title: Experimental single qubit quantum secret sharing.
abstract: We present a simple and practical protocol for the solution of a secure multiparty communication task, the secret sharing, and its proof-of-principle experimental realization. In this protocol, a secret is split among several parties in a way that its reconstruction requires the collaboration of the participating parties. In our scheme the parties solve the problem by sequential transformations on a single qubit. In contrast with recently proposed schemes involving multiparticle Greenberger-Horne-Zeilinger states, the approach demonstrated here is much easier to realize and scalable in practical applications.
authors.affiliation: Sektion Physik, Ludwig-Maximilians-Universität, D-80797 München, Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Schmid
authors.forename: Pavel
authors.initials: P
authors.lastname: Trojek
authors.forename: Mohamed
authors.initials: M
authors.lastname: Bourennane
authors.forename: Christian
authors.initials: C
authors.lastname: Kurtsiefer
authors.forename: Marek
authors.initials: M
authors.lastname: Zukowski
authors.forename: Harald
authors.initials: H
authors.lastname: Weinfurter