Measurement Induced Synthesis of Coherent Quantum Batteries

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F19%3A73597215" target="_blank" >RIV/61989592:15310/19:73597215 - isvavai.cz</a>
Result on the web
<a href="https://www.nature.com/articles/s41598-019-56158-8.pdf" target="_blank" >https://www.nature.com/articles/s41598-019-56158-8.pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s41598-019-56158-8" target="_blank" >10.1038/s41598-019-56158-8</a>

Result language
angličtina
Original language name
Measurement Induced Synthesis of Coherent Quantum Batteries
Original language description
Quantum coherence represented by a superposition of energy eigenstates is, together with energy, an important resource for quantum technology and thermodynamics. energy and quantum coherence however, can be complementary. the increase of energy can reduce quantum coherence and vice versa. Recently, it was realized that steady-state quantum coherence could be autonomously harnessed from a cold environment. We propose a conditional synthesis of N independent two-level systems (tLS) with partial quantum coherence obtained from an environment to one coherent system using a measurement able to increase both energy and coherence simultaneously. the measurement process acts here as a Maxwell demon synthesizing the coherent energy of individual tLS to one large coherent quantum battery. the measurement process described by poVM elements is diagonal in energy representation and, therefore, it does not project on states with quantum coherence at all. We discuss various strategies and their efficiency to reach large coherent energy of the battery. After numerical optimization and proof-of-principle tests, it opens way to feasible repeat-until-success synthesis of coherent quantum batteries from steady-state autonomous coherence.
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
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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