Simply quantum information processing with rf superconducting qubit

Utilizing rf superconducting quantum interference devices (SQUIDs) coupled with transmission line resonator (TLR), we propose a scheme to implementing quantum information processing. In this system, the high fidelity two-qubit maximally entangled states and quantum logic gate are realized. Under the large detuning condition, the excited state of rf SQUID is adiabatically eliminated. So the excited state spontaneous emission of the superconducting qubit can be effectively avoided in this paper. At last, the experimental feasibility and the challenge of our schemes have been discussed.