  We propose a scheme of using two fixed frequency resonator couplers to tune
the coupling strength between two Xmon qubits. The induced indirect qubit-qubit
interactions by two resonators could offset with each other, and the direct
coupling between two qubits are not necessarily for switching off. The small
direct qubit-quibt coupling could effectively suppress the frequency interval
between switching off and switching on, and globally suppress the second and
third-order static ZZ couplings. The frequencies differences between resonator
couplers and qubits readout resonators are very large, this might be helpful
for suppressing the qubits readout errors. The cross-kerr resonant processes
between a qubit and two resonators might induce pole and affect the crosstalks
between qubits. The double resonator couplers could unfreeze the restrictions
on capacitances and coupling strengths in the superconducting circuit, and it
can also reduce the flux noises and globally suppress the crosstalks.
