High-fidelity superconducting circuit structure, superconducting quantum chip, and superconducting quantum computer

A superconducting circuit structure, comprising:

• computation qubits;
• a coupling device configured to be coupled with two computation qubits, respectively;
• a connecting component disposed between a computation qubit and the coupling device to couple the computation qubit with the coupling device, so as to implement a target quantum gate based on the coupling device and the computation qubit,
• wherein the computation qubit and the coupling device have different anharmonicities, and a superconducting circuit parameter in the superconducting circuit structure is adjusted to cause a quantum state outside a computation space corresponding to the superconducting circuit structure to counteract an energy level shift caused by a quantum state inside the computation space,
• wherein the superconducting circuit structure satisfies following conditions:
• dispersive coupling is performed between the coupling device and the computation qubit;
• anharmonicity of the computation qubit is a negative value and anharmonicity of the coupling device is a positive value, and a frequency of the coupling device is less than that of the computation qubit in the superconducting circuit structure.