We propose a method of realizing a three-qubit quantum gate with a superconducting quantum interference device（SQUID） in a cavity.In this proposal,the gate operation involves the SQUID ground-states and the Fock sta...We propose a method of realizing a three-qubit quantum gate with a superconducting quantum interference device（SQUID） in a cavity.In this proposal,the gate operation involves the SQUID ground-states and the Fock states of cavity modes b and c.The two field-modes act as the controlling qubits,and the two SQUID states form the target qubit.Since only the metastable lower levels are involved in the gate operation,the gate is not affected by the SQUID decay rates.展开更多
基金Project supported by the National Natural Science Foundation of China (Grant No. 60978009)the Major Research Plan of the National Natural Science Foundation of China (Grant No. 91121023)the National Basic Research Program of China (Grant No. 2011CBA00200)
文摘We propose a method of realizing a three-qubit quantum gate with a superconducting quantum interference device（SQUID） in a cavity.In this proposal,the gate operation involves the SQUID ground-states and the Fock states of cavity modes b and c.The two field-modes act as the controlling qubits,and the two SQUID states form the target qubit.Since only the metastable lower levels are involved in the gate operation,the gate is not affected by the SQUID decay rates.
