Tensor network theory

Tensor network theory is a mathematical framework used primarily in quantum physics and condensed matter physics to represent complex quantum states and perform calculations involving them. The core idea is to represent high-dimensional tensors (which can be thought of as a generalization of vectors and matrices) in a more manageable way using networks of interconnected tensors. This representation can simplify computations and help in understanding the structure of quantum states, particularly in many-body systems. ### Key Concepts 1.