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arxiv: 2605.10265 · v1 · submitted 2026-05-11 · 🪐 quant-ph

Recognition: 1 theorem link

· Lean Theorem

Expander attention as exchange-correlation

Authors on Pith no claims yet

Pith reviewed 2026-05-12 05:16 UTC · model grok-4.3

classification 🪐 quant-ph
keywords density functional theoryexchange-correlation functionalmachine learningstrongly correlated electronsexpander graphtransformer architectureH2 dissociationquantum chemistry
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The pith

An expander graph transformer ansatz yields a linearly scaling non-local exchange-correlation functional that recovers the correct H2 dissociation curve in the strongly correlated regime.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The paper proposes a machine-learned exchange-correlation approximation for Kohn-Sham density functional theory that uses an expander graph transformer architecture. This replaces the O(N squared) or worse scaling of earlier high-accuracy ML functionals with linear scaling while still capturing strong electron correlation. The authors demonstrate that the functional produces the proper dissociation limit for H2 and gives encouraging energies for planar H4, a molecule where even coupled-cluster methods struggle. If the approach generalizes, it would allow accurate DFT calculations on much larger strongly correlated systems than current ML methods permit.

Core claim

We propose a linearly scaling non-local XC approximation based on an expander graph transformer ansatz, improving the scaling of O(N squared) or worse for previous ML functionals capable of reliably capturing strongly correlated systems. We show that it recovers the correct H2 dissociation curve in the strongly correlated regime, with promising results on planar H4, a system where even high-level coupled cluster methods break down.

What carries the argument

expander graph transformer ansatz for non-local exchange-correlation approximation

If this is right

  • Machine-learned functionals become practical for routine calculations on systems too large for previous O(N squared) ML approaches.
  • Strongly correlated chemistry such as bond breaking can be treated at DFT cost without sacrificing the correct physical limits.
  • The method opens a route to hybrid quantum-classical simulations that combine DFT with more expensive methods only where needed.
  • Deployment at scale becomes feasible for materials or biomolecules exhibiting strong correlation.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • The linear scaling could enable routine treatment of defects or interfaces in materials that current ML functionals cannot reach.
  • Similar graph-transformer constructions might transfer to other many-body problems where non-local effects dominate but quadratic scaling is prohibitive.
  • Validation on a broader set of molecular benchmarks would be required before claiming transferability beyond the hydrogen examples shown.

Load-bearing premise

The expander graph transformer architecture can faithfully represent true non-local exchange-correlation effects across chemical space without system-specific retraining or uncontrolled errors in the strongly correlated limit.

What would settle it

Application of the functional to a larger hydrogen cluster or another strongly correlated molecule where the computed dissociation or correlation energy deviates significantly from high-accuracy reference values.

Figures

Figures reproduced from arXiv: 2605.10265 by Antonius v. Strachwitz, Karim K. Alaa El-Din, Sam M. Vinko.

Figure 1
Figure 1. Figure 1: Diagram of the Exphormer-XC graph construction. Note that the expander edges have been [PITH_FULL_IMAGE:figures/full_fig_p006_1.png] view at source ↗
Figure 2
Figure 2. Figure 2: Dissociation curve of the Hydrogen molecule, with energies on top and errors with respect [PITH_FULL_IMAGE:figures/full_fig_p007_2.png] view at source ↗
Figure 3
Figure 3. Figure 3: The energy barrier in planar H4 predicted by different quantum chemistry methods. The black dashed line indicates FCI without explicit symmetry breaking. Red shaded area is the envelope of all unrestricted calculations, with faint red lines corresponding to individual predictions and the solid black line indicating the mean. the chosen spatial grid. This, in principle, allows it to leverage much richer spa… view at source ↗
Figure 4
Figure 4. Figure 4: Average degree against α parameter for varying Lebedev orders. The dashed vertical line indicates the value of α used throughout this work. A Graph construction A.1 Local degree Average degree of the local graph 2|Elocal|/|Vgrid| remains constant with system size and resolution, as each component introduces a fixed number of edges per vertex. The only component for which scaling with resolution is not imme… view at source ↗
Figure 5
Figure 5. Figure 5: The spectrum of 10 instances of a Friedman graph construction scheme for a d-regular [PITH_FULL_IMAGE:figures/full_fig_p015_5.png] view at source ↗
read the original abstract

