Autor: |
Tichai, A., Arthuis, P., Hebeler, K., Heinz, M., Hoppe, J., Schwenk, A. |
Jazyk: |
angličtina |
Rok vydání: |
2021 |
Zdroj: |
Physics Letters |
Popis: |
The extension of ab initio quantum many-body theory to higher accuracy and larger systems is intrinsically limited by the handling of large data objects in form of wave-function expansions and/or many-body operators. In this work we present matrix factorization techniques as a systematically improvable and robust tool to significantly reduce the computational cost in many-body applications at the price of introducing a moderate decomposition error. We demonstrate the power of this approach for the nuclear two-body systems, for many-body perturbation theory calculations of symmetric nuclear matter, and for non-perturbative in-medium similarity renormalization group simulations of finite nuclei. Establishing low-rank expansions of chiral nuclear interactions offers possibilities to reformulate many-body methods in ways that take advantage of tensor factorization strategies. |
Databáze: |
OpenAIRE |
Externí odkaz: |
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