Results 41 to 50 of about 151,578 (271)

Lissajous curves and semiclassical theory: The two-dimensional harmonic oscillator [PDF]

, 2006
The semiclassical treatment of the two-dimensional harmonic oscillator provides an instructive example of the relation between classical motion and the quantum mechanical energy spectrum.
Brack M., Gert-Ludwig Ingold, Goldstein H., Lissajous J., Roland Doll, Tinkham M.   +5 more
core   +2 more sources

First harmonic injection locking of 24-GHz-oscillators [PDF]

Advances in Radio Science, 2003
An increasing number of applications is proposed for the 24 GHz ISM-band, like automotive radar systems and short-range communication links. These applications demand for oscillators providing moderate output power of a few mW and moderate frequency ...
M. R. Kühn, E. M. Biebl
doaj  

Discrete time model of self-oscillations with spectral line widening

Физика волновых процессов и радиотехнические системы, 2022
An algorithm for generating quasi-harmonic self-oscillations with a uniformly widened spectral line is presented. The algorithm is based on the equation of motion of the Thomson-type DT-oscillator, which introduced a random effect in the form of band ...
Valery V. Zaitsev, Alexander V. Karlov, Husamuldin K.-M. Alalvan   +2 more
doaj   +1 more source

Modulating Two‐Photon Absorption in a Pyrene‐Based MOF Series: An In‐Depth Investigation of Structure–Property Relationships

Advanced Functional Materials, EarlyView.
This study investigates H4TBAPy‐based metal–organic frameworks (MOFs) ‐ NU‐1000, NU‐901, SrTBAPy, and BaTBAPy ‐ for multiphoton absorption (MPA) performance. It observes topology‐dependent variations in the 2PA cross‐section, with BaTBAPy exhibiting the highest activity.
Simon N. Deger, Helmy Pacheco Hernandez, Yang Cui, Hongxing Hao, Vanessa Ramm, David C. Mayer, Khai‐Nghi Truong, Roland A. Fischer, Jürgen Hauer, Mariana Kozlowska, Alexander Pöthig   +10 more
wiley   +1 more source

An Effective Solution of the Cube-Root Truly Nonlinear Oscillator: Extended Iteration Procedure

International Journal of Differential Equations, 2021
The cube-root truly nonlinear oscillator and the inverse cube-root truly nonlinear oscillator are the most meaningful and classical nonlinear ordinary differential equations on behalf of its various applications in science and engineering.
B. M. Ikramul Haque, M. M. Ayub Hossain
doaj   +1 more source

Thermodynamics of the Harmonic Oscillator: Wien's Displacement Law and the Planck Spectrum

, 2002
A thermodynamic analysis of the harmonic oscillator is presented. Motivation for the study is provided by the blackbody radiation spectrum; when blackbody radiation is regarded as a system of noninteracting harmonic oscillator modes, the thermodynamics ...
Boyer, Timothy H.
core   +1 more source

Non-symplectic symmetries and bi-Hamiltonian structures of the rational Harmonic Oscillator [PDF]

, 2002
The existence of bi-Hamiltonian structures for the rational Harmonic Oscillator (non-central harmonic oscillator with rational ratio of frequencies) is analyzed by making use of the geometric theory of symmetries.
Brouzet R, Cariñena J F, Fradkin D M, Giuseppe Marmo, Jos  F Cari ena, López C, Manuel F Ra ada, Marmo G, Morosi C, Nunes da Costa J M, Perelomov A M   +10 more
core   +2 more sources

Tuning the Electronic Structure and Spin State of Fe─N─C Catalysts Using an Axial Oxygen Ligand and Fe Clusters for High‐Efficiency Rechargeable Zinc–Air Batteries

Advanced Functional Materials, EarlyView.
A FeN4─O/Clu@NC‐0.1Ac catalyst containing atomically‐dispersed FeN4─O sites (medium‐spin Fe2+) and Fe clusters delivered a half‐wave potential of 0.89 V for ORR and an overpotential of 330 mV at 10 mA cm−2 for OER in 0.1 m KOH. When the catalyst was used in a rechargeable Zn–air battery, a power density of 284.5 mW cm−2 was achieved with excellent ...
Yongfang Zhou, Yu Mao, Mengyao Chang, Ziyun Wang, Wenke Xie, Cuizhu Ye, Shanghai Wei, Lars Thomsen, Geoffrey I. N. Waterhouse   +8 more
wiley   +1 more source

Approximate Solution of Schrödinger Equation with Pseudo-Gaussian Potential Viewed as a Perturbation

Annals of West University of Timisoara: Physics, 2015
We consider the Schrödinger equation with pseudo-Gaussian potential and point out that it is basically made up by a term representing the harmonic oscillator potential and an additional term, which is actually a power series that converges rapidly. Based
Iacob Theodor-Felix, Lute Marina, Iacob Felix   +2 more
doaj   +1 more source

Quantum quench in non-relativistic fermionic field theory: harmonic traps and 2d string theory

Journal of High Energy Physics, 2019
We investigate a class of exactly solvable quantum quench protocols with a finite quench rate in systems of one dimensional non-relativistic fermions in external harmonic oscillator or inverted harmonic oscillator potentials, with time dependent masses ...
Sumit R. Das, Shaun Hampton, Sinong Liu
doaj   +1 more source