23 citations · 149 across the 19 of their papers we have counts for
19 papers
Rotational diffusion under torque: Microscopic reversibility and excess entropy
Swarnali Bandopadhyay, Debasish Chaudhuri, A. M. Jayannavar
We consider rotational diffusion for two systems - a macrospin under external magnetic field, and a particle diffusing on the surface of a sphere under external torque. Microstates…
Stochastic thermodynamics of macrospins with fluctuating amplitude and direction
Swarnali Bandopadhyay, Debasish Chaudhuri, A. M. Jayannavar
We consider stochastic energy balance and entropy production (EP) in a generalized Langevin dynamics of macrospins, allowing for both amplitude and direction fluctuations, under ex…
Macrospin in external magnetic field: Entropy production and fluctuation theorems
Swarnali Bandopadhyay, Debasish Chaudhuri, A. M. Jayannavar
We consider stochastic rotational dynamics of a macrospin at a constant temperature, in presence of an external magnetic field. Starting from the appropriate Langevin equation whic…
Feedback control of noise in spin valves by the spin-transfer torque
Swarnali Bandopadhyay, Arne Brataas, Gerrit E. W. Bauer
The miniaturisation of magnetic read heads and random access memory elements makes them vulnerable to thermal fluctuations. We demonstrate how current-induced spin-transfer torques…
Anderson orthogonality catastrophe in realistic quantum dots
Swarnali Bandopadhyay, Martina Hentschel
We study Anderson orthogonality catastrophe (AOC) for an parabolic quantum dot (PQD), one of the experimentally realizable few-electron systems. The finite number of electrons in P…
Renormalization of the dephasing by zero point fluctuations
Swarnali Bandopadhyay, Doron Cohen
We study the role of zero-point-fluctuations (ZPF) in dephasing at low temperature. Unlike the Caldeira-Leggett model where the interaction is with an homogeneous fluctuating field…