Results 31 to 40 of about 1,036,661 (329)
Tetraquark operators in lattice QCD and exotic flavour states in the charm sector
Journal of High Energy Physics, 2017 We present a general class of operators resembling compact tetraquarks which have a range of colour-flavour-spin structures, transform irreducibly under the symmetries of the lattice and respect other relevant symmetries.
Gavin K. C. Cheung +4 more
doaj +1 more source
Positrons vs electrons channeling in silicon crystal: energy levels, wave functions and quantum chaos manifestations [PDF]
, 2017 The motion of fast electrons through the crystal during axial channeling could be regular and chaotic. The dynamical chaos in quantum systems manifests itself in both statistical properties of energy spectra and morphology of wave functions of the ...
N. Shul'ga +4 more
semanticscholar +1 more source
The generalized relativistic harmonic oscillator with a point interaction
Heliyon, 2021 We study the perturbation of the one-dimensional generalized relativistic harmonic oscillator (GRHO) by a Lorentz scalar delta-shaped interaction. By exactly solving the implied Dirac equation, we show that the presence of the singular potential brings ...
Y. Chargui +2 more
doaj
Physical Review Research, 2022 We present a study on the lifting of degeneracy of the size-quantized energy levels in an electrostatically defined quantum point contact in bilayer graphene by the application of in-plane magnetic fields.
Vanessa Gall +3 more
doaj +1 more source
Features of third-order optical nonlinearity in carbon disulfide
Semiconductor Physics, Quantum Electronics & Optoelectronics, 2019 Degenerate four-wave mixing (DFWM) processes in carbon disulfide have been experimentally studied applying the wavelength dependent femtosecond laser source. The quantum mechanical perturbation theory was applied to analyze the experimental data.
L.V. Poperenko
doaj +1 more source
Physical Review Physics Education Research, 2022 Several recent studies have employed item response theory (IRT) to rank incorrect responses to commonly used research-based multiple-choice assessments. These studies use Bock’s nominal response model (NRM) for applying IRT to categorical (nondichotomous)
Trevor I. Smith, Nasrine Bendjilali
doaj +1 more source
Integral equation for numerical solution of stationary quantum-mechanical problems
Advanced Engineering Research, 2016 The work objective is to describe the numerical solution method for the stationary Schrödinger equation based on the application of the integral equation identical to the Schrödinger equation.
Sergey Yu. Knyazev
doaj +1 more source
Nanoscale Research Letters, 2008 We have studied ultrafast carrier dynamics in oxidized silicon nanocrystals (NCs) and the role that surface-related states play in the various relaxation mechanisms over a broad range of photon excitation energy corresponding to energy levels below and ...
Nassiopoulou AG +2 more
doaj +1 more source
Heliyon, 2023 In this paper, the bound state solutions of the radial Schrödinger equation are obtained in closed form under an improved Scarf II potential energy function (ISPEF) constrained by external magnetic and Aharonov-Bohm (AB) flux fields.
E.S. Eyube +6 more
doaj
The multilevel pairing Hamiltonian versus the degenerate case
, 2006 We study the pairing Hamiltonian in a set of non degenerate levels. First, we review in the path integral framework the spontaneous breaking of the U(1) symmetry occurring in such a system for the degenerate situation.
A. Molinari +21 more
core +2 more sources