Qubit-environment entanglement in time-dependent pure dephasing

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F24%3A73624584" target="_blank" >RIV/61989592:15310/24:73624584 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/24:00585721 RIV/00216208:11320/24:10483746

Výsledek na webu

<a href="https://journals.aps.org/pra/pdf/10.1103/PhysRevA.109.032412" target="_blank" >https://journals.aps.org/pra/pdf/10.1103/PhysRevA.109.032412</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevA.109.032412" target="_blank" >10.1103/PhysRevA.109.032412</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Qubit-environment entanglement in time-dependent pure dephasing

Popis výsledku v původním jazyce

We show that the methods for quantification of system-environment entanglement that were recently developed for interactions that lead to pure decoherence of the system can be straightforwardly generalized to time-dependent Hamiltonians of the same type. This includes the if-and-only-if criteria of separability, as well as the entanglement measure applicable to qubit systems, and methods of detection of entanglement by operations and measurements performed solely on the system without accessing the environment. We use these methods to study the nature of the decoherence of a qubit-oscillator system. Qubit-oscillator entanglement is essential for developing bosonic quantum technology with quantum non-Gaussian states and its applications in quantum sensing and computing. The dominating bosonic platforms—trapped ions, electromechanics, and superconducting circuits—are based on the time-dependent gates that use such entanglement to achieve new quantum sensors and quantum error correction. The steplike time dependence of the Hamiltonian that is taken into account allows us to capture the complex interplay between the buildups of classical and quantum correlations, which could not be replicated in time-independent scenarios.

Název v anglickém jazyce

Qubit-environment entanglement in time-dependent pure dephasing

Popis výsledku anglicky

We show that the methods for quantification of system-environment entanglement that were recently developed for interactions that lead to pure decoherence of the system can be straightforwardly generalized to time-dependent Hamiltonians of the same type. This includes the if-and-only-if criteria of separability, as well as the entanglement measure applicable to qubit systems, and methods of detection of entanglement by operations and measurements performed solely on the system without accessing the environment. We use these methods to study the nature of the decoherence of a qubit-oscillator system. Qubit-oscillator entanglement is essential for developing bosonic quantum technology with quantum non-Gaussian states and its applications in quantum sensing and computing. The dominating bosonic platforms—trapped ions, electromechanics, and superconducting circuits—are based on the time-dependent gates that use such entanglement to achieve new quantum sensors and quantum error correction. The steplike time dependence of the Hamiltonian that is taken into account allows us to capture the complex interplay between the buildups of classical and quantum correlations, which could not be replicated in time-independent scenarios.

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

2024

Kód důvěrnosti údajů

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

Název periodika

PHYSICAL REVIEW A

ISSN

2469-9926

e-ISSN

2469-9934

Svazek periodika

109

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

"032412-1"-"032412-8"

Kód UT WoS článku

001198610700005

EID výsledku v databázi Scopus

2-s2.0-85187544421