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DY: Fachverband Dynamik und Statistische Physik

DY 6: Granular Physics 1 - organized by Matthias Sperl (Köln)

DY 6.2: Vortrag

Montag, 22. März 2021, 09:50–10:10, DYc

Uncertainty relations for mesoscopic coherent light — •Ohad Shpielberg — University of Haifa, Haifa, Israel

Thermodynamic uncertainty relations unveil useful connections between fluctuations in thermal systems and entropy production. This talk extends these ideas to the disparate field of zero temperature quantum mesoscopic physics where fluctuations are due to coherent effects and entropy production is replaced by a cost function defined using a novel disorder reversal operator. A simple expression is obtained for the average cost function, which depends on the dimensionless conductance g and on a geometrical factor B controlled by boundary conditions. Contrary to thermodynamic machines aimed at minimising fluctuations to increase precision, it is desirable in mesoscopic devices to increase coherent effects. The cost function indicates that increasing coherent effects can be achieved by playing with the geometry and boundary conditions through B and not only by decreasing the bulk conductance g.