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Adiabatic Processes Realized with a Trapped Brownian Particle

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Martínez, Ignacio A. and Roldán Estébanez, Édgar and Dinis Vizcaíno, Luis Ignacio and Petrov, Dimitri and Rica, Raúl A. (2015) Adiabatic Processes Realized with a Trapped Brownian Particle. Physical Review Letters, 114 (12). ISSN 0031-9007

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Official URL: http://dx.doi.org/10.1103/PhysRevLett.114.120601


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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.


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Additional Information:

© 2015 American Physical Society. We acknowledge theoretical discussions with J. M. R. Parrondo. I. A. M., E. R., D. P., and R. A. R. acknowledge financial support from the Fundació Privada Cellex Barcelona, Generalitat de Catalunya Grant No. 2009-SGR-159, and from grant NANOMQ (MINECO FIS2011-24409). E. R. and L. D. acknowledge financial support from grant ENFASIS (MINECO FIS2011-22644). I. A. M. acknowledges financial support from the European Research Council Grant OUTEFLUCOP. The initial ideas of this work were conceived by Professor D. Petrov, leader of the Optical Tweezers group at ICFO, who has sincepassed away.

Uncontrolled Keywords:Small systems; Fluctuation theorem; Steady-state; Thermodynamics; Force; Information; Equality; Engine
Subjects:Sciences > Physics > Nuclear physics
ID Code:30487
Deposited On:01 Jun 2015 10:42
Last Modified:10 Dec 2018 14:57

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