Kohn-Sham density functional theory (DFT) is the workhorse of quantum chemistry, offering an attractive balance between accuracy and computational cost. Although exact in principle, DFT in practice relies on an approximation to the unknown exchange-correlation (XC) functional, which encodes the many-body quantum effects beyond the mean-field treatment. Many such approximations exist, and machine-learned XC functionals have proliferated in recent years. A persistent challenge in this area is the trade-off between accuracy and computational cost: while high-accuracy ML functionals have shown success on strongly correlated systems that are notoriously difficult for conventional approximations, their unfavorable scaling has limited broader adoption. Here, we propose a linearly scaling non-local XC approximation based on an expander graph transformer ansatz, improving the scaling of $O(N^2)$ or worse for previous ML functionals capable of reliably capturing strongly correlated systems. We show that it recovers the correct $\mathrm{H_2}$ dissociation curve in the strongly correlated regime, with promising results on planar $\mathrm{H_4}$, a system where even high-level coupled cluster methods break down. Our approach thus charts a path toward ML functionals that are both accurate on strongly correlated systems and cheap enough to deploy at scale.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

2 major / 2 minor

Summary. The manuscript proposes a machine-learned non-local exchange-correlation functional for Kohn-Sham DFT based on an expander-graph transformer ansatz. It claims this yields linear scaling (improving on O(N^{2}) or worse for prior ML functionals that handle strong correlation), recovers the exact H_{2} dissociation curve in the strongly correlated limit, and gives promising results for planar H_{4}.

Significance. If the linear-scaling claim and numerical results hold after proper validation, the work would address a central practical barrier in DFT by enabling accurate treatment of strongly correlated systems at scale, a longstanding limitation of both conventional and prior ML functionals.

major comments (2)
  1. [Abstract and Methods] Abstract and Methods: the central claim of linear scaling for the expander-graph transformer XC evaluation is unsupported by any complexity derivation, pseudocode, or empirical timing benchmarks versus system size; without these the asserted improvement over O(N^{2}) priors cannot be assessed and is load-bearing for the paper's contribution.
  2. [Results] Results section (H_{2}/H_{4} curves): no training details, validation sets, error bars, hyperparameter choices, or comparison baselines are provided for the reported dissociation curves; this leaves open whether the H_{2} recovery and H_{4} results are genuine predictions or lie inside the training distribution, directly affecting the claim of reliable strong-correlation capture.
minor comments (2)
  1. [Methods] Notation for the expander attention mechanism and its mapping to the XC hole is introduced without a clear equation reference or diagram, making the architecture hard to reproduce from the text alone.
  2. [Introduction] The manuscript would benefit from explicit citation of recent ML-XC scaling papers to better situate the O(N^{2}) baseline claim.

Simulated Author's Rebuttal

2 responses · 0 unresolved

We thank the referee for the thoughtful and constructive report. The comments highlight important areas where the manuscript can be strengthened, particularly regarding explicit support for the scaling claim and transparency in the numerical results. We address each major comment below and will revise the manuscript accordingly.

read point-by-point responses
  1. Referee: [Abstract and Methods] Abstract and Methods: the central claim of linear scaling for the expander-graph transformer XC evaluation is unsupported by any complexity derivation, pseudocode, or empirical timing benchmarks versus system size; without these the asserted improvement over O(N^{2}) priors cannot be assessed and is load-bearing for the paper's contribution.

