Nonequilibrium quantum bounds to Landauer's principle: Tightness and effectiveness

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F17%3A73582139" target="_blank" >RIV/61989592:15310/17:73582139 - isvavai.cz</a>
Result on the web
<a href="https://journals.aps.org/pra/pdf/10.1103/PhysRevA.96.042109" target="_blank" >https://journals.aps.org/pra/pdf/10.1103/PhysRevA.96.042109</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevA.96.042109" target="_blank" >10.1103/PhysRevA.96.042109</a>

Result language
angličtina
Original language name
Nonequilibrium quantum bounds to Landauer's principle: Tightness and effectiveness
Original language description
We assess two different nonequilibrium quantum Landauer bounds: the traditional approach based on the change in entropy, referred to as the "entropic bound," and one based on the details of the dynamical map, referred to as the "thermodynamic bound." By first restricting to a simple exactly solvable model of a single two-level system coupled to a finite-dimensional thermal environment and by exploiting an excitation-preserving interaction, we establish the dominant role played by the population terms in dictating the tightness of these bounds with respect to the dissipated heat and clearly establish that coherences only affect the entropic bound. Furthermore, we show that sharp boundaries between the relative performance of the two quantities emerge and find that there are clear instances where both approaches return a bound weaker than Clausius' statement of the second law, rendering them ineffective. Finally, we show that our results extend to generic interaction terms.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10306 - Optics (including laser optics and quantum optics)

Project
<a href="/en/project/GB14-36681G" target="_blank" >GB14-36681G: Center of Excellence for Classical and Quantum Interactions in Nanoworld</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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