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Efficient numerical simulations with Tensor Networks: Tensor Network Python (TeNPy)

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abstract

Tensor product state (TPS) based methods are powerful tools to efficiently simulate quantum many-body systems in and out of equilibrium. In particular, the one-dimensional matrix-product (MPS) formalism is by now an established tool in condensed matter theory and quantum chemistry. In these lecture notes, we combine a compact review of basic TPS concepts with the introduction of a versatile tensor library for Python (TeNPy) [https://github.com/tenpy/tenpy]. As concrete examples, we consider the MPS based time-evolving block decimation and the density matrix renormalization group algorithm. Moreover, we provide a practical guide on how to implement abelian symmetries (e.g., a particle number conservation) to accelerate tensor operations.

years

2026 1 2025 3

verdicts

UNVERDICTED 4

representative citing papers

Quantum circuit complexity and unsupervised machine learning of topological order

quant-ph · 2025-08-06 · unverdicted · novelty 7.0

Nielsen quantum circuit complexity is positioned as a topological distance for unsupervised learning of topological order, with theorems linking it to Bures distance and entanglement to yield practical fidelity- and entanglement-based kernels demonstrated on XXZ chains and toric code.

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