Faculty @ Indian Institute of Science Education and Research (IISER) Pune
Wednesday June 29 – 9.15 BST
Universal bounds on fluctuations in thermal machines and its connection to thermodynamic uncertainty relation
Trade-off relations involving the relative uncertainty of currents and the associated entropy production have been of enormous interest for the past few years in the field of non-equilibrium stochastic thermodynamics. It is now realized, for example, that the optimization of heat engines should balance power, efficiency as well as power fluctuations. In this talk, I will talk about multi-affinity-driven continuous thermal machines and show that the relative fluctuations of individual currents for thermal machines are not independent but follow strict bounds, giving rise to a new universal bound for the mean efficiency of thermal machines and is tighter than the well known Carnot bound as predicted by macroscopic thermodynamics. I will also talk about the extension of this bound for time-reversal symmetry-breaking systems.
1. Universal bounds on fluctuations in continuous thermal machines, S. Saryal et al Phys. Rev. Lett, 127, 190603 (2021).
2. Bounds on fluctuations for finite-time quantum Otto cycle, S. Saryal and Bijay Agarwalla, Phys. Rev. E. Lett 103 L060103 (2021).
3. Universal bounds on fluctuations for machines with broken time-reversal symmetry, Accepted in Phys. Rev. E, arxiv: 2110.05297
S. Saryal, S. Mohanta, and Bijay Kumar Agarwalla
4. Universal bounds on fluctuations for machines with broken time-reversal symmetry, S. Saryal, S. Mohanta, and Bijay Agarwalla, arXiv: 2110.05297.