Verifying genuine multipartite entanglement of the whole from its separable parts

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F19%3A73594754" target="_blank" >RIV/61989592:15310/19:73594754 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.osapublishing.org/optica/fulltext.cfm?uri=optica-6-7-896&id=415360" target="_blank" >https://www.osapublishing.org/optica/fulltext.cfm?uri=optica-6-7-896&id=415360</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1364/OPTICA.6.000896" target="_blank" >10.1364/OPTICA.6.000896</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Verifying genuine multipartite entanglement of the whole from its separable parts

Popis výsledku v původním jazyce

Ascertaining the large-scale properties of the whole from the properties of its parts is a highly relevant problem in many branches of physics. Here, we investigate a special variant of this task when the parts carry no signs of the global properties in the context of quantum correlation properties in a multipartite optical system. Specifically, we prove experimentally the predicted existence of a three-qubit quantum state with genuine multipartite entanglement (GME) that can be certified solely from its separable two-qubit reduced density matrices. The qubits are encoded into different degrees of freedom of a pair of correlated photons, and the state is prepared by letting the photons propagate through a linear optical circuit. The presence of GME is verified by finding numerically a fully decomposable entanglement witness acting nontrivially only on the reductions of the global state. Our result confirms the viability of detection of emerging global properties of composite quantum systems from the parts that lack the properties.

Název v anglickém jazyce

Verifying genuine multipartite entanglement of the whole from its separable parts

Popis výsledku anglicky

Ascertaining the large-scale properties of the whole from the properties of its parts is a highly relevant problem in many branches of physics. Here, we investigate a special variant of this task when the parts carry no signs of the global properties in the context of quantum correlation properties in a multipartite optical system. Specifically, we prove experimentally the predicted existence of a three-qubit quantum state with genuine multipartite entanglement (GME) that can be certified solely from its separable two-qubit reduced density matrices. The qubits are encoded into different degrees of freedom of a pair of correlated photons, and the state is prepared by letting the photons propagate through a linear optical circuit. The presence of GME is verified by finding numerically a fully decomposable entanglement witness acting nontrivially only on the reductions of the global state. Our result confirms the viability of detection of emerging global properties of composite quantum systems from the parts that lack the properties.

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

<a href="/cs/project/GA16-17314S" target="_blank" >GA16-17314S: Komplexní multiqubitová optická kvantová logická hradla</a><br>

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

Optica

ISSN

2334-2536

e-ISSN

—

Svazek periodika

6

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

896-901

Kód UT WoS článku

000476637300011

EID výsledku v databázi Scopus

2-s2.0-85071191232