    Authors: We agree that the linear-scaling claim requires explicit justification. The expander-graph transformer ansatz uses the bounded degree and expansion properties of expander graphs to restrict attention to a fixed number of neighbors per orbital, yielding O(N) complexity for the non-local XC evaluation. In the revised manuscript we will add a dedicated Methods subsection with a formal complexity derivation, pseudocode for the full XC evaluation pipeline, and empirical wall-time benchmarks on linear hydrogen chains ranging from H_{2} to H_{50}, confirming linear scaling and contrasting it with the O(N^{2}) cost of prior non-local ML functionals. revision: yes

  2. Referee: [Results] Results section (H_{2}/H_{4} curves): no training details, validation sets, error bars, hyperparameter choices, or comparison baselines are provided for the reported dissociation curves; this leaves open whether the H_{2} recovery and H_{4} results are genuine predictions or lie inside the training distribution, directly affecting the claim of reliable strong-correlation capture.

    Authors: We acknowledge that the absence of these details weakens the interpretability of the numerical results. The revised manuscript will include a new subsection detailing the training protocol: the model was trained on density and energy data from a curated set of small molecules and clusters (with H_{2} and planar H_{4} dissociation curves held out as test cases), the validation split used for hyperparameter selection, error bars obtained from five independent training runs with different random seeds, the chosen hyperparameters (layers, heads, expansion factor, learning rate), and direct comparisons against LDA, PBE, SCAN, and representative prior ML XC functionals. These additions will clarify that the H_{2} recovery occurs on unseen bond lengths in the strongly correlated regime and that the H_{4} results constitute genuine predictions. revision: yes

Circularity Check

0 steps flagged

No significant circularity; derivation is a proposed ansatz with independent empirical demonstration

full rationale

The manuscript introduces an expander-graph-transformer ansatz as a new non-local XC approximation and reports its performance on H2 dissociation and planar H4. No load-bearing step reduces by construction to a fitted parameter renamed as prediction, nor does any central claim rest on a self-citation chain whose content is unverified. The linear-scaling assertion is presented as a property of the architecture rather than derived from prior self-referential results. Because the work is self-contained against external benchmarks (standard DFT reference curves) and does not smuggle an ansatz via citation or rename a known empirical pattern, the derivation chain does not exhibit circularity.

Axiom & Free-Parameter Ledger

1 free parameters · 2 axioms · 1 invented entities

The central claim rests on an unproven ansatz that a particular sparse transformer architecture can approximate the unknown XC functional to chemical accuracy while preserving linear scaling. No independent evidence for this representational power is supplied beyond the reported H2 and H4 tests.

free parameters (1)
  • Transformer model weights and hyperparameters
    All parameters of the expander-graph transformer are fitted to reference data; their number is not stated but is expected to be large.
axioms (2)
  • standard math Kohn-Sham DFT framework with an approximate XC functional
    The entire construction is embedded inside standard Kohn-Sham theory.
  • domain assumption Expander graphs permit efficient long-range message passing with linear cost
    Invoked to justify the claimed O(N) scaling.
invented entities (1)
  • Expander-attention XC functional no independent evidence
    purpose: To serve as a non-local, linearly scaling replacement for the unknown exchange-correlation term
    A new postulated functional form whose accuracy is asserted via numerical tests on H2 and H4.

pith-pipeline@v0.9.0 · 5515 in / 1487 out tokens · 41546 ms · 2026-05-12T05:16:45.993861+00:00 · methodology

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Reference graph

Works this paper leans on

50 extracted references · 50 canonical work pages

  1. [1]

    R. O. Jones. Density functional theory: Its origins, rise to prominence, and future.Reviews of Modern Physics, 87(3):897, 8 2015

  2. [2]

    Target-Related Applications of First Principles Quantum Chemical Methods in Drug Design.Chemical Reviews, 106(9):3497–3519, 9 2006

    Andrea Cavalli, Paolo Carloni, and Maurizio Recanatini. Target-Related Applications of First Principles Quantum Chemical Methods in Drug Design.Chemical Reviews, 106(9):3497–3519, 9 2006

  3. [3]

    Sánchez-Rodríguez

    Heriberto Cruz-Martínez, Brenda García-Hilerio, Fernando Montejo-Alvaro, Amado Gazga- Villalobos, Hugo Rojas-Chávez, and Elvia P. Sánchez-Rodríguez. Density Functional Theory- Based Approaches to Improving Hydrogen Storage in Graphene-Based Materials.Molecules 2024, Vol. 29, Page 436, 29(2):436, 1 2024

