Cited by 88Quantum many-body systemsQuantum Computing Algorithms and ArchitectureNumerical methods for differential equations

Real time evolution with neural-network quantum states

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Gutiérrez, Irene López, Mendl, Christian B.·2022·Quantum

Abstract

A promising application of neural-network quantum states is to describe the time dynamics of many-body quantum systems. To realize this idea, we employ neural-network quantum states to approximate the implicit midpoint rule method, which preserves the symplectic form of Hamiltonian dynamics. We ensure that our complex-valued neural networks are holomorphic functions, and exploit this property to efficiently compute gradients. Application to the transverse-field Ising model on a one- and two-dimensional lattice exhibits an accuracy comparable to the stochastic configuration method proposed in [Carleo and Troyer, Science 355, 602-606 (2017)], but does not require computing the (pseudo-)inverse of a matrix.

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Crossref · 10.22331/q-2022-01-20-627

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  • Since e^{iτH} is not a local operator that we can easily evaluate on our variational wave function, in practice we have to approximate the full unitary propagator.

    “Since e iτ H is not a local operator that we can easily evaluate on our variational wave function, in practice we have to approximate the full unitary propagator, which can be done in several ways 57,137,138 .”

    From Beyond-classical computation in quantum simulation (2025) · cites this paper as [137]

    Section 2, “Time evolution method” (page not specified), describes approximating a Schrödinger-equation time step with an implicit midpoint method. It does not say that the exponential propagator is nonlocal or difficult to evaluate on a variational wave function, and it also describes stochastic reconfiguration as another approach; thus it does not support the claim that one has to approximate the full unitary propagator. (LLM, conf=0.82)

    Experimental — accuracy not yet measured

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Research works printed but not linked: 1

  1. C. Trabelsi, O. Bilaniuk, Y. Zhang, D. Serdyuk, S. Subramanian, J. F. Santos, S. Mehri, N. Ros- tamzadeh, Y. Bengio, and C. J. Pal. Deep com- plex networks. In International Conference on Learning Representations, 2018. URL https: //openreview.net/forum?id=H1T2hmZAb.

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Authors
Gutiérrez, I. L., & Mendl, C. B.
Affiliations
Technical University of Munich (DE)
Venue
Quantum
Published
2022-01-20
Volume
6
Pages
627
ISSN
2521-327X (ISSN-L)
OpenAlex
W2994906999
Cited by
20
References
41
Citations by year
2023: 1 · 2022: 4 · 2021: 8 · 2020: 7
FWCI
0.51
Type
journal article
Language
en
Open access
Locations
  • Quantum (publishedVersion, cc-by)
  • arXiv (Cornell University) (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • mediaTUM – the media and publications repository of the Technical University Munich (Technical University Munich) (submittedVersion, other-oa)
  • arXiv (Cornell University) (cc-by)
  • Bulletin of the American Physical Society
Funders
Munich Center for Quantum Science and Technology
Topics
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum many-body systems
  • Physical Sciences › Computer Science › Artificial Intelligence › Quantum Computing Algorithms and Architecture
  • Physical Sciences › Mathematics › Numerical Analysis › Numerical methods for differential equations
Keywords
neural quantum states, time evolution, quantum many-body systems, implicit midpoint rule, symplectic integration, complex-valued neural networks, analytic functions, gradient computation, transverse-field Ising model

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