Non-Markovian Feedback Control and Acausality: An Experimental Study

Autor(en)

Maxime Debiossac, Martin Luc Rosinberg, Eric Lutz, Nikolai Kiesel

Abstrakt

Causality is an important assumption underlying nonequilibrium generalizations of the second law of thermodynamics known as fluctuation relations. We here experimentally study the nonequilibrium statistical properties of the work and of the entropy production for an optically trapped, underdamped nanoparticle continuously subjected to a time-delayed feedback control. Whereas the non-Markovian feedback depends on the past position of the particle for a forward trajectory, it depends on its future position for a time-reversed path, and is therefore acausal. In the steady-state regime, we show that the corresponding fluctuation relations in the long-time limit exhibit a clear signature of this acausality, even though the time-reversed dynamics is not physically realizable.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

Icm & Sorbonne University, Universität Stuttgart

Journal

Physical Review Letters

Band

128

Anzahl der Seiten

6

ISSN

0031-9007

DOI

https://doi.org/10.1103/PhysRevLett.128.200601

Publikationsdatum

01-2022

Peer-reviewed

Ja

ÖFOS 2012

103029 Statistische Physik

Schlagwörter

ASJC Scopus Sachgebiete

Allgemeine Physik und Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/10328468-6f31-437a-8b73-b2234827c484