Universal, Unambiguous Concentration and Distillation of Bell pairs

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F25%3A00387032" target="_blank" >RIV/68407700:21340/25:00387032 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/rcx1-w6j7" target="_blank" >https://doi.org/10.1103/rcx1-w6j7</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/rcx1-w6j7" target="_blank" >10.1103/rcx1-w6j7</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Universal, Unambiguous Concentration and Distillation of Bell pairs

Popis výsledku v původním jazyce

The ability of preparing perfect Bell pairs with a practical scheme is of great relevance for quantum communication as well as distributed quantum computing. We propose a scheme which probabilistically, but universally and unambiguously produces the jΦþi Bell pair from four copies of qubit pairs initially in the same unknown pure quantum state. The same scheme, extended to eight qubit pairs initially in the same, moderately mixed quantum state, unambiguously produces the jΦþi Bell pair with quadratically suppressed noise. The core step of the proposed scheme consists of a pair of local two-qubit operations applied at each of the two distant locations, followed by a partial projective measurement and postselection at each party, with results communicated classically. While the scheme resembles standard entanglement distillation protocols, it achieves success within just three iterations, making it attractive for real-world applications.

Název v anglickém jazyce

Universal, Unambiguous Concentration and Distillation of Bell pairs

Popis výsledku anglicky

The ability of preparing perfect Bell pairs with a practical scheme is of great relevance for quantum communication as well as distributed quantum computing. We propose a scheme which probabilistically, but universally and unambiguously produces the jΦþi Bell pair from four copies of qubit pairs initially in the same unknown pure quantum state. The same scheme, extended to eight qubit pairs initially in the same, moderately mixed quantum state, unambiguously produces the jΦþi Bell pair with quadratically suppressed noise. The core step of the proposed scheme consists of a pair of local two-qubit operations applied at each of the two distant locations, followed by a partial projective measurement and postselection at each party, with results communicated classically. While the scheme resembles standard entanglement distillation protocols, it achieves success within just three iterations, making it attractive for real-world applications.

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/GA23-07169S" target="_blank" >GA23-07169S: Vícečásticová kvantová dynamika na grafech a hypergrafech – teorie a aplikace</a><br>

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

PHYSICAL REVIEW LETTERS

ISSN

0031-9007

e-ISSN

1079-7114

Svazek periodika

135

Číslo periodika v rámci svazku

26

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

"260202-1"-"260202-6"

Kód UT WoS článku

001651967200007

EID výsledku v databázi Scopus

2-s2.0-105026654392