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We study the effects of thermal fluctuations on a small elastic ring. We derive analytical expressions for the correlation functions of the Euler angles, for the real space two--point correlation functions and for the probability…

Soft Condensed Matter · Physics 2007-05-23 Y. Rabin , S. Panyukov

In laser gravitational waves detectors optical loss restricts sensitivity. We discuss polarization scattering as one more possible mechanism of optical losses. Circulated inside interferometer light is polarized and after reflection its…

Instrumentation and Methods for Astrophysics · Physics 2020-02-20 Sergey P. Vyatchanin

We present theoretical analysis and the results of measurements of fundamental thermorefractive fluctuations in microspheres. Experimentally measured noise spectra are consistent with the theoretical model.

Statistical Mechanics · Physics 2009-11-10 M. L. Gorodetsky , I. S. Grudinin

We measure spectral properties of surface thermal fluctuations of liquids, solids, complex fluids and biological matter using light scattering methods. The random thermal fluctuations are delineated from random noise at sub-shot noise…

Soft Condensed Matter · Physics 2015-05-13 Takahisa Mitsui , Kenichiro Aoki

The contribution of thermal fluctuations to the widths of isoscalar giant multipole resonances (GMR) in heated nuclei is studied. Starting from the collisional kinetic equation, it is shown that an additional contribution to the nuclear…

Nuclear Theory · Physics 2009-11-10 V. M. Kolomietz , S. V. Lukyanov , S. Shlomo

Dynamics of double membrane films is investigated in the long-wavelength limit including the overdamped squeezing mode. We demonstrate that thermal fluctuations essentially modify the character of the mode due to its nonlinear coupling to…

Soft Condensed Matter · Physics 2009-10-30 E. I. Kats , V. V. Lebedev , S. V. Malinin

We present the calculation of thermal noise in interferometric gravitational-wave detectors due to the thermal fluctuations of the beam splitter (BS). This work makes use of a recently developed method of the analysis of thermal noise in…

Instrumentation and Methods for Astrophysics · Physics 2018-10-31 Johannes Dickmann , Stefanie Kroker , Yuri Levin , Ronny Nawrodt , Sergey Vyatchanin

We show that the spatial coherence of thermal radiation can be manipulated in time-modulated photonic systems supporting surface polaritons. We develop a fluctuational electrodynamics formalism for such systems to calculate the…

Optics · Physics 2023-03-01 Renwen Yu , Shanhui Fan

The reliability of Langmuir probe measurements for plasma-turbulence investigations is studied on GEMR gyro-fluid simulations and compared with results from conditionally sampled I-V characteristics as well as self-emitting probe…

Plasma Physics · Physics 2015-06-03 B. Nold , T. T. Ribeiro , M. Ramisch , Z. Huang , H. W. Müller , B. D. Scott , U. Stroth , ASDEX Upgrade Team

We calculate using loop expansion the effect of fluctuations on the structure function and magnetization of the vortex lattice and compare it with existing MC results. In addition to renormalization of the height of the Bragg peaks of the…

Superconductivity · Physics 2009-10-31 Dingping Li , Baruch Rosenstein

The energy of a finite system thermally connected to a thermal reservoir may fluctuate, while the temperature is a constant representing a thermodynamic property of the reservoir. The finite system can also be used as a thermometer for the…

Statistical Mechanics · Physics 2015-05-28 M. Falcioni , A. Puglisi , A. Sarracino , D. Villamaina , A. Vulpiani

The evolution equation for inhomogeneous and anisotropic temperature fluctuations inside a medium is derived within the ambit of Boltzmann Transport Equation. Also, taking some existing realistic inputs we have analyzed the Fourier space…

High Energy Physics - Phenomenology · Physics 2016-03-17 Trambak Bhattacharya , Prakhar Garg , Raghunath Sahoo , Prasant Samantray

It is shown that an optical parametric amplifier inside a cavity can considerably improve the cooling of the micromechanical mirror by radiation pressure. The micromechanical mirror can be cooled from room temperature 300 K to sub-Kelvin…

Quantum Physics · Physics 2009-11-21 Sumei Huang , G. S. Agarwal

A criterium is derived to understand the relevance of thermal effects resulting from high rate mechanical actions on glass surface. The criterium is based on the concept of characteristic contact time of the load to the glass surface. This…

Materials Science · Physics 2023-04-18 Guglielmo Macrelli

The effect of thermal fluctuations on the temperature dependence of the topological index C1 of the chiral d+id superconducting phase of a two-dimensional single-band model on a triangular lattice is investigated. Thermal fluctuations are…

Superconductivity · Physics 2025-12-10 A. G. Groshev , A. K. Arzhnikov

Temperature fluctuations over long time scales ($\gtrsim 1\,\mathrm{h}$) are an insidious problem for precision measurements. In optical laboratories, the primary effect of temperature fluctuations is drifts in optical circuits over spatial…

Instrumentation and Detectors · Physics 2024-04-11 Dylan Fife , Dong-Chel Shin , Vivishek Sudhir

Thermal frequency fluctuations in optical cavities limit the sensitivity of precision experiments ranging from gravitational wave observatories to optical atomic clocks. Conventional modeling of these noises assumes a linear response of the…

We calculate the thermal noise in half-infinite mirrors containing a layer of arbitrary thickness and depth made of excessively lossy material but with the same elastic material properties as the substrate. For the special case of a thin…

General Relativity and Quantum Cosmology · Physics 2014-11-17 N. Nakagawa , A. M. Gretarsson , E. K. Gustafson , M. M. Fejer

We explore how thermal fluctuations affect the mechanics of thin amorphous spherical shells. In flat membranes with a shear modulus, thermal fluctuations increase the bending rigidity and reduce the in-plane elastic moduli in a…

Soft Condensed Matter · Physics 2017-01-18 Andrej Kosmrlj , David R. Nelson

In this paper, we have for the first time considered the consequences of thermal fluctuations to the Casimir effect on a traversable wormhole. This was done by using finite temperature generalization of the Casimir effect as a source of a…

General Relativity and Quantum Cosmology · Physics 2025-02-07 Remo Garattini , Mir Faizal
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