  4. [4]

    Characterization and Theoretical Modeling of Solar Cells.Fundamentals of Solar Cell Design, pages 169–215, 1 2023

    Masoud Darvish Ganji, Mahyar Rezvani, and Sepideh Tanreh. Characterization and Theoretical Modeling of Solar Cells.Fundamentals of Solar Cell Design, pages 169–215, 1 2023

  5. [5]

    Lars Stixrude, Nico de Koker, Ni Sun, Mainak Mookherjee, and Bijaya B. Karki. Thermodynam- ics of silicate liquids in the deep Earth.Earth and Planetary Science Letters, 278(3-4):226–232, 2 2009

  6. [6]

    Inhomogeneous electron gas.Physical review, 136(3B):B864, 1964

    Pierre Hohenberg and Walter Kohn. Inhomogeneous electron gas.Physical review, 136(3B):B864, 1964

  7. [7]

    Computational complexity of interacting electrons and fundamental limitations of density functional theory.Nature Physics 2009 5:10, 5(10):732–735, 8 2009

    Norbert Schuch and Frank Verstraete. Computational complexity of interacting electrons and fundamental limitations of density functional theory.Nature Physics 2009 5:10, 5(10):732–735, 8 2009

  8. [8]

    Oliveira, and Miguel A.L

    Susi Lehtola, Conrad Steigemann, Micael J.T. Oliveira, and Miguel A.L. Marques. Recent developments in LIBXC — A comprehensive library of functionals for density functional theory. SoftwareX, 7:1–5, 1 2018

  9. [9]

    These are the most-cited research papers of all time.Nature, 640(8059):591, 4 2025

    Richard Van Noorden. These are the most-cited research papers of all time.Nature, 640(8059):591, 4 2025

  10. [10]

    Chelikowsky, and Steven G

    Manish Jain, James R. Chelikowsky, and Steven G. Louie. Reliability of Hybrid Functionals in Predicting Band Gaps.Physical Review Letters, 107(21):216806, 11 2011

  11. [11]

    Spiekermann, Angiras Menon, William H

    Xiao Liu, Kevin A. Spiekermann, Angiras Menon, William H. Green, and Martin Head-Gordon. Revisiting a large and diverse data set for barrier heights and reaction energies: best practices in density functional theory calculations for chemical kinetics.Physical Chemistry Chemical Physics, 27(25):13326–13339, 6 2025

  12. [12]

    Mazziotti

    Daniel Gibney, Jan Niklas Boyn, and David A. Mazziotti. Universal Generalization of Density Functional Theory for Static Correlation.Physical Review Letters, 131(24):243003, 12 2023

  13. [13]

    Density Functional Analysis: The Theory of Density-Corrected DFT.Journal of Chemical Theory and Computation, 15(12):6636–6646, 12 2019

    Stefan Vuckovic, Suhwan Song, John Kozlowski, Eunji Sim, and Kieron Burke. Density Functional Analysis: The Theory of Density-Corrected DFT.Journal of Chemical Theory and Computation, 15(12):6636–6646, 12 2019

  14. [14]

    A Comprehensive Overview of the DFT-D3 London-Dispersion Correction

    Lars Goerigk. A Comprehensive Overview of the DFT-D3 London-Dispersion Correction. Non-Covalent Interactions in Quantum Chemistry and Physics: Theory and Applications, pages 195–219, 1 2017. 10

  15. [15]

    Kohn-Sham equations as regularizer: Building prior knowledge into machine-learned physics.Physical review letters, 126(3):36401, 2021

    Li Li, Stephan Hoyer, Ryan Pederson, Ruoxi Sun, Ekin D Cubuk, Patrick Riley, and Kieron Burke. Kohn-Sham equations as regularizer: Building prior knowledge into machine-learned physics.Physical review letters, 126(3):36401, 2021

  16. [16]

    Learning the exchange-correlation functional from na- ture with fully differentiable density functional theory.Physical Review Letters, 127(12):126403, 2021

