TNQMetro: Tensor-network based package for efficient quantum metrology computations

TNQMetro is a numerical package written in Python for calculations of fundamental quantum bounds on measurement precision. Thanks to the usage of the tensor-network formalism it can beat the curse of dimensionality and provides an efficient framework to calculate bounds for finite size system as well as determine the asymptotic scaling of precision in systems where quantum enhancement amounts to a constant factor improvement over the Standard Quantum Limit. It is written in a user-friendly way so that the basic functions do not require any knowledge of tensor networks.

TNQMetro 是一款基于 Python 编写的数值计算工具包，用于开展测量精度的基础量子极限计算。依托张量网络（tensor-network）形式体系，它能够突破维度灾难，为有限尺寸系统的精度极限计算提供高效框架，同时可针对量子增强相较于标准量子极限（Standard Quantum Limit）仅实现常数因子精度提升的系统，确定其精度的渐近标度行为。该工具包采用用户友好的设计思路，其基础功能的使用无需掌握张量网络相关专业知识。