Method for Determining Fidelity of Qubit Gate in Quantum Chip, and Storage Medium

A method for determining fidelity of a qubit gate in a quantum chip, comprising:

• acquiring, by invoking a first interface, environmental qubit gates associated with a two-qubit gate in the quantum chip, wherein the first interface comprises a first parameter having a first parameter value corresponding to the two-qubit gate and the environmental qubit gates, wherein the two-qubit gate interacts with the environmental qubit gates in the quantum chip;
• determining a first target matrix and a corresponding first evolution matrix based on the two-qubit gate and the environmental qubit gates, wherein the first target matrix is a diagonal matrix represented based on a logic gate, and the first evolution matrix is a matrix obtained after time-dependent evolution;
• determining the fidelity of the two-qubit gate based on the number of the environmental qubit gates interacting with the two-qubit gate, the first target matrix, and the first evolution matrix;
• and
• outputting the fidelity of the two-qubit gate by invoking a second interface, wherein the second interface comprises a second parameter having a second parameter value representing the fidelity of the two-qubit gate.

A method for determining fidelity of a qubit gate in a quantum chip, comprising:

• acquiring, from a quantum platform, environmental qubit gates associated with a two-qubit gate in the quantum chip, wherein the two-qubit gate interacts with the environmental qubit gates in the quantum chip;
• determining a first target matrix and a corresponding first evolution matrix based on the two-qubit gate and the environmental qubit gates, wherein the first target matrix is a diagonal matrix represented based on a logic gate, and the first evolution matrix is a matrix obtained after time-dependent evolution;
• determining the fidelity of the two-qubit gate based on the number of the environmental qubit gates associated with the two-qubit gage, the first target matrix, and the first evolution matrix;
• and
• returning the fidelity of the two-qubit gate to the quantum platform.