Viser treff 1-20 av 56

• #### Anisotropic contribution to the van der Waals and the Casimir-Polder energies for CO2 and CH4 molecules near surfaces and thin film ﻿

(Journal article; Peer reviewed, 2015)
In order to understand why carbon dioxide ( CO 2 ) and methane ( CH 4 ) molecules interact differently with surfaces, we investigate the Casimir-Polder energy of a linearly polarizable CO 2 molecule and an isotropically ...
• #### Axion electrodynamics and the axionic Casimir effect ﻿

(Peer reviewed; Journal article, 2021)
A general scheme for axion electrodynamics is given, in which a surrounding medium of constant permittivity and permeability is assumed. Then, as an application, we provide simple numerical estimates for the electromagnetic ...
• #### Blending and characteristics of electrochemical double-layer capacitor device assembled from plasticized proton ion conducting chitosan:dextran:NH4PF6 polymer electrolytes ﻿

(Peer reviewed; Journal article, 2020)
This research paper investigates the electrochemical performance of chitosan (CS): dextran (DX) polymer-blend electrolytes (PBEs), which have been developed successfully with the incorporation of ammonium hexafluorophosphate ...
• #### Can the gamma-ray bursts travelling through the interstellar space be explained without invoking the drastic assumption of Lorentz invariance violation? ﻿

(Peer reviewed; Journal article, 2021)
Experimental observations indicate that gamma-ray bursts (GRB) and high-energy neutrino bursts may travel at different speeds with a typical delay measured at the order of hours or days. We discuss two potential interpretations ...
• #### Can the Hubble tension be resolved by bulk viscosity? ﻿

(Journal article; Peer reviewed, 2021)
We show that the cosmic bulk viscosity estimated in our previous works is sufficient to bridge the H0 value inferred from observations of the early universe with the value inferred from the local (late) universe.
• #### The Casimir effect for fermionic currents in conical rings with applications to graphene ribbons ﻿

(Peer reviewed; Journal article, 2020)
We investigate the combined effects of boundaries and topology on the vacuum expectation values (VEVs) of the charge and current densities for a massive 2D fermionic field confined on a conical ring threaded by a magnetic ...
• #### Casimir energies for isorefractive or diaphanous balls ﻿

(Journal article; Peer reviewed, 2018)
It is known that the Casimir self-energy of a homogeneous dielectric ball is divergent, although a finite self-energy can be extracted through second order in the deviation of the permittivity from the vacuum value. The ...
• #### Casimir energies of self-similar plate configurations ﻿

(Journal article; Peer reviewed, 2016)
We construct various self-similar configurations using parallel δ-function plates and show that it is possible to evaluate the Casimir interaction energy of these configurations using the idea of self-similarity alone. We ...
• #### Casimir force and its relation to surface tension ﻿

(Journal article; Peer reviewed, 2017)
From energy considerations there is reason to expect that the work done by Casimir forces during a slow displacement of the parallel plates reflects the free energy of the surface tension of the adjacent surfaces. We show ...
• #### Casimir force between a half-space and a plate of finite thickness ﻿

(Journal article; Peer reviewed, 2016)
Zero-frequency Casimir theory is analyzed from different viewpoints, with the aim of obtaining further insight into the delicate Drude-plasma issue that turns up when one considers thermal corrections to the Casimir force. ...
• #### Casimir forces in a plasma: possible connections to Yukawa potentials ﻿

(Journal article; Peer reviewed, 2014)
We present theoretical and numerical results for the screened Casimir effect between perfect metal surfaces in a plasma. We show how the Casimir effect in an electron-positron plasma can provide an important contribution ...
• #### Casimir friction between dense polarizable media ﻿

(Journal article; Peer reviewed, 2013)
The present paper—a continuation of our recent series of papers on Casimir friction for a pair of particles at low relative particle velocity—extends the analysis, so as to include dense media. The situation becomes, in ...
• #### Casimir friction between dense polarizable media ﻿

(Peer reviewed; Journal article, 2013)
The present paper—a continuation of our recent series of papers on Casimir friction for a pair of particles at low relative particle velocity—extends the analysis, so as to include dense media. The situation becomes, in ...
• #### Casimir quantum levitation tuned by means of material properties and geometries ﻿

(Journal article; Peer reviewed, 2014)
The Casimir force between two surfaces is attractive in most cases. Although stable suspension of nano-objects has been achieved, the sophisticated geometries make them difficult to be merged with well-established thin ...
• #### Characteristics of glycerolized chitosan:NH4NO3-based polymer electrolyte for energy storage devices with extremely high specific capacitance and energy density over 1000 cycles ﻿

(Peer reviewed; Journal article, 2020)
In this work, plasticized polymer electrolyte films consisting of chitosan, ammonium nitrate (NH4NO3) and glycerol for utilization in energy storage devices was presented. Various microscopic, spectroscopic and electrochemical ...
• #### Compatible solid polymer electrolyte based on methyl cellulose for energy storage application: Structural, electrical, and electrochemical properties ﻿

(Peer reviewed; Journal article, 2020)
Compatible Green polymer electrolytes based on methyl cellulose (MC) have been prepared for energy storage electrochemical double-layer capacitor (EDLC) application. X-ray diffraction was accomplished for structural ...
• #### Covariant Quantum Electrodynamics in Terms of a Possible Ether Flow ﻿

(Theoretical Physics Seminar in Trondheim;4, Preprint, 1971)
This paper from 1971 has a special history. At that time the present author was working with the covariant quantization procedure for an electromagnetic field in a dielectric medium. In such a theory, the commutator for ...
• #### Distance-dependent sign reversal in the Casimir-Lifshitz torque ﻿

(Journal article; Peer reviewed, 2018)
The Casimir-Lifshitz torque between two biaxially polarizable anisotropic planar slabs is shown to exhibit a nontrivial sign reversal in its rotational sense. The critical distance $a_c$ between the slabs that marks this ...
• #### Effect of excess charge carriers and fluid medium on the magnitude and sign of the Casimir-Lifshitz torque ﻿

(Journal article; Peer reviewed, 2019)
Last year, we reported a perturbative theory of the Casimir-Lifshitz torque between planar biaxially anisotropic materials in the retarded limit [Thiyam et al., Phys. Rev. Lett. 120, 131601 (2018)], which is applied here ...
• #### The effect of thermal radiation on singularities in the dark universe ﻿

(Peer reviewed; Journal article, 2021)
Cosmological models with an inhomogeneous viscous dark fluid, coupled with dark matter in the Friedmann–Robertson–Walker (FRW) flat universe, are considered. The influence of thermal effects caused by Hawking radiation on ...