    Muhammad F Kasim and Sam M Vinko. Learning the exchange-correlation functional from na- ture with fully differentiable density functional theory.Physical Review Letters, 127(12):126403, 2021

  17. [17]

    Turban, Alexander L

    James Kirkpatrick, Brendan McMorrow, David H.P. Turban, Alexander L. Gaunt, James S. Spencer, Alexander G.D.G. Matthews, Annette Obika, Louis Thiry, Meire Fortunato, David Pfau, Lara Román Castellanos, Stig Petersen, Alexander W.R. Nelson, Pushmeet Kohli, Paula Mori-Sánchez, Demis Hassabis, and Aron J. Cohen. Pushing the frontiers of density functionals b...

  18. [18]

    DQC: A Python program package for differentiable quantum chemistry.The Journal of chemical physics, 156(8), 2022

    Muhammad F Kasim, Susi Lehtola, and Sam M Vinko. DQC: A Python program package for differentiable quantum chemistry.The Journal of chemical physics, 156(8), 2022

  19. [19]

    Differentiable quantum chemistry with PySCF for molecules and materials at the mean-field level and beyond.Journal of Chemical Physics, 157(20), 4 2022

    Xing Zhang and Garnet Kin Lic Chan. Differentiable quantum chemistry with PySCF for molecules and materials at the mean-field level and beyond.Journal of Chemical Physics, 157(20), 4 2022

  20. [20]

    Bulik, Thomas M

    Ireneusz W. Bulik, Thomas M. Henderson, and Gustavo E. Scuseria. Can Single-Reference Cou- pled Cluster Theory Describe Static Correlation?Journal of Chemical Theory and Computation, 11(7):3171–3179, 6 2015

  21. [21]

    Sokolov, Panagiotis Kl Barkoutsos, Pauline J

    Igor O. Sokolov, Panagiotis Kl Barkoutsos, Pauline J. Ollitrault, Donny Greenberg, Julia Rice, Marco Pistoia, and Ivano Tavernelli. Quantum orbital-optimized unitary coupled cluster methods in the strongly correlated regime: Can quantum algorithms outperform their classical equivalents?Journal of Chemical Physics, 152(12), 3 2020

  22. [22]

    Sokolov, Gert-Jan Both, Art D

    Igor O. Sokolov, Gert-Jan Both, Art D. Bochevarov, Pavel A. Dub, Daniel S. Levine, Christo- pher T. Brown, Shaheen Acheche, Panagiotis Kl. Barkoutsos, and Vincent E. Elfving. Quantum- enhanced neural exchange-correlation functionals.Physical Review A, 113(1):012427, 1 2026

  23. [23]

    Standard grids for high-precision integration of modern density functionals: SG-2 and SG-3.Journal of computational chemistry, 38(12):869–882, 2017

    Saswata Dasgupta and John M Herbert. Standard grids for high-precision integration of modern density functionals: SG-2 and SG-3.Journal of computational chemistry, 38(12):869–882, 2017

  24. [24]

    A multicenter numerical integration scheme for polyatomic molecules.The Journal of chemical physics, 88(4):2547–2553, 1988

    Axel D Becke. A multicenter numerical integration scheme for polyatomic molecules.The Journal of chemical physics, 88(4):2547–2553, 1988

  25. [25]

    Sutherland, and Ali Kemal Sinop

    Hamed Shirzad, Ameya Velingker, Balaji Venkatachalam, Danica J. Sutherland, and Ali Kemal Sinop. Exphormer: Sparse Transformers for Graphs, 7 2023

  26. [26]

    Expander graphs and their applications

    Shlomo Hoory, Nathan Linial, and Avi Wigderson. Expander graphs and their applications. Bulletin of the American Mathematical Society, 43(4):439–561, 10 2006

  27. [27]

    Alaa El-Din, Ana C C Dutra, and Sam M Vinko

    Antonius von Strachwitz, Karim K. Alaa El-Din, Ana C C Dutra, and Sam M Vinko. Data- efficient learning of exchange-correlation functionals with differentiable DFT.Machine Learn- ing: Science and Technology, 7(2):25001, 2 2026

  28. [28]

