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An efficient matrix product operator representation of the quantum chemical Hamiltonian

Open access
Keller, Sebastian, Dolfi, Michele, Troyer, Matthias, Reiher, Markus·2015·The Journal of Chemical Physics

Abstract

We describe how to efficiently construct the quantum chemical Hamiltonian operator in matrix product form. We present its implementation as a density matrix renormalization group (DMRG) algorithm for quantum chemical applications. Existing implementations of DMRG for quantum chemistry are based on the traditional formulation of the method, which was developed from the point of view of Hilbert space decimation and attained higher performance compared to straightforward implementations of matrix product based DMRG. The latter variationally optimizes a class of ansatz states known as matrix product states, where operators are correspondingly represented as matrix product operators (MPOs). The MPO construction scheme presented here eliminates the previous performance disadvantages while retaining the additional flexibility provided by a matrix product approach, for example, the specification of expectation values becomes an input parameter. In this way, MPOs for different symmetries — abelian and non-abelian — and different relativistic and non-relativistic models may be solved by an otherwise unmodified program.

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Metadata

Authors
Keller, S., Dolfi, M., Troyer, M., & Reiher, M.
Venue
The Journal of Chemical Physics
Published
2015-12-28
Volume
143
Issue
24
Pages
244118-244118
ISSN
  • 0021-9606 (ISSN-L)
  • 1089-7690
OpenAlex
W1828807789
Cited by
182
References
7
FWCI
7.64
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: An efficient matrix product operator representation of the quantum chemical Hamiltonian. https://app.cochat.ai/papers/10.1063/1.4939000
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Keller, S., Dolfi, M., Troyer, M., & Reiher, M. (2015). An efficient matrix product operator representation of the quantum chemical Hamiltonian. The Journal of Chemical Physics. https://doi.org/10.1063/1.4939000

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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