Results 91 to 100 of about 106,692 (280)
Can quantum regression theorem be reconciled with quantum fluctuation dissipation theorem ?
, 2002 In the attempt to derive the regression theorem from the fluctuation dissipation theorem several authors claim the violation of the former theorem in the quantum case.
Gruzinskis, V. +3 more
core +1 more source
Advanced Materials Technologies, EarlyView.The study considers the use of polymer/dielectric‐based multilayers piezoelectric Energy Harvesters (EH) to produce an output voltage and current, by exploiting the mechanical energy provided by human organs movements. In particular, the heart motion is considered from the kinematic viewpoint, and a multiphysics theoretical model is developed to assess
Hamdi Ezzin +5 more
wiley +1 more source
Generalized Fluctuation-Dissipation Theorem for Non-equilibrium Spatially Extended Systems
Frontiers in Physics, 2020 The fluctuation-dissipation theorem (FDT) connecting the response of the system to external perturbations with the fluctuations at thermodynamic equilibrium is a central result in statistical physics. There has been effort devoted to extending the FDT in
Wei Wu, Jin Wang
doaj +1 more source
Fluctuation relations for heat engines in time-periodic steady states
, 2012 A fluctuation relation for heat engines (FRHE) has been derived recently. In the beginning, the system is in contact with the cooler bath. The system is then coupled to the hotter bath and external parameters are changed cyclically, eventually bringing ...
A M Jayannavar +9 more
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Isobaric–isothermal fluctuation theorem [PDF]
The Journal of Chemical Physics, 2002 The fluctuation theorem (FT) gives an analytical expression for the probability that in a finite nonequilibrium system observed for a finite time, the Second Law of Thermodynamics is violated. Since FT deals with fluctuations, the precise form of the theorem is dependent on the particular statistical mechanical ensemble.
Mittag, Emil +2 more
openaire +3 more sources
Probing Near‐Field EM Fluctuations in Superparamagnetic CoFeB With NV Quantum Dephasometry
Advanced Optical Materials, EarlyView.We non‐invasively investigate the superparamagnetic spin dynamics of a 1.1 nm CoFeB layer by probing its near‐field EM fluctuations using NV centers‐based quantum dephasometry. Our findings are further supported by theoretical modeling and SQUID‐based magnetization characterization. These results provide critical insight into the magnetization dynamics
Shoaib Mahmud +5 more
wiley +1 more source
Experiments in Stochastic Thermodynamics: Short History and Perspectives
Physical Review X, 2017 We summarize in this article the experiments which have been performed to test the theoretical findings in stochastic thermodynamics such as fluctuation theorem, Jarzynski equality, stochastic entropy, out-of-equilibrium fluctuation dissipation theorem ...
S. Ciliberto
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Fluctuation theorems for multitime processes
Physical Review A, 2022 14 pages, 2 ...
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Continuum Mechanics Modeling of Flexible Spring Joints in Surgical Robots
Advanced Robotics Research, EarlyView.A new mechanical model of a tendon‐actuated helical extension spring joint in surgical robots is built using Cosserat rod theory. The model can implicitly handle the unknown contacts between adjacent coils and numerically predict spring shapes from straight to significantly bent under actuation forces.
Botian Sun +3 more
wiley +1 more source
Results in OpticsIn this paper we revisit the classical fluctuation–dissipation theorem with derivations and interpretations based on quantum electrodynamics (QED).
Sven Nordebo
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