  Tensor networks are factorizations of high-dimensional tensors into networks
of smaller tensors. They have applications in physics and mathematics, and
recently have been proposed as promising machine learning architectures. To
ease the integration of tensor networks in machine learning pipelines, we
introduce TensorKrowch, an open source Python library built on top of PyTorch.
Providing a user-friendly interface, TensorKrowch allows users to construct any
tensor network, train it, and integrate it as a layer in more intricate deep
learning models. In this paper, we describe the main functionality and basic
usage of TensorKrowch, and provide technical details on its building blocks and
the optimizations performed to achieve efficient operation.
