Experimental schematic illustration for dissipative preparation of entangled steady state between two transmission line microwave resonators coupled through hopping of microwave photons with a hopping rate J in circuit QED. κ, γ, and
γ
ϕ
are single-photon decay rate, superconducting qutrit spontaneous emission rate, and superconducting qutrit dephasing rate. Each resonator contains a single Λ-type superconducting qutrit which possesses two ground states
|
g
〉
and
|
f
〉
and one excited state
|
e
〉
. The qutrit transition
|
f
〉
↔
|
e
〉
is resonantly coupled to the resonator with the coupling constant g, and the transitions
|
g
〉
↔
|
e
〉
and
|
g
〉
↔
|
f
〉
are driven by two microwave fields with Rabi frequencies
Ω
1
and
Ω
2
, respectively.
|