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Geometrothermodynamics is a geometric theory which combines thermodynamics with contact and Riemannian geometry. In this work we use the formalism of geometrothermodynamics to infer cosmological models which predict the observed speed up.…

General Relativity and Quantum Cosmology · Physics 2025-11-12 Alessandro Bravetti , Orlando Luongo

We study the effect of spatial confinement on the strength of propulsive diffusiophoretic forces acting on a particle that generates density gradients by exploiting the chemical free energy of its environment. Using a recently proposed…

Statistical Mechanics · Physics 2007-09-17 M. N. Popescu , S. Dietrich , G. Oshanin

The influence of the low-frequency gravitational waves coupled with electromagnetic waves in material media on the test masses is investigated. The propagation of coupled gravitational waves in rarefied gases and cold magnetized plasma is…

General Relativity and Quantum Cosmology · Physics 2026-03-11 A. N. Morozov , I. V. Fomin

Measurements with a glider show that thermal theories published for decades need to be revised. We present a corrected view of temperature and humidity in thermal updrafts.

Atmospheric and Oceanic Physics · Physics 2022-11-02 Oliver Predelli , Ronald Niederhagen

While the electromagnetic force is microscopically simply the Lorentz force, its macroscopic form is more complicated, and given by expressions such as the Maxwell stress tensor and the Kelvin force. Their derivation is fairly opaque, at…

Soft Condensed Matter · Physics 2012-07-23 Mario Liu , Klaus Stierstadt

The recoil optical force that acts on emitters near a surface or waveguide relies on near-field directionality and conservation of momentum. It features desirable properties uncommon in optical forces, such as the ability to produce it via…

Optics · Physics 2020-07-02 J. A. Girón-Sedas , Francisco J. Rodríguez-Fortuño

In recent years, an energetic experimental program has set quite stringent limits on a possible "non - 1/r^2" dependence on gravity at short length scales. This effort has been largely driven by the predictions of theories based on…

High Energy Physics - Phenomenology · Physics 2008-11-26 Geoffrey L. Greene , Vladimir Gudkov

In a recent letter [Phys. Rev. Lett. 91, 220801 (2003)], V. Mkrtchian and co-workers calculated the radiation pressure force on a moving body, assuming the electromagnetic field to be at temperature $T,$ and the velocity to be much smaller…

Quantum Physics · Physics 2007-05-23 P. A. Maia Neto , C. Farina

Gravitational wave detector technology provides high-precision measurement apparatuses that, if combined with a modulated particle source, have the potential to measure and constrain particle interactions in a novel way, by measuring the…

High Energy Physics - Phenomenology · Physics 2018-10-29 Christoph Englert , Stefan Hild , Michael Spannowsky

We consider a two-dimensional gas of colliding charged particles confined to finite size containers of various geometries and subjected to a uniform orthogonal magnetic field. The gas spectral densities are characterized by a broad peak at…

Chaotic Dynamics · Physics 2011-12-30 Andrey Pototsky , Peter Hänggi , Fabio Marchesoni , Sergey Savel'ev

Micron sized, neutral, non-dielectric particles immersed in a viscous fluid can be trapped in the focal plane of a Gaussian beam. A particle can absorb energy from such a beam with a large radial intensity gradient, resulting in substantial…

Fluid Dynamics · Physics 2007-05-23 William L. Clarke

Exitation of atomic levels due to interaction with electromagnetic waves has been the subject of numerous works, both experimental and theoretical. This topic became of interest in accelerator physics in relation to high efficiency charge…

Pattern Formation and Solitons · Physics 2007-08-31 V. Danilov

Thermal modeling of the LISA gravitational reference sensor (GRS) includes such effects as outgassing from the proof mass and its housing and the radiometer effect. Experimental data in conditions emulating the LISA GRS are required to…

General Relativity and Quantum Cosmology · Physics 2008-11-26 Scott E Pollack , Stephan Schlamminger , Jens H Gundlach

Nonlinear forces allow motion of a mechanical oscillator to be squeezed below the zero-point motion. Of existing methods, mechanical parametric amplification is relatively accessible, but previously thought to be limited to 3dB of squeezing…

Quantum Physics · Physics 2011-11-17 Alex Szorkovszky , Andrew C. Doherty , Glen I. Harris , Warwick P. Bowen

High temperature radiating Air is produced experimentally by focusing a shock wave with the help of a spherically converging test section attached to a shock tube. The converging section concentrates the shock to a point with minimum…

Fluid Dynamics · Physics 2022-07-25 Saranyamol V. S. , Mohammed Ibrahim S

Recent experiments claimed that the enhancement of catalytic reaction rates occurs via the reduction of activation barriers driven by non-equilibrium (``hot'') electrons in plasmonic metal nanoparticles. These experiments place plasmonic…

Chemical Physics · Physics 2020-04-22 Yonatan Sivan , Ieng Wai Un , Yonatan Dubi

Gravitational wave echoes may imply physics beyond general relativity; however, several approaches to searching for echoes require fitting the data to toy templates which are not physically motivated. Here, I create a procedure which…

General Relativity and Quantum Cosmology · Physics 2020-02-26 Randy S. Conklin

We discuss the possibility to enhance the sensitivity of optical interferometric devices by increasing its open area using an external field gradient that act differently on the two arms of the interfer-ometers. The use of combined electric…

Atomic Physics · Physics 2020-02-26 D. Comparat

We discuss experimental schemes to measure the Casimir force and short range forces from hypothetical modified gravity with unprecedented sensitivity using highly sensitive prototype gravitational wave detectors as displacement sensors. The…

General Relativity and Quantum Cosmology · Physics 2014-11-21 G. Rajalakshmi , C. S. Unnikrishnan

We consider the use of a microwave parametric converter for the direct detection of gravitational effects at the LHC. Because of the extra dimensions the strength of the gravitational interaction in the bulk grows at high energies. This…

High Energy Physics - Phenomenology · Physics 2007-05-23 Adrian C. Melissinos