Abstract: The present application discloses a method and apparatus for evaluating a quantum gate in a superconducting circuit, a device and a storage medium, which relate to the field of quantum computations. The specific scheme may include: acquiring a Hamiltonian corresponding to a superconducting circuit structure, wherein the superconducting circuit structure may include computation qubits and a coupler disposed between two of the computation qubits and coupled with the two of the computation qubits respectively; performing decoupling processing for the coupler on the Hamiltonian to obtain the processed Hamiltonian representing a coupling strength between the computation qubits; and obtaining, based on the processed Hamiltonian, a first data processing rule that takes circuit parameters of the superconducting circuit structure as input parameters, wherein a degree of a difference between a target quantum gate and a theoretical quantum gate can be obtained based on the first data processing rule.

Abstract: The present disclosure discloses a high-fidelity superconducting circuit structure, a superconducting quantum chip, and a superconducting quantum computer, which relate to the field of quantum computation. The specific implementation is as follows: 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.

Abstract: A superconducting circuit structure, a superconducting quantum chip, and a superconducting quantum computer are provided, which are related to a field of quantum computing. The specific implementation includes: a superconducting circuit structure, including: at least three computational qubits; a bus qubit connected to the respective computational qubits, wherein couplings between two of the computational qubits connected by the bus qubit are equivalent; and coupler qubits disposed between the respective computational qubits and the bus qubit, to connect the respective computational qubits to the bus qubits, wherein the coupler qubit is configured to regulate coupling strength between the computational qubit and the bus qubit. Couplings between any two computational qubits may be realized, so that an operation of a quantum gate between any two computational qubits is achieved, while crosstalk between computational qubits may be effectively suppressed.

Abstract: A superconducting circuit structure, a superconducting quantum chip, and a superconducting quantum computer are provided, which relate to the field of quantum computing. The superconducting circuit structure includes: at least two qubits; a connector, coupled with the two qubits respectively, to realize transversal coupling with each of the two qubits; and a coupler, coupled with the two qubits respectively, to realize longitudinal coupling with each of the two qubits. Therefore, the ?z?z parasitic coupling between the qubits is effectively removed, and a two-qubit gate with high fidelity is obtained.