QUANTUM SECRET SHARING IN DRIVEN CAVITY QED
Chuan-Jia Shan, Zhong‐Xiao Man, Yun‐Jie Xia, Tang-Kun Liu · International Journal of Quantum Information · 2007
We propose a protocol for implementing quantum secret sharing via EPR states in driven cavity QED. Both of the two receivers can read out the sender's secret if they cooperate. The protocol does not require the joint Bell-state measurement needed in the previous schemes. In the protocol the cavity is only virtually excited and thus the requirement on the quality factor of the cavity is greatly loosened.