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Merged
Jakob-Unfried merged 91 commits into from
Oct 30, 2025
Merged

Shift symmetry #183

Jakob-Unfried merged 91 commits into from
Oct 30, 2025

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@jhauschild
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@jhauschild jhauschild commented Oct 20, 2022 •
edited by Jakob-Unfried
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Creating a pull request in an effort to finally merge this.

What's actually missing for this?

  • add a dipole-conserving example model using the shift symmetry
  • Write a small test to ensure everything works with non-trivial shift symmetry
  • Document the shift symmetry in the user guide

phzechm and others added 21 commits August 8, 2022 23:12
@phzechm
added functionality to shift charges
d44499c
@phzechm
modified mps and mpo classes: shift charges
73724ad
@phzechm
added functionality to shift charges
164f3b8
@phzechm
modified mps and mpo classes: shift charges
4fcffcd
@phzechm
make shift_charges accept 1D and 2D arrays
ffb8b0d
@phzechm
fix MPO construction and matvec of transfer matrix
10ba510
@phzechm
fix term correlations, canonical form and matvec of transfer matrix
f0565df
@jhauschild
Merge branch 'shift-symmetry' of github:tenpy/tenpy into shift-symmetry
47c0128 
Resolve conflicts after force-push
@phzechm
added shift_charge method to leg and site class
1d4cb05
@phzechm
patched lattice class to automatically apply shift
74438e7
@phzechm
fixed doctest error
1a1ad64
@phzechm
fixed correlation_function and extract_segment
90d2ba1
@phzechm
fix enlarge_mps_unit_cell and term_list_correlation_function_right
3ea188f
@phzechm
reset sorted and bunched attribute after shifting
3952f84
@phzechm
fix set_svd_theta
f446073
@phzechm
fix recalculating operators for finite MPS
800f1a0
@phzechm
fix apply_naively function
4cea247
@phzechm
fix a casting bug in permute
e04b14a
@phzechm
Merge branch 'main' into shift-symmetry
ba8ab6e
@phzechm
fix casting bug in permute, revisited
c77a1bb
@phzechm
fix enlarge_mps_unit_cell for MPO
059bc84
@Jakob-Unfried Jakob-Unfried added this to the Release 1.0 milestone Apr 25, 2023
@jhauschild jhauschild mentioned this pull request Jun 20, 2023
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jhauschild commented Aug 22, 2023

Just saying, it's probably a good idea to resolve the merge conflicts and merge the current main branch first, since #267 moved around measurmeent functions in mps.py as well, which this PR partially had to update as well. Let me know if you need help with that.

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Jakob-Unfried commented Aug 23, 2023 •
edited
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The merge introduced an error with purification MPS.
I have to stop working on this for now, so i pushed the mostly-complete merge
Fixed.

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Jakob-Unfried commented Aug 24, 2023

@phzechm Do you have code for dipole conserving (or other) models using the shift symmetry?

@Jakob-Unfried Jakob-Unfried mentioned this pull request Oct 14, 2025
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@Jakob-Unfried Jakob-Unfried mentioned this pull request Oct 24, 2025
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Jakob-Unfried commented Oct 28, 2025 •
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Only thing missing now is to adjust the new MPO environment building from #507 .

I am happy with doing only the bare minimum to get iDMRG running again and deferring edge cases / clean up to #560.
We should merge this ASAP, so we can get started with v2.

I dont understand the details of the new MPO environment builder, and hopefully we can fix this without me having to understand the details.
I have asked @anton-romen for help...

@Jakob-Unfried Jakob-Unfried mentioned this pull request Oct 30, 2025
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@Jakob-Unfried Jakob-Unfried mentioned this pull request Oct 30, 2025
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@Jakob-Unfried Jakob-Unfried merged commit 818b8a5 into main Oct 30, 2025
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@Jakob-Unfried Jakob-Unfried deleted the shift-symmetry branch October 30, 2025 16:22
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