On Wednesday 15.08.2018, we will have  Jesus J. del Pozo from the Department of Nuclear, Atomic and Molecular Physic, University Granada, Spain as our guest.

He will present a SFB-seminar at the PTB, Einstein-Bau, seminar room, at 10:00 o'clock.

Non-equilibrium phenomena of a hard disk system under a temperature gradient and the Trapsensor lab: towards a quantum mass sensor.

 The study of stationary states and fluctuations of non-equilibrium systems using concepts and methods from large deviation theory has become an active topic in statistical mechanics. However, calculations in this framework can be very difficult to perform. On the first part of the talk we present theoretical and computational results that support a mesoscopic approach to these phenomena following the Macroscopic Fluctuation Theory introduced by Bertini et al [1]. We focus on the role of Local Equilibrium as a driving hypothesis and on its limits of applicability. This allow us to disentangle spurious boundary effects from the finite size behavior of a hard disk system under a temperature gradient, study long range correlations in this system and explore the role of symmetry on the current's fluctuations and its implications for the fluctuating optimal profiles.
On the second part of the talk I will give a survey of the current projects developed at the Trapsensor laboratory aiming at high precision mass measurements of heavy elements.

[1] Bertini, L., et al. "Macroscopic fluctuation theory." Reviews of Modern Physics 87.2 (2015): 593.

Guests are welcome!