Theoretical Physics Colloquium
Stochastic thermodynamics of a pair of magnetic colloids, estimation of dissipation and feedback control
by Dr. Anupam Kundu (LPTMS, Paris)
Tuesday, September 23, 2014
from
to
(Asia/Kolkata)
at AG69
at AG69
Description |
Non-equilibrium effects are naturally manifest in systems at small length scales. Thermal fluctuations can lead to observable and significant deviations from the s average behaviour. As a result, such systems are not well described by classical thermodynamics and one needs to extend the ideas of thermodynamics appropriately. An attempt is made by identifying heat, work and entropy consistently at the microscopic level. A few general results related to the time reversal symmetry of distribution functions, known as the fluctuation relations, have been obtained in this context. In this talk, I will discuss the stochastic thermodynamics of a paradigmatic model small system verifying the fluctuation relation for this case. In the next part of my talk I will discuss a non-invasive method of estimating the energy dissipation of this stochastic system. Finally, I will discuss possible modifications of the fluctuation relations in the presence of feedback control. These methods have potential applications in improving the performance of all-scale engines. |