Work and information from thermal states after subtraction of energy quanta

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F17%3A73582151" target="_blank" >RIV/61989592:15310/17:73582151 - isvavai.cz</a>

Result on the web

<a href="https://www.nature.com/articles/s41598-017-13502-0" target="_blank" >https://www.nature.com/articles/s41598-017-13502-0</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41598-017-13502-0" target="_blank" >10.1038/s41598-017-13502-0</a>

Result language

angličtina

Original language name

Work and information from thermal states after subtraction of energy quanta

Original language description

Quantum oscillators prepared out of thermal equilibrium can be used to produce work and transmit information. By intensive cooling of a single oscillator, its thermal energy deterministically dissipates to a colder environment, and the oscillator substantially reduces its entropy. This out-of-equilibrium state allows us to obtain work and to carry information. Here, we propose and experimentally demonstrate an advanced approach, conditionally preparing more efficient out-of-equilibrium states only by a weak dissipation, an inefficient quantum measurement of the dissipated thermal energy, and subsequent triggering of that states. Although it conditionally subtracts the energy quanta from the oscillator, average energy grows, and second-order correlation function approaches unity as by coherent external driving. On the other hand, the Fano factor remains constant and the entropy of the subtracted state increases, which raise doubts about a possible application of this approach. To resolve it, we predict and experimentally verify that both available work and transmitted information can be conditionally higher in this case than by arbitrary cooling or adequate thermal heating up to the same average energy. It qualifies the conditional procedure as a useful source for experiments in quantum information and thermodynamics.

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

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

Name of the periodical

Scientific Reports

ISSN

2045-2322

e-ISSN

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Volume of the periodical

7

Issue of the periodical within the volume

OCT

Country of publishing house

GB - UNITED KINGDOM

Number of pages

9

Pages from-to

"13046-1"-"13046-9"

UT code for WoS article

000412950600037

EID of the result in the Scopus database

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