Experimental quantum secret sharing

✍ Scribed by Ch. Schmid; P. Trojek; S. Gaertner; M. Bourennane; Ch. Kurtsiefer; M. Zukowski; H. Weinfurter

• Book ID: 105357573
• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 176 KB
• Volume: 54
• Category: Article
• ISSN: 0015-8208
• DOI: 10.1002/prop.200610320

✦ Synopsis

Abstract

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 |Π~4~^‐^〉. As no interferometric setups are required here, contrary to known schemes, involving Greenberger‐Horne‐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.