Release v0.8.0 (#379)

* Update changelog for v0.8.0

* Bump version to v0.8.0

* Update CITATION.cff for v0.8.0

* Apply suggestions from code review

[skip ci]

Co-authored-by: Yue Zhengyuan <yuezy1997@icloud.com>
Co-authored-by: Paul Brehmer <paulbrehmer8@googlemail.com>

* Update Changelog

* Rerun examples

* Update changelog

---------

Co-authored-by: Yue Zhengyuan <yuezy1997@icloud.com>
Co-authored-by: Paul Brehmer <paulbrehmer8@googlemail.com>
Co-authored-by: Paul Brehmer <paul.brehmer@univie.ac.at>
Co-authored-by: leburgel <lander.burgelman@gmail.com>

Author: 4 people

CITATION.cff

@@ -14,8 +14,8 @@ authors:
     given-names: "Lukas"
     orcid: "https://orcid.org/0000-0002-0256-4200"
 title: "PEPSKit"
-version: 0.7.0
+version: 0.8.0
 identifiers:
   - type: doi
     value: 10.5281/zenodo.13938737
-date-released: 2025-08-06
+date-released: 2026-05-08

Project.toml

@@ -1,6 +1,6 @@
 name = "PEPSKit"
 uuid = "52969e89-939e-4361-9b68-9bc7cde4bdeb"
-version = "0.7.0"
+version = "0.8.0"
 authors = ["Paul Brehmer", "Lander Burgelman", "Zhengyuan Yue", "Lukas Devos <ldevos98@gmail.com>"]
 
 [workspace]

docs/src/changelog.md

@@ -18,25 +18,79 @@ When making changes to this project, please update the "Unreleased" section with
 
 When releasing a new version, move the "Unreleased" changes to a new version section with the release date.
 
-## [Unreleased](https://github.com/quantumkithub/pepskit.jl/compare/v0.7.0...HEAD)
+## [Unreleased](https://github.com/quantumkithub/pepskit.jl/compare/v0.8.0...HEAD)
 
 ### Added
 
 ### Changed
 
-- Bump OptimKit.jl compatibility to v0.4
-- Move `info.truncation_error` and `info.condition_number` into the `info.contraction_metrics` named tuple for `leading_boundary` and `fixedpoint`
-
 ### Deprecated
 
 ### Removed
 
-- Unused implementations of `LinearAlgebra` methods for `CTRMGEnv` and `InfinitePEPS`
+### Fixed
+
+### Performance
+
+## [0.8.0](https://github.com/quantumkithub/pepskit.jl/compare/v0.7.0...v0.8.0) - 2026-06-05
+
+### Added
+
+- `FullPullback` and `TruncPullback` to specify pullbacks using a full untruncated or only truncated decomposition respectively (#382)
+- `FixedPointGradient` type, containing a specific solver for solving the fixed-point gradient linear problem (#386)
+- CTMRG benchmark suite (#384)
+- Rotation of `LocalCircuit` (#349)
+- `LocalCircuit` operator type, alongside refactor of `LocalOperator` operator types (#347)
+- N-site Simple Update (#339)
+- C4v CTMRG support, including QR-CTMRG variant (#321, #329)
+- Belief propagation gauge fixing, with bipartite specialization and support for purified iPEPO (#223, #318, #319)
+
+### Changed
+
+- Bump VectorInterface compat to include v0.6 (#389)
+- Make checks on rotation and reflection symmetry when using C4v CTMRG into warnings (#385)
+- Allow unsorted site indices in `LocalCircuit` (#387)
+- Periodic indexing improvements (#377)
+- Rename algorithm symbols (#376)
+- Update decomposition handling (#364)
+- Return `info.converged` flag and `info.convergence_error` in `leading_boundary` named tuple (#365)
+- Improve Vidal gauge conversion and CTM bond env for PEPO (#348)
+- Rename `bondenv_fu` to `bondenv_ctm` (#343)
+- Refactor simple update / reorganize trotter and apply_gate code (#338, #346). Each term of the input Hamiltonian `LocalOperator` is now exponentiated individually when constructing the Trotter gates in the resulting `LocalCircuit`.
+- Move `info.truncation_error` and `info.condition_number` into the `info.contraction_metrics` named tuple for `leading_boundary` and `fixedpoint` (#337)
+- `fixedpoint` improvements; relax `env₀` type restriction in `select_algorithm` (#337, #345)
+- Use MatrixAlgebraKit SVD pullbacks (#335)
+- Bump TensorKit compat to 0.16 (#314)
+- Make `SUWeight` axis order definite (#315)
+- Bump OptimKit.jl compatibility to v0.4 (#307)
+- Improve bond truncation algorithms (#303). In particular, the 3-leg reduced bond tensors now follows the leg order convention of an MPS.
+
+### Removed
+
+- `FullEighPullback`, `TruncEighPullback`, `FullSVDPullback`, `TruncSVDPullback` and `QRPullback` types, in favor of more generic pullback specification across algorithms (#382)
+- `LinSolver` and `EigSolver` types, and `iterscheme` keyword for specifying the style of and solver for fixed-point differentiation (#386)
+- `:diffgauge` differentiation mode, also for eigh-based C4v CTMRG (#334, #370)
+- Unused implementations of `LinearAlgebra` methods for `CTRMGEnv` and `InfinitePEPS` (#307)
 
