimodal synchrotron X-ray characterization in aqueous Zn/MnO<sub>2</sub> batteries Open
Aqueous Zn/MnO 2 batteries with their environmental sustainability and competitive cost, are becoming a promising, safe alternative for grid-scale electrochemical energy storage.
View article: Correction: Elucidating a dissolution–deposition reaction mechanism by multimodal synchrotron X-ray characterization in aqueous Zn/MnO<sub>2</sub> batteries
Correction: Elucidating a dissolution–deposition reaction mechanism by multimodal synchrotron X-ray characterization in aqueous Zn/MnO<sub>2</sub> batteries Open
Correction for ‘Elucidating a dissolution–deposition reaction mechanism by multimodal synchrotron X-ray characterization in aqueous Zn/MnO 2 batteries’ by Varun R. Kankanallu et al. , Energy Environ. Sci. , 2023, https://doi.org/10.1039/D2…
Experimental realization of neutron helical waves Open
Methods of preparation and analysis of structured waves of light, electrons, and atoms have been advancing rapidly. Despite the proven power of neutrons for material characterization and studies of fundamental physics, neutron science has …
Experimental Realization of Neutron Helical Waves Open
Methods of preparation and analysis of structured waves of light, electrons, and atoms have been advancing rapidly. Despite the proven power of neutrons for material characterization and studies of fundamental physics, neutron science has …
Modeling Atom Interferometry Experiments with Bose–Einstein Condensates in Power-Law Potentials Open
Recent atom interferometry (AI) experiments involving Bose–Einstein condensates (BECs) have been conducted under extreme conditions of volume and interrogation time. Numerical solution of the rotating-frame Gross–Pitaevskii equation (RFGPE…
Impacts of COVID-19 on U.S. tilapia farms: Quarter 1 Results March 23, 2020 to April 10, 2020 Open
In response to the coronavirus disease (COVID-19), Virginia Tech and the Ohio State University collected information about how aquaculture/aquaponics farms and allied businesses have been affected by the COVID-19 pandemic. A survey was co…
Impacts of COVID-19 on U.S. aquaculture, aquaponics, and allied businesses located in the USDA Tropical and Subtropical Aquaculture Region: Quarter 1 Results March 23, 2020 to April 10, 2020 Open
In response to the coronavirus disease (COVID-19), Virginia Tech and the Ohio State University collected information about how aquaculture/aquaponics farms and allied businesses have been affected by the COVID-19 pandemic. A survey was con…
Producing flow in racetrack atom circuits by stirring Open
We present a study of how macroscopic flow can be produced in Bose-Einstein\ncondensate confined in a "racetrack" potential by stirring with a wide\nrectangular barrier. This potential consists of two half-circle channels\nseparated by str…
Probing Trions at Chemically Tailored Trapping Defects Open
Trions, charged excitons that are reminiscent of hydrogen and positronium ions, have been intensively studied for energy harvesting, light-emitting diodes, lasing, and quantum computing applications because of their inherent connection wit…
Generation and detection of spin-orbit coupled neutron beams Open
Significance Extensive interest has been placed on the techniques to prepare and characterize optical and matter wave orbital angular momentum (OAM) beams and spin correlated OAM beams. They have been shown to be useful in a wide range of …
Tools for designing atom interferometers in a microgravity environment Open
We present a variational model suitable for rapid preliminary design of atom\ninterferometers in a microgravity environment. The model approximates the\nsolution of the 3D rotating--frame Gross--Pitaevskii equation (GPE) as the sum\nof Nc …
Generation of a Lattice of Spin-Orbit Beams via Coherent Averaging Open
We describe a highly robust method, applicable to both electromagnetic and matter-wave beams, that can produce a beam consisting of a lattice of orbital angular momentum (OAM) states coupled to a two-level system. We also define efficient …
Implementing Majorana fermions in a cold-atom honeycomb lattice with textured pairings Open
Recent studies in the realization of Majorana fermion (MF) quasiparticles\nhave focused on engineering topological superconductivity by combining\nconventional superconductors and spin-textured electronic materials. We propose\nan effectiv…
View article: Search for new physics with atoms and molecules
Search for new physics with atoms and molecules Open
Slides for a seminar held by Prof. Marianna Safronova from the University of Delaware held online at the Seminar Series on Precision Physics and Fundamental Symmetries at indico.cern.ch
Induced density correlations in a sonic black hole condensate Open
Analog black/white hole pairs, consisting of a region of supersonic flow, have been achieved in a recent experiment by J. Steinhauer using an elongated Bose-Einstein condensate. A growing standing density wave, and a checkerboard feature i…
Report on 1705.01907v2 Open
Analog black/white hole pairs, consisting of a region of supersonic flow, have been achieved in a recent experiment by J. Steinhauer using an elongated Bose-Einstein condensate.A growing standing density wave, and a checkerboard feature in…