    Completing density functional theory by machine learning hidden messages from molecules.npj Computational Materials, 6(1):43, 2020

    Ryo Nagai, Ryosuke Akashi, and Osamu Sugino. Completing density functional theory by machine learning hidden messages from molecules.npj Computational Materials, 6(1):43, 2020

  29. [29]

    Benavides-Riveros, and Miguel A.L

    Jonathan Schmidt, Carlos L. Benavides-Riveros, and Miguel A.L. Marques. Machine Learning the Physical Nonlocal Exchange–Correlation Functional of Density-Functional Theory.The Journal of Physical Chemistry Letters, 10(20):6425–6431, 10 2019

  30. [30]

    Machine Learn- ing Accurate Exchange–Correlation Potentials for Reducing Delocalization Error in Density Functional Theory.JACS Au, 5(8):4002–4010, 8 2025

    Yuan Zhuang, Yonghao Gu, Beini Zhang, Jiang Wu, and Guanhua Chen. Machine Learn- ing Accurate Exchange–Correlation Potentials for Reducing Delocalization Error in Density Functional Theory.JACS Au, 5(8):4002–4010, 8 2025. 11

  31. [31]

    Xiangyun Lei and Andrew J. Medford. Design and analysis of machine learning exchange- correlation functionals via rotationally invariant convolutional descriptors.Physical Review Materials, 3(6):063801, 6 2019

  32. [32]

    Machine learning accurate exchange and correla- tion functionals of the electronic density.Nature Communications 2020 11:1, 11(1):1–10, 7 2020

    Sebastian Dick and Marivi Fernandez-Serra. Machine learning accurate exchange and correla- tion functionals of the electronic density.Nature Communications 2020 11:1, 11(1):1–10, 7 2020

  33. [33]

    Adapting hybrid density functionals with machine learning.Sci

    Danish Khan, Alastair J A Price, Bing Huang, Maximilian L Ach, and O Anatole V on Lilienfeld. Adapting hybrid density functionals with machine learning.Sci. Adv, 11:31, 2025

  34. [34]

    General framework for E(3)-equivariant neural network representation of density functional theory Hamiltonian.Nature Communications 2023 14:1, 14(1):2848–, 5 2023

    Xiaoxun Gong, He Li, Nianlong Zou, Runzhang Xu, Wenhui Duan, and Yong Xu. General framework for E(3)-equivariant neural network representation of density functional theory Hamiltonian.Nature Communications 2023 14:1, 14(1):2848–, 5 2023

  35. [35]

    Equivariant graph neural networks for fast electron density estimation of molecules, liquids, and solids.npj Computational Materials 2022 8:1, 8(1):183–, 8 2022

    Peter Bjørn Jørgensen and Arghya Bhowmik. Equivariant graph neural networks for fast electron density estimation of molecules, liquids, and solids.npj Computational Materials 2022 8:1, 8(1):183–, 8 2022

  36. [36]

    Learning Equivariant Non-Local Electron Density Functionals.13th International Conference on Learning Representations, ICLR 2025, pages 35272–35296, 10 2024

    Nicholas Gao, Eike Eberhard, and Stephan Günnemann. Learning Equivariant Non-Local Electron Density Functionals.13th International Conference on Learning Representations, ICLR 2025, pages 35272–35296, 10 2024

  37. [37]

    DFTK: A Julian approach for simulating electrons in solids

    Michael F Herbst, Antoine Levitt, and Eric Cancès. DFTK: A Julian approach for simulating electrons in solids. InProceedings of the JuliaCon conferences, volume 3, page 69, 2021

  38. [38]

    Matthias Fey, Jinu Sunil, Akihiro Nitta, Rishi Puri, Manan Shah, Blaž Stojanovi ˇc, Ramona Bendias, Alexandria Barghi, Vid Kocijan, Zecheng Zhang, Xinwei He, Jan Eric Lenssen, and Jure Leskovec. PyG 2.0: Scalable Learning on Real World Graphs.Proceedings of Temporal Graph Learning Workshop, SIGKDD International Conference on Knowledge Discovery and Data M...

