Results 91 to 100 of about 9,826 (198)

Reassignment of the Photoelectron Spectrum of Methylketene Using a Hybrid Model of Harmonic and Anharmonic Oscillators to Compute Franck-Condon Factors. [PDF]

ACS Omega, 2023
Chang JL, Chen HY, Huang YJ.
europepmc   +1 more source

Portable implementation of a quantum thermal bath for molecular dynamics simulations

, 2011
Recently, Dammak and coworkers (H. Dammak, Y. Chalopin, M. Laroche, M. Hayoun, and J.J. Greffet. Quantumthermal bath for molecular dynamics simulation. Phys. Rev.
A.V. Oppenheim, D. Frenkel, David Rodney, F. Ercolessi, G.S. Grest, H. Dammak, Jean-Louis Barrat, K. Lü, K.Y.R. Billah, M. Ceriotti, M.H. Müser   +10 more
core   +4 more sources

Application of the Frobenius method to the Schrodinger equation for a spherically symmetric potential: anharmonic oscillator

, 2005
The power series method has been adapted to compute the spectrum of the Schrodinger equation for central potential of the form $V(r)={d_{-2}\over r^2}+{d_{-1}\over r}+\sum_{i=0}^{\infty} d_{i}r^i$.
Anna Okopińska, Arfken G B, Courant R, Gómez F J, Lam C S, Landau L D, Przemysław Kościk, Roussel K M, Schwatt I J, Trott M, Witwit M R M, Yang C-C, Yukalova E P   +12 more
core   +1 more source

Wigner expansions for partition functions of nonrelativistic and relativistic oscillator systems [PDF]

The equilibrium quantum statistics of various anharmonic oscillator systems including relativistic systems is considered within the Wigner phase space formalism.
Vojta, Guenter, Zylka, Christian
core   +1 more source

Classical Chaos in a Driven One-Dimensional Quartic Anharmonic Oscillator

Computation
In this work, we investigate the transition from regular dynamics to chaotic behavior in a one-dimensional quartic anharmonic classical oscillator driven by a time-dependent external square-wave force.
Yun-Hsi Lin, Jeng-Da Chai
doaj   +1 more source

Centrosymmetric Matrices in the Sinc Collocation Method for Sturm-Liouville Problems

EPJ Web of Conferences, 2016
Recently, we used the Sinc collocation method with the double exponential transformation to compute eigenvalues for singular Sturm-Liouville problems.
Gaudreau Philippe, Safouhi Hassan
doaj   +1 more source

Fourier's Law from Closure Equations

, 2006
We give a rigorous derivation of Fourier's law from a system of closure equations for a nonequilibrium stationary state of a Hamiltonian system of coupled oscillators subjected to heat baths on the boundary.
Antti Kupiainen, F. Bonetto, Jean Bricmont, L. Rey-Bellet, V. E. Zakharov   +4 more
core   +1 more source

Poles of Painlev\'e IV Rationals and their Distribution

, 2018
We study the distribution of singularities (poles and zeros) of rational solutions of the Painlev\'e IV equation by means of the isomonodromic deformation method.
Masoero, Davide, Roffelsen, Pieter
core   +1 more source

On the propagation of a perturbation in an anharmonic system

, 2006
We give a not trivial upper bound on the velocity of disturbances in an infinitely extended anharmonic system at thermal equilibrium. The proof is achieved by combining a control on the non equilibrium dynamics with an explicit use of the state ...
Buttà, P., Caglioti, E., Di Ruzza, S., Marchioro, C.   +3 more
core   +1 more source

Nonlinear (Anharmonic) Casimir Oscillator

, 2014
We want to study the dynamics of a simple linear harmonic micro spring which is under the influence of the quantum Casimir force/pressure and thus behaves as a (an) nonlinear (anharmonic) Casimir oscillator. Generally,the equation of motion of this nonlinear micromechanical Casimir oscillator has no exact solvable (analytical)solution and the turning ...
Razmi, Habibollah, Mohammadi, Mohammad Reza, Abdollahi, Mahnaz, Fazeli, Seyed Mahdi   +3 more
openaire   +2 more sources