Machine learning action parameters for lattice QCD · Emmy Trewartha. Hybrid Monte-Carlo. Critical...
Transcript of Machine learning action parameters for lattice QCD · Emmy Trewartha. Hybrid Monte-Carlo. Critical...
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Machine learning action parameters for lattice QCD
Emmy Trewartha
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Hybrid Monte-Carlo
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Critical Slowing down
S. Schaefer, R. Sommer, and F. Virotta (ALPHA), Nucl. Phys. B845, 93 (2011), 1009.5228
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Multiscale Lattice Generation
From Endres et al, PRD 92 no. 11 114516 (2015)
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Multiscale Lattice Generation - Parameter Matching
From Endres et al, PRD 94 no. 11 114502 (2016)
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Can neural networks help?
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Previous work: NNs able to learn SU(2) deconfinement transition using Polyakov loop
SJ Wetzel and M Scherzer, PRB96 no. 18 184410 (2017)
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Neural Networks
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Training set:
123 × 36 SU(2) ensembles of 1000 configurations each
Two grids in β, m space:
β ∈ {1.785, 1.835, 1.885, 1.935, 1.985} and m ∈ {−0.7, −0.8, −0.9, −1.0}, excluding the pair {β, m} = {1.985, −1.0}
β ∈ {1.76, 1.81, 1.86, 1.91} and m ∈ { −0.75, −0.85, −0.95, −1.05}, excluding the pair {β, m} = {1.91, −1.05}
850 randomly selected configurations used for training, 150 for validation
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First Attempt: Configurations as input directly
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Measure independence of configs using autocorrelation;
At large τ behaves as;
Then define
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Define;
Generate ten independent streams of 10,000 trajectories denoted F1, . . . , F10, saved every trajectory, generated with the same values of β = 1.76 and m0 = −0.75.
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Autocorrelation from classifier network
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Interpretability - custom network design?
SJ Wetzel and M Scherzer, PRB96 no. 18 184410 (2017)
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Interpretability - interpretable mid-layers?
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Interpretability - Partial Derivatives?
K. Simonyan, A. Vedaldi, and A. Zisserman. ICLR Workshop, 2014
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Interpretability - Pixelwise Relevance?
Bach S, Binder A, Montavon G, Klauschen F, Müller KR, et al. (2015) PLOS ONE 10(7): e0130140
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Interpretability -Pixelwise Relevance?
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Sitewise Classifier Derivatives
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Incorporating Symmetries in Network Design
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Incorporating Symmetries in Network Design
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Second attempt: Incorporate symmetries directly
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Symmetrized Loops Correlated Products
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Correlated Products on Test Ensembles
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SummarySymmetry respecting neural networks are able to solve the lattice parameter regression problem well
Fully connected networks reveal an unknown feature of longer correlation length than any observable studied
Neural networks are able to learn non-trivial features of lattice gauge field theories