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| 1 | +# Changelog |
| 2 | + |
| 3 | +All notable changes to this project will be documented in this file. |
| 4 | + |
| 5 | +The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), |
| 6 | +and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html). |
| 7 | + |
| 8 | +## Guidelines for updating this changelog |
| 9 | + |
| 10 | +When making changes to this project, please update the "Unreleased" section with your changes under the appropriate category: |
| 11 | + |
| 12 | +- **Added** for new features. |
| 13 | +- **Changed** for changes in existing functionality. |
| 14 | +- **Deprecated** for soon-to-be removed features. |
| 15 | +- **Removed** for now removed features. |
| 16 | +- **Fixed** for any bug fixes. |
| 17 | +- **Performance** for performance improvements. |
| 18 | + |
| 19 | +When releasing a new version, move the "Unreleased" changes to a new version section with the release date. |
| 20 | + |
| 21 | +## [Unreleased](https://github.com/quantumkithub/pepskit.jl/compare/v0.7.0...HEAD) |
| 22 | + |
| 23 | +### Added |
| 24 | + |
| 25 | +### Changed |
| 26 | + |
| 27 | +### Deprecated |
| 28 | + |
| 29 | +### Removed |
| 30 | + |
| 31 | +### Fixed |
| 32 | + |
| 33 | +### Performance |
| 34 | + |
| 35 | +## [0.7.0](https://github.com/quantumkithub/pepskit.jl/compare/v0.6.1...v0.7.0) - 2025-11-17 |
| 36 | + |
| 37 | +### Added |
| 38 | + |
| 39 | +- Real time and finite-temperature evolution functionality for simple update |
| 40 | +- Correlator for mixed state `InfinitePEPO` |
| 41 | +- `SUWeight` to `CTMRGEnv` conversion (as `InfinitePEPS` environment) |
| 42 | +- Simple update for PEPO (including 3-site version) |
| 43 | +- Single-layer and double-layer PEPO reduced density matrix |
| 44 | +- `spacetype` method for `InfinitePartitionFunction` |
| 45 | +- Support for `SU2Irrep` symmetry in `j1_j2_model` |
| 46 | + |
| 47 | +### Changed |
| 48 | + |
| 49 | +- A unified interface for Trotter-based time evolution algorithms. The old `su_iter`, `simpleupdate` functions should be replaced by `timestep`, `time_evolve` respectively |
| 50 | +- Default fixed-point gradient algorithm changed to `:eigsolver` |
| 51 | +- BoundaryMPS methods now have their own custom transfer functions, avoiding a double conjugation and twist issues for fermions |
| 52 | +- `physicalspace` and related functions now correctly handle periodic indexing for infinite networks |
| 53 | +- Updated compatibility with TensorKit v0.15 |
| 54 | +- Runic formatter |
| 55 | + |
| 56 | +### Removed |
| 57 | + |
| 58 | +- `InfiniteWeightPEPS` and `mirror_antidiag` |
| 59 | +- Support for integer space specifiers in state and environment constructors |
| 60 | +- Removed redefinition of `tensorexpr` |
| 61 | +- