Cycling Tames Power Fluctuations near Optimum Efficiency

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10385539" target="_blank" >RIV/00216208:11320/18:10385539 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1103/PhysRevLett.121.120601" target="_blank" >https://doi.org/10.1103/PhysRevLett.121.120601</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevLett.121.120601" target="_blank" >10.1103/PhysRevLett.121.120601</a>

Result language

angličtina

Original language name

Cycling Tames Power Fluctuations near Optimum Efficiency

Original language description

According to the laws of thermodynamics, no heat engine can beat the efficiency of a Carrot cycle. This efficiency traditionally comes with vanishing power output and practical designs, optimized for power, generally achieve far less. Recently, various strategies to obtain Carrot&apos;s efficiency at large power were proposed. However, a thermodynamic uncertainty relation implies that steady-state heat engines can operate in this regime only at the cost of large fluctuations that render them immensely unreliable. Here, we demonstrate that this unfortunate trade-off can be overcome by designs operating cyclically under quasistatic conditions. The experimentally relevant yet exactly solvable model of an overdamped Brownian heat engine is used to illustrate the formal result. Our study highlights that work in cyclic heat engines and that in quasistatic ones are different stochastic processes.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10300 - Physical sciences

Project

<a href="/en/project/GA17-06716S" target="_blank" >GA17-06716S: Stochastic thermodynamics of molecular systems: from classical to quantum</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physical Review Letters

ISSN

0031-9007

e-ISSN

—

Volume of the periodical

121

Issue of the periodical within the volume

12

Country of publishing house

US - UNITED STATES

Number of pages

5

Pages from-to

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UT code for WoS article

000444780900003

EID of the result in the Scopus database

2-s2.0-85053611524