Acord intrinsec multipartit non-localitate și pentru conferință independent de dispozitiv

Acord intrinsec multipartit non-localitate și pentru conferință independent de dispozitiv

Marca temporală: 19 ianuarie 2023 6:41
Multipartite Intrinsic Non-Locality and Device-Independent Conference Key Agreement PlatoBlockchain Data Intelligence. Vertical Search. Ai.

Aby Philip1,5, Eneet Kaur2,4, Peter Bierhorst3și Mark M. Wilde1,6

1Institutul Hearne pentru Fizică Teoretică, Departamentul de Fizică și Astronomie și Centrul pentru Calcul și Tehnologie, Universitatea de Stat din Louisiana, Baton Rouge, Louisiana 70803, SUA
2Institutul de calcul cuantic și Departamentul de Fizică și Astronomie, Universitatea din Waterloo, Waterloo, Ontario N2L 3G1, Canada
3Departamentul de Matematică, Universitatea din New Orleans, Louisiana 70148, SUA
4Colegiul Wyant de Științe Optice, Universitatea din Arizona, Tucson, Arizona 85721, SUA
5Școala de Fizică Aplicată și Inginerie, Universitatea Cornell, Ithaca, New York 14850, SUA
6Școala de Inginerie Electrică și Calculatoare, Universitatea Cornell, Ithaca, New York 14850, SUA

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Abstract

În această lucrare, introducem non-localitatea intrinsecă multipartită ca metodă de cuantificare a resurselor în scenariul multipartit al acordului cheie de conferință independent de dispozitiv (DI). Demonstrăm că non-localitatea intrinsecă multipartită este aditivă, convexă și monotonă în cadrul unei clase de operații libere numite operații locale și aleatorie comună. Ca una dintre contribuțiile noastre tehnice, stabilim o regulă de lanț pentru două variante de informații reciproce multipartite, pe care apoi le folosim pentru a demonstra că non-localitatea intrinsecă multipartită este aditivă. Această regulă de lanț poate fi de interes independent în alte contexte. Toate aceste proprietăți ale non-localității intrinseci multipartite sunt utile în stabilirea principalului rezultat al lucrării noastre: non-localitatea intrinsecă multipartită este o limită superioară a ratei cheii secrete în scenariul general multipartit al acordului de cheie a conferinței DI. Discutăm diverse exemple de protocoale cheie de conferință DI și comparăm limitele superioare ale acestor protocoale cu limitele inferioare cunoscute. În cele din urmă, calculăm limitele superioare ale realizărilor experimentale recente ale distribuției cheilor cuantice DI.

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Citat de

[1] Karol Horodecki, Marek Winczewski, and Siddhartha Das, “Fundamental limitations on the device-independent quantum conference key agreement”, Revista fizică A 105 2, 022604 (2022).

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