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200 papers

The FORS1 instrument on the ESO Very Large Telescope was used to obtain low-resolution circular polarised spectra of nearly a thousand different stars, with the aim of measuring their mean longitudinal magnetic fields. A catalogue of FORS1…

Solar and Stellar Astrophysics · Physics 2015-11-04 S. Bagnulo , L. Fossati , J. D. Landstreet , C. Izzo

Optically-detected paramagnetic centers in wide-bandgap semiconductors are emerging as a promising platform for nanoscale metrology at room temperature. Of particular interest are applications where the center is used as a probe to…

Mesoscale and Nanoscale Physics · Physics 2015-12-09 Abdelghani Laraoui , Daniela Pagliero , Carlos A. Meriles

Using the recently developed method we calculate the crystal field parameters in yttrium and lutetium aluminum garnets doped with seven trivalent Kramers rare-earth ions. We then insert calculated parameters into the atomic-like Hamiltonian…

Strongly Correlated Electrons · Physics 2015-08-06 Eva Mihokova , Pavel Novak , Valentin V. Laguta

We implement for the first time the simulated annealing method (SAM) to the problem of searching for the global minimum in the hyper-surface of the chi-square function which depends on the values of the parameters of a Skyrme type effective…

Nuclear Theory · Physics 2008-11-26 B. K. Agrawal , S. Shlomo , V. Kim Au

Solid-state magnetometers like the Nitrogen-Vacancy center in diamond have been of paramount importance for the development of quantum sensing with nanoscale spatial resolution. The basic protocol is a Ramsey sequence, that imprints an…

Quantum Physics · Physics 2021-05-04 Raúl Coto , Hossein T. Dinani , Ariel Norambuena , Mo Chen , Jerónimo R. Maze

The behavior of orbits in charged-particle beam transport systems, including both linear and circular accelerators as well as final focus sections and spectrometers, can depend sensitively on nonlinear fringe-field and high-order-multipole…

Accelerator Physics · Physics 2014-11-20 Chad E. Mitchell , Alex J. Dragt

We have undertaken a major enhancement of our IDL-based simulation tools developed earlier for modeling microwave and X-ray emission. The object-based architecture provides an interactive graphical user interface that allows the user to…

Solar and Stellar Astrophysics · Physics 2015-06-22 Gelu M. Nita , Gregory D. Fleishman , Alexey A. Kuznetsov , Eduard P. Kontar , Dale E. Gary

We address again the old problem of calculating the radion effective potential in Randall-Sundrum scenarios, with the Goldberger-Wise stabilization mechanism. Various prescriptions have been used in the literature, most of them based on…

High Energy Physics - Phenomenology · Physics 2020-09-23 J. M. Lizana , M. Olechowski , S. Pokorski

We present a method for performing atomistic spin dynamic simulations. A comprehensive summary of all pertinent details for performing the simulations such as equations of motions, models for including temperature, methods of extracting…

Materials Science · Physics 2014-04-04 B. Skubic , J. Hellsvik , L. Nordström , O. Eriksson

Understanding and predicting the thermodynamic properties of point defects in semiconductors and insulators would greatly aid in the design of novel materials and allow tuning the properties of existing ones. As a matter of fact,…

Materials Science · Physics 2021-04-07 Marco Arrigoni , Georg K. H. Madsen

The scheme for measurement of the state of a single spin (or a few spin system) based on the single-electron turnstile and injection of spin polarized electrons from magnetic metal contacts is proposed. Applications to the recent proposal…

Quantum Physics · Physics 2007-05-23 S. N. Molotkov , S. S. Nazin

Numerical simulations of neutron star mergers represent an essential step toward interpreting the full complexity of multimessenger observations and constraining the properties of supranuclear matter. Currently, simulations are limited by…

High Energy Astrophysical Phenomena · Physics 2023-08-08 Isaac Legred , Yoonsoo Kim , Nils Deppe , Katerina Chatziioannou , Francois Foucart , François Hébert , Lawrence E. Kidder

Determining the local symmetry of luminescent centers in crystals is critical for understanding and controlling their optical transitions, yet current methods are limited by stringent experimental requirements and ambiguous symmetry…

We report the synthesis of powder and single-crystal samples of the cerium pyrohafnate and their characterization using neutron diffraction, thermogravimetry and X-ray absorption spectroscopy. We evaluate the amount of non-magnetic…

We describe a computer application designed to analyze hyperspectral data collected by the Compact Infrared Spectrometer for Mars (CRISM). The application links the spectral, imaging and mapping perspectives on the eventual CRISM dataset by…

Instrumentation and Methods for Astrophysics · Physics 2014-01-29 Adrian J. Brown , Michael Storrie-Lombardi

We calculate ground state properties (energy, magnetization, susceptibility) and one-particle spectra for the $S = 1$ Heisenberg antiferromagnet with easy-axis or easy-plane single site anisotropy, on the square lattice. Series expansions…

Other Condensed Matter · Physics 2008-04-09 J. Oitmaa , C. J. Hamer

A new release of the parametric detector Monte Carlo program \verb+SIMDET+ (version 4.01) is now available. We describe the principles of operation and the usage of this program to simulate the response of a detector for the TESLA linear…

High Energy Physics - Experiment · Physics 2007-05-23 M. Pohl , H. J. Schreiber

We describe the Zonal Atmospheric Stellar Parameters Estimator (ZASPE), a new algorithm, and its associated code, for determining precise stellar atmospheric parameters and their uncertainties from high resolution echelle spectra of…

Instrumentation and Methods for Astrophysics · Physics 2017-01-25 Rafael Brahm , Andres Jordan , Joel Hartman , Gaspar Bakos

Stable or metastable crystal structures of assembled atoms can be predicted by finding the global or local minima of the energy surface within a broad space of atomic configurations. Generally, this requires repeated first-principles energy…

The application package "IONORT" for the calculation of ray-tracing can be used by customers using the Windows operating system. It is a program whose interface with the user is created in MATLAB. In fact, the program launches an executable…

Geophysics · Physics 2010-11-19 Cesidio Bianchi , Alessandro Settimi , Adriano Azzarone