Title:
|
Adiabatic Processes Realized with a Trapped Brownian Particle
|
Author:
|
Martínez, Ignacio A.; Roldán, Édgar; Dinis, Luis; Petrov, Dmitri; Rica, Raúl A.
|
Other authors:
|
Universitat Politècnica de Catalunya. Institut de Ciències Fotòniques |
Abstract:
|
The ability to implement adiabatic processes in the mesoscale is of key importance in the study of
artificial or biological micro- and nanoengines. Microadiabatic processes have been elusive to experimental
implementation due to the difficulty in isolating Brownian particles from their fluctuating environment.
Here we report on the experimental realization of a microscopic quasistatic adiabatic process employing a
trapped Brownian particle. We circumvent the complete isolation of the Brownian particle by designing
a protocol where both characteristic volume and temperature of the system are changed in such a way that
the entropy of the system is conserved along the process. We compare the protocols that follow from either
the overdamped or underdamped descriptions, demonstrating that the latter is mandatory in order to obtain
a vanishing average heat flux to the particle. We provide analytical expressions for the distributions of the
fluctuating heat and entropy and verify them experimentally. Our protocols could serve to implement the
first microscopic engine that is able to attain the fundamental limit for the efficiency set by Carnot. |
Subject(s):
|
-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telecomunicació òptica::Fotònica -Brownian motion processes -Brownian particles -Fotònica |
Rights:
|
|
Document type:
|
Article - Published version Article |
Published by:
|
APS Physics
|
Share:
|
|