Measurement Induced Synthesis of Coherent Quantum Batteries

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurement Induced Synthesis of Coherent Quantum Batteries

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Measurement Induced Synthesis of Coherent Quantum Batteries

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Scientific Reports

ISSN

2045-2322

e-ISSN

—

Svazek periodika

9

Číslo periodika v rámci svazku

DEC

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

"19628-1"-"19628-12"

Kód UT WoS článku

000508896900019

EID výsledku v databázi Scopus

2-s2.0-85077045419