Experimental quantum secret sharing

Autor: Harald Weinfurter, Christian Kurtsiefer, Sascha Gaertner, Marek Zukowski, Christian Schmid, Mohamed Bourennane, Pavel Trojek
Rok vydání: 2006
Předmět:
Zdroj: Elements of Quantum Information
ISSN: 1521-3978
0015-8208
Popis: PACS 03.67.Hk, 03.67.Dd We consider two simple and practical protocols for multiparty communication and show their experimental realization. These protocols deal with the task of secret sharing in which a secret message is split among several parties in a way that its reconstruction requires their mutual collaboration. In the presented schemes the parties solve the problem by two different approaches: The first uses as a resource the multiqubit entangled state | Ψ − � . As no interferometric setups are required here, contrary to known schemes, involving GreenbergerHorne-Zeilinger states, its implementation is simpler and more stable. In the second scheme only sequential transformations on a single qubit are used. This further tremendously simplifies the method, makes it scalable with regard to the number of participating partners and above all, technologically comparable to quantum key distribution. c
Databáze: OpenAIRE
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