Results 1 to 10 of about 617 (136)

Violation of the virial theorem and generalized equipartition theorem for logarithmic oscillators serving as a thermostat [PDF]

Scientific Reports, 2017
A logarithmic oscillator has been proposed to serve as a thermostat recently since it has a peculiar property of infinite heat capacity according to the virial theorem.
Kai Chen, Dahai He, Hong Zhao
doaj   +2 more sources

A Density Functional Theory-Based Investigation of a pH- and Redox-Driven Tristable [2]Rotaxane in CH₂Cl₂ Dilute Solution. [PDF]

ChemistryOpen
A recently proposed pH‐ and redox‐driven tristable [2]rotaxane in CH2Cl2 dilute solution is investigated, combining converged Density Functional Theory (DFT)‐based electronic eigenstates. The theoretical picture that has emerged allows to identify the local supramolecular interaction patterns capable of modulating the mutual position of a DB24C8 ...
Zazza C, Sanna N, Borocci S, Grandinetti F.   +3 more
europepmc   +2 more sources

Gravitational Hamiltonian Systems and the Retarded Gravity Inequality [PDF]

Entropy
Gravity and electromagnetic interactions are the only fundamental physical interactions (outside the nuclear domain). In this work, we shall concentrate on Hamiltonians containing gravitational interaction, which according to general relativity must be ...
Asher Yahalom
doaj   +2 more sources

Basic Stellar Physics [PDF]

EPJ Web of Conferences, 2023
Polytropes, Virial theorem, evolutionary time scales, degrees of freedom, radiative transport, molecular weight, degeneracy, Jeans mass, and Eddington luminosity are basic ingredients to describe the physics of stars.
Palmerini S.
doaj   +1 more source

Variational Methods for Atoms and the Virial Theorem

Atoms, 2022
In the case of the one-electron Dirac equation with a point nucleus, the virial theorem (VT) states that the ratio of the kinetic energy to potential energy is exactly −1, a ratio that can be an independent test of the accuracy of a computed solution ...
Charlotte Froese Fischer, Michel Godefroid   +1 more
doaj   +1 more source

Virial theorem in scalar tensor fourth order gravity

European Physical Journal C: Particles and Fields, 2021
In this paper, we study, in the Newtonian limit, the virial theorem in the context of a scalar tensor fourth order gravity. In particular, we show, that for a isolated galaxy in viral equilibrium, a specific class of scalar tensor fourth order gravity, i.
A. Capolupo, G. Lambiase, A. Stabile, An. Stabile   +3 more
doaj   +1 more source

Quantum complexity and the virial theorem

Journal of High Energy Physics, 2018
It is conjectured that in the geometric formulation of quantum computing, one can study quantum complexity through classical entropy of statistical ensembles established non-relativistically in the group manifold of unitary operators.
Ning Bao, Junyu Liu
doaj   +1 more source

Virial Theorem in Nonlocal Newtonian Gravity

Universe, 2016
Nonlocal gravity is the recent classical nonlocal generalization of Einstein’s theory of gravitation in which the past history of the gravitational field is taken into account. In this theory, nonlocality appears to simulate dark matter.
Bahram Mashhoon
doaj   +1 more source

Ionospheric and boundary contributions to the Dessler-Parker-Sckopke formula for Dst [PDF]

Annales Geophysicae, 2006
The Dessler-Parker-Sckopke formula for the disturbance magnetic field averaged over the Earth's surface, universally used to interpret the geomagnetic Dst index, can be generalized, by using the well known method of deriving it from the virial theorem,
V. M. Vasyliūnas
doaj   +1 more source

Short distance modification of the quantum virial theorem

Physics Letters B, 2017
In this letter, we will analyse the deformation of a semi-classical gravitational system from minimal measurable length scale. In the semi-classical approximation, the gravitational field will be analysed as a classical field, and the matter fields will ...
Qin Zhao, Mir Faizal, Zaid Zaz
doaj   +1 more source