Experimental Quantum Coin Tossing

Details Experimental Quantum Coin Tossing Experimental Quantum Coin Tossing

2004-04-05

arxiv.org/abs/quant-ph/0404027v1

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevLett.94.040501

In this letter we present the first implementation of a quantum coin tossing protocol. This protocol belongs to a class of ``two-party'' cryptographic problems, where the communication partners distrust each other. As with a number of such two-party protocols, the best implementation of the quantum coin tossing requires qutrits. In this way, we have also performed the first complete quantum communication protocol with qutrits. In our experiment the two partners succeeded to remotely toss a row of coins using photons entangled in the orbital angular momentum. We also show the experimental bounds of a possible cheater and the ways of detecting him.

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