论文标题
路径积分轮廓变形的噪声可观察结果
Path integral contour deformations for noisy observables
论文作者
论文摘要
许多量子系统的蒙特卡洛研究面临着指数严重的信噪问题。我们表明，可以使用路径积分轮廓变形技术引入偏置而导致可观察结果的复杂相波动引起的噪声。阿贝尔仪表理论和复杂标量场理论中相关函数的轮廓变形的数值研究表明，可以通过不修改蒙特卡洛采样的数量级来降低方差。
Monte Carlo studies of many quantum systems face exponentially severe signal-to-noise problems. We show that noise arising from complex phase fluctuations of observables can be reduced without introducing bias using path integral contour deformation techniques. A numerical study of contour deformations for correlation functions in Abelian gauge theory and complex scalar field theory demonstrates that variance can be reduced by orders of magnitude without modifying Monte Carlo sampling.
