Results 51 to 60 of about 17,102 (215)

Optimal Homotopy Asymptotic Method for an Anharmonic Oscillator: Application to the Chen System

Mathematics, 2023
The aim of our work is to obtain the analytic solutions for a new nonlinear anharmonic oscillator by means of the Optimal Homotopy Asymptotic Method (OHAM), using only one iteration. The accuracy of the obtained results comes from the comparison with the
Remus-Daniel Ene, Nicolina Pop
doaj   +1 more source

Anisotropy Factor Spectra for Weakly Allowed Electronic Transitions in Chiral Ketones

ChemPhysChem, Volume 26, Issue 6, March 15, 2025.
Anisotropy factor spectra for the weak n→π*‐type A‐band of chiral ketones cannot be described within the Franck–Condon approximation. Thus, we present such spectra computed by accounting for Herzberg–Teller corrections and compare them to experiments for fenchone, camphor and 3MCP to describe chiroptical properties of these molecules in the mid to near
Leon A. Kerber, Oliver Kreuz, Tom Ring, Hendrike Braun, Robert Berger, Daniel M. Reich   +5 more
wiley   +1 more source

Probing Metal Tip‐Induced Bond Weakening of a Reactive Alkyne Center Aligned via a Rigid Triphenylmethane‐Based Tripod on Au(111) by TERS and DFT

Journal of Raman Spectroscopy, EarlyView.
We investigate tip‐induced bond weakening of a single alkyne center immobilized and aligned upright on Au(111) using a rigid triphenylmethane‐based tripod. By varying the tip–molecule distance, we observe shifts in the ≡C–H and –C≡C– vibrational bands via ultrahigh vacuum low‐temperature tip‐enhanced Raman scattering (TERS).
Gang Li, Simon Mennicken, Lu‐Yao Zhu, Sadaf Ehtesabi, Till Reichenauer, Stephan Kupfer, Daniel Schäfer, Saber Mehrparvar, Gebhard Haberhauer, Yao Zhang, Stefanie Gräfe, Sebastian Schlücker, Zhen‐Chao Dong   +12 more
wiley   +1 more source

Asymptotically Universal Crossover in Perturbation Theory with a Field Cutoff

, 2005
We discuss the crossover between the small and large field cutoff (denoted x_{max}) limits of the perturbative coefficients for a simple integral and the anharmonic oscillator.
Altschul B, L Li, LeGuillou J C, Li L, Reed M, Y Meurice   +5 more
core   +1 more source

Ultimate limits to computation: anharmonic oscillator

The European Physical Journal Plus, 2022
Motivated by studies of ultimate speed of computers, we examine the question of minimum time of orthogonalization in a simple anharmonic oscillator and find an upper bound on the rate of computations. Furthermore, we investigate the growth rate of complexity of operation when the system undergoes a definite perturbation.
Fatemeh Khorasani, Mohammad Reza Tanhayi, Reza Pirmoradian   +2 more
openaire   +2 more sources

Predicting Infrared Optical Properties of Materials Using Machine Learning Interatomic Potentials

Materials Genome Engineering Advances, EarlyView.
This work proposes a new fast computing framework for infrared reflectance spectra, MTP‐FIRE, based on machine learning potential, which can achieve the same accuracy as the existing first‐principles calculation, but can be two orders of magnitude faster on average.
Lianduan Zeng, Xiao Zhou, Xinxi Lu, Li Huang, Lan Yang, Lihao Wang, Gang Liu, Zhongyang Wang, Tongxiang Fan   +8 more
wiley   +1 more source

Injection locking in an optomechanical coherent phonon source

Nanophotonics, 2021
Spontaneous locking of the phase of a coherent phonon source to an external reference is demonstrated in a deeply sideband-unresolved optomechanical system.
Arregui Guillermo, Colombano Martín F., Maire Jeremie, Pitanti Alessandro, Capuj Néstor E., Griol Amadeu, Martínez Alejandro, Sotomayor-Torres Clivia M., Navarro-Urrios Daniel   +8 more
doaj   +1 more source

Dirac bound states of anharmonic oscillator in external fields

, 2014
We explore the effect of the external magnetic and Aharonov-Bohm (AB) flux fields on the energy levels of Dirac particle subjects to mixed scalar and vector anharmonic oscillator field in the two-dimensional (2D) space.
Falaye, Babatunde J., Hamzavia, Majid, Ikhdair, Sameer M.   +2 more
core   +1 more source

Unveiling Phonon Contributions to Thermal Conductivity and the Applicability of the Wiedemann—Franz Law in Ruthenium and Tungsten Thin Films

Advanced Functional Materials, Volume 36, Issue 12, 9 February 2026.
Thermal transport in Ru and W thin films is studied using steady‐state thermoreflectance, ultrafast pump–probe spectroscopy, infrared‐visible spectroscopy, and computations. Significant Lorenz number deviations reveal strong phonon contributions, reaching 45% in Ru and 62% in W.
Md. Rafiqul Islam, Pravin Karna, Niraj Bhatt, Sandip Thakur, Helge Heinrich, Daniel M. Hirt, Saman Zare, Christopher Jezewski, Rinus T.P. Lee, Kandabara Tapily, John T. Gaskins, Colin D. Landon, Sean W. King, Ashutosh Giri, Patrick E. Hopkins   +14 more
wiley   +1 more source

Remarks on symmetric anharmonic oscillator

Journal of Low Frequency Noise, Vibration and Active Control
In this study, we analyze a symmetrical anharmonic oscillator that differs from a basic harmonic oscillator by including additional terms in the potential energy function.
Rabab Jarrar, Vedat Suat Erturk, Jihad Asad   +2 more
doaj   +1 more source