A scheme for two-photon lasing with two coupled flux qubits in circuit quantum electrodynamics<xref ref-type="fn" rid="cpb142316fn1">*</xref>

A scheme for two-photon lasing with two coupled flux qubits in circuit quantum electrodynamics*

Huang Wen^a),^b), Zou Xu-Bo^a),^b)†, Guo Guang-Can^a),^b)

(a) The common logarithm of spectrum of the resonator output field intensity, (b) the spectrum of the resonator output field intensity in the vicinity of ω − ω _a = 0. The parameters are κ = 0.08 g , γ = 0.05 g , δ = 0, J = 3.8 (2 π GHz) and p = 0.2 g (blue solid lines), p = 0.5 g (dark dot–dashed lines), p = 0.8 g (red dashed lines).