量子计算与量子信息科学前沿进展

1. 量子纠错与容错计算

1.1 表面码理论

from qiskit_qec.analysis import DecodingGraphAnalysis
from qiskit_qec.circuits import SurfaceCodeCircuit

# 表面码电路生成
def create_surface_code(d=3, rounds=1):
    """创建d×d表面码电路"""
    code = SurfaceCodeCircuit(d=d, T=rounds)
    return code

# 解码分析
def analyze_surface_code(code, error_rate=0.01):
    """分析表面码性能"""
    analysis = DecodingGraphAnalysis(code)
    threshold = analysis.calculate_threshold(error_rates=[error_rate])
    return threshold

# 示例：距离3的表面码
surface_code = create_surface_code(d=3)
print(f"表面码量子比特数: {surface_code.num_qubits}")
threshold = analyze_surface_code(surfac