The Qubit Fidelity Under Different Error Mechanisms Based on Error Correction Threshold

Quantum error correction is a crucial step to realize large-scale universal quantum computing, and the condition for realizing that probability of each operation must below some threshold. This requires qubits’ quality gates precision can reach certain level experimentally. We firstly discuss mechanism errors: corresponds unitary operator errors, qubits attributed decoherence. Then, according threshold surface code correction, we proved minimum gate fidelity should not be less than 1 − p with , found natural decoherence time used correction. provides kind theoretical supports preparation performing operations