“…On the other hand, superconducting quantum circuit, because of its advantages of tunability and flexibility, has received a lot of attention. [ 29–50 ] The system can be used in quantum information processing (QIP) such as implementing quantum gates, [ 31–33 ] preparing quantum states, [ 35,36,44 ] performing teleportation, [ 40 ] and working as quantum readout [ 37–39 ] or quantum error correction code. [ 43,44 ] Phonon blockade in the superconducting quantum circuit has also been widely investigated, [ 19,25,51–53 ] such as the phonon blockade based on the Jaynes–Cummings model, [ 19 ] nonlinear qubit‐phonon coupling [ 25 ] and quadratic coupling between qubit and nanomechanical resonator, [ 54 ] and multiphonon blockade in coupled nanomechanical resonators.…”