Code

Fermionic OpSum to TTN constructor#122

Code

Merged

mtfishman merged 41 commits intoITensor:mainITensor/ITensorNetworks.jl:mainfrom b-kloss:AutoTTNO-fix-fermionb-kloss/ITensorNetworks.jl:AutoTTNO-fix-fermionCopy head branch name to clipboardJan 22, 2024

+288-94

Commits

Commits on Jan 12, 2024

• Initial commit, untested addition of compatibility with fermionic siteinds for TTN constructor.

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• Remove debugging output.

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• Add missing end.

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• Autofermion sign working for fermions, but not for electrons yet.

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• Fix flux for fermions by daggering Op. Still broken when using QNs and sites that have QN-sectors of size larger than one --- may or may not be specific to fermionic sites.

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• Add hubbard and tight-binding Hamiltonian to models.

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• Code working for fermions and electrons. Prior failure due to bug in hubbard Hamiltonian setup.

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• Move most of complicated qn/arrow-dir logic to the beginning of ttn_svd.

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• Cleanup. Leaving debug asserts in for the time being.

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• Restore state with regards to auto-fermion after test.

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• Merge branch 'main' into AutoTTNO-fix-fermion

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• Restore usual arrow directions.

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• Fix tests. Lower threshold in tests and workaround an issue when comparing blocks of fermionic tensors.

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Commits on Jan 14, 2024

• Add DMRG test for QNs + fermions on tree.

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• Fix typo in hubbard model.

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• Add ToDo annotation for randomTTN

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• Format.

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Commits on Jan 15, 2024

• Remove commented out models.

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Commits on Jan 21, 2024

• Implement suggested improvements to model, including general nth-neighbor function.

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• Adapt test_dmrg and test_dmrg_x, remove usage of Sweeps.

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• Merge branch 'main' into AutoTTNO-fix-fermion

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• Change use of nsite to nsites.

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• Refactor fermionic test and add comparison with single-particle energies.

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• Add comparison with JW string ITensors.MPO for fermions to DMRG.

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• ITensorGaussianMPS

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• Clean up test_opsum_to_ttn.jl

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• Format.

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• Format models.

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Commits on Jan 22, 2024

• Apply suggestions from code review

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• Minor edits on models and import LinearAlgebra.eigvals in test.

  

  Benedikt Kloss

  committed
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• Switch internal index direction to In regardless of whether autofermion is used and add comment.

  

  Benedikt Kloss

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• Have non-fermionic QN test in DMRG run with autofermion-sign enabled.

  

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• Remove output from src/models.jl

  

  Benedikt Kloss

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• Improve ITensor to matrix conversion.

  

  Benedikt Kloss

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• Format.

  

  Benedikt Kloss

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• Simplify ITensor Matrix conversion.

  

  Benedikt Kloss

  committed
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• Simplify expression for index direction and have a shallow copy of siteinds be sufficient.

  

  Benedikt Kloss

  committed
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• Add comment to remove autofermion enabling/disabling part of test once issue is addressed.

  

  Benedikt Kloss

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• Edit comment for copy os sites in ttn_svd.

  

  Benedikt Kloss

  committed
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• Remove outdated comment

  mtfishman

  authored
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• Style update

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