Secure quantum dense coding via tripartite entangled GHZ state in cavity QED

摘要

We investigate economic protocol to securely encoding classical informationamong three users via entangled GHZ states. We implement the scheme in cavityQED with atomic qubits where the atoms interact simultaneously with a highlydetuned cavity mode with the assistance of a classical field. The scheme isinsensitive to the cavity decay and the thermal field, thus based on cavity QEDtechniques presently it might be realizable.