A simple scheme to generate χ-type four-charge entangled states in circuit QED
Guilong Gao, Fuquan Song, Shou-Sheng Huang, Hui Wang, Yuan Xian-Zhang, Mingfeng Wang, Nian-Quan Jiang · Chinese Physics B · 2012
We propose a simple scheme to generate χ-type four-charge entangled states by using SQUID-based charge qubits capacitively coupled to a transmission line resonator (TLR). The coupling between the superconducting qubit and the TLR can be effectively controlled by properly adjusting the control parameters of the charge qubit. The experimental feasibility of our scheme is also shown.