Fast and high-fidelity generation of photonic Greenberger-Horne-Zeilinger states in circuit QED

Jingwei Chen,Guan-Hao Feng,Hong-Hao Zhang,L F Wei

Figure 1. (a) Energy level schematic of V-type qutrits. The transition between states $| g\rangle $ and $| e\rangle $ is used to generate photons in the relevant cavity, and the transition between states $| g\rangle $ and $| a\rangle $ is used to coupled with the other qutrit. (b) A general process to generate GHZ states with three qutrits.