Experimental single qubit quantum secret sharing

Phys Rev Lett. 2005 Dec 2;95(23):230505. doi: 10.1103/PhysRevLett.95.230505. Epub 2005 Dec 1.

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.