 ### Fixed
 
+- Fix undefined `dir` variable in error message in `TensorMap(::EnlargedCorner)` (#392)
+- Ensure MPSKit overloads accept all keywords to intercept all dispatches (#374)
+- `FixedSpaceTruncation` for simple update (#360)
+- Stack overflow in `renormalize_southwest_corner` (#344)
+- Broken gradients for C4v eigh-CTMRG (#333)
+- CTMRG contraction inconsistencies (#327)
+- Typo in `SimpleUpdate` info (#313)
+- Typo in `edge_transfer_right` (#310)
+- MPS cluster truncation with standard virtual arrows (#309)
+- Small fixes for `InfiniteSquareNetwork` and `InfinitePartitionFunction` (#306)
+- Zero gate returned by `get_gateterm` (#300)
+
 ### Performance
 
+- Improve simple update performance (#361)
+- Improve efficiency of bond truncation (#366)
+
 ## [0.7.0](https://github.com/quantumkithub/pepskit.jl/compare/v0.6.1...v0.7.0) - 2025-11-17
 
 ### Added

docs/src/examples/2d_ising_partition_function/index.md

@@ -108,7 +108,7 @@ env, = leading_boundary(env₀, Z; tol = 1.0e-8, maxiter = 500);
 
 ````
 [ Info: CTMRG init:	obj = +1.784252138312e+00 -1.557258880375e+00im	err = 1.0000e+00
-[ Info: CTMRG conv 63:	obj = +3.353928644031e+00	err = 4.6025219721e-09	time = 4.33 sec
+[ Info: CTMRG conv 63:	obj = +3.353928644031e+00	err = 4.6004752156e-09	time = 13.19 sec
 
 ````
 
@@ -143,9 +143,9 @@ e = expectation_value(Z, (1, 1) => E, env)
 ````
 
 ````
-λ = 3.35392864403138 - 7.635344033856476e-16im
-m = 0.9736086674403008 + 0.0im
-e = -1.8637796145082446 - 3.652351409579798e-17im
+λ = 3.3539286440313774 - 3.523947186423873e-16im
+m = 0.9736086674403006 + 5.4786163733942095e-17im
+e = -1.8637796145082453 - 3.65241091559614e-17im
 
 ````
 
@@ -189,9 +189,9 @@ extrapolation):
 ````
 
 ````
-(-(log(λ)) / beta - f_exact) / f_exact = -2.2018543465885093e-16 - 1.8812300485443252e-16im
-(abs(m) - abs(m_exact)) / abs(m_exact) = 3.420952570843561e-16
-(e - e_exact) / e_exact = -0.02373206809909008 + 1.9131411940819196e-17im
+(-(log(λ)) / beta - f_exact) / f_exact = -8.807417386354037e-16 - 8.682457931414856e-17im
+(abs(m) - abs(m_exact)) / abs(m_exact) = 1.1403175236145204e-16
+(e - e_exact) / e_exact = -0.023732068099089728 + 1.9131723639772534e-17im
 
 ````