Secure Quantum Dialogue via Cavity QED
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In this paper, a secure quantum dialogue protocol via cavity QED is suggested by using the evolution law of atom in cavity QED. The present protocol employs both the two-step transmission and the unitary operation encoding. Two security checks are adopted to ensure its transmission security against the active attacks from an outside eavesdropper. The present protocol avoids the information leakage problem by using the entanglement swapping between any two Bell states via cavity QED together with the shared secret Bell state. Compared with the previous information leakage resistant quantum dialogue protocol via cavity QED, the present protocol takes advantage in quantum measurement.
KeywordsQuantum dialogue Information leakage Cavity QED Entanglement swapping Quantum measurement
Funding by the National Natural Science Foundation of China (Grant No.11375152), and the Natural Science Foundation of Zhejiang Province (Grant No. LQ12F02012) is gratefully acknowledged.