Results 31 to 40 of about 876,142 (299)
A semi-classical trace formula at a totally degenerate critical level [PDF]
Communications in Mathematical Physics 247 (2004), no. 2, 513--526, 2006 We study the semi-classical trace formula at a critical energy level for an $h$-pseudo-differential operator on $\mathbb{R}^{n}$ whose principal symbol has a totally degenerate critical point for that energy. This problem is studied for a large time behavior and under the hypothesis that the principal symbol of the operator has a local extremum at the ...
arxiv +1 more source
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
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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
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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
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A semi-classical trace formula at a non-degenerate critical level [PDF]
Journal of Functional Analysis. Volume 208, Issue 2 , 15 March
2004, Pages 446-481, 2006 We study the semi-classical trace formula at a critical energy level for a $h$-pseudo-differential operator whose principal symbol has a unique non-degenerate critical point for that energy. This leads to the study of Hamiltonian systems near equilibrium and near the non-zero periods of the linearized flow.
arxiv +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
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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
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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
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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
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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
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