OUTPUT ENTANGLEMENT IN A FOUR-LEVEL CORRELATED EMISSION LASER
Yunxia Ping, Chaomin Zhang, MINGXIA WANG, Shan Wang · International Journal of Quantum Information · 2013
The continuous-variable (CV) entanglement of the output fields is investigated in a four-level correlated emission laser system. The atomic coherence is introduced using two external classical driving fields. Based on the input–output theory, it is shown that the output entanglement and the entangled photons of the system can be achievable under certain conditions. Moreover, it is found that the two-mode entanglement has a close relation with the intensities of two external driving fields.