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Q: Quantenoptik

Q 223: Quantum Information II

Q 223.8: Talk

Tuesday, March 5, 2002, 18:15–18:30, HS 11/215

Hiding classical data in multi-partite quantum states — •Tilo Eggeling and Reinhard F. Werner — Institut für Mathematische Physik, TU Braunschweig

We present a technique for hiding classical bits in multipartite quantum states. A classical bit is encoded in the choice of one out of a pair of orthogonal quantum states, and cannot be read out by using only local communication and classical communication. We show that there is a rich variety of coding possiblilities differing in the kind of quantum information exchange required for decoding.