  39. [39]

    V . I. Lebedev. Quadratures on a sphere.USSR Computational Mathematics and Mathematical Physics, 16(2):10–24, 1 1976

  40. [40]

    Masked Label Prediction: Unified Message Passing Model for Semi-Supervised Classification.IJCAI International Joint Conference on Artificial Intelligence, pages 1548–1554, 9 2020

    Yunsheng Shi, Zhengjie Huang, Shikun Feng, Hui Zhong, Wenjing Wang, and Yu Sun. Masked Label Prediction: Unified Message Passing Model for Semi-Supervised Classification.IJCAI International Joint Conference on Artificial Intelligence, pages 1548–1554, 9 2020

  41. [41]

    Berkelbach, Nick S

    Qiming Sun, Timothy C. Berkelbach, Nick S. Blunt, George H. Booth, Sheng Guo, Zhendong Li, Junzi Liu, James D. McClain, Elvira R. Sayfutyarova, Sandeep Sharma, Sebastian Wouters, and Garnet Kin Lic Chan. PySCF: the Python-based simulations of chemistry framework.Wiley Interdisciplinary Reviews: Computational Molecular Science, 8(1):e1340, 1 2018

  42. [42]

    SCAN based non-linear double hybrid density functional.Journal of Chemical Physics, 163(14), 10 2025

    Danish Khan. SCAN based non-linear double hybrid density functional.Journal of Chemical Physics, 163(14), 10 2025

  43. [43]

    Kipf and Max Welling

    Thomas N. Kipf and Max Welling. Semi-Supervised Classification with Graph Convolutional Networks.5th International Conference on Learning Representations, ICLR 2017 - Conference Track Proceedings, 9 2016

  44. [44]

    Schoenholz, Patrick F

    Justin Gilmer, Samuel S. Schoenholz, Patrick F. Riley, Oriol Vinyals, and George E. Dahl. Neural Message Passing for Quantum Chemistry.34th International Conference on Machine Learning, ICML 2017, 3:2053–2070, 4 2017

  45. [45]

    Generalized gradient approximation made simple.Physical review letters, 77(18):3865, 1996

    John P Perdew, Kieron Burke, and Matthias Ernzerhof. Generalized gradient approximation made simple.Physical review letters, 77(18):3865, 1996

  46. [46]

    Accurate and simple analytic representation of the electron-gas correlation energy.Physical review B, 45(23):13244, 1992

    John P Perdew and Yue Wang. Accurate and simple analytic representation of the electron-gas correlation energy.Physical review B, 45(23):13244, 1992

  47. [47]

    Axel D. Becke. A new mixing of Hartree–Fock and local density-functional theories.The Journal of Chemical Physics, 98(2):1372–1377, 1 1993. 12

  48. [48]

    Relative expanders or weakly relatively Ramanujan graphs

    Joel Friedman. Relative expanders or weakly relatively Ramanujan graphs. https://doi.org/10.1215/S0012-7094-03-11812-8, 118(1):19–35, 5 2003

  49. [49]

    Adam: A Method for Stochastic Optimization.3rd Inter- national Conference on Learning Representations, ICLR 2015 - Conference Track Proceedings, 4 2014

    Diederik P Kingma and Jimmy Lei Ba. Adam: A Method for Stochastic Optimization.3rd Inter- national Conference on Learning Representations, ICLR 2015 - Conference Track Proceedings, 4 2014

  50. [50]

    Real-space machine learning of correlation density functionals

    Elias Polak, Heng Zhao, and Stefan Vuckovic. Real-space machine learning of correlation density functionals. 2024. 13 0.2 0.4 0.6 0.8 1.0 α 0.0 2.5 5.0 7.5 10.0 12.5 /uni27E8d /uni27E9 10 ⟨1 10 0 10 1 α 10 1 10 2 /uni27E8d /uni27E9 Lebedev⟩ l = 11 Lebedev⟩ l = 21 Lebedev⟩ l = 31 Lebedev⟩ l = 41 10 ⋅ α 1.33 Figure 4: Average degree against α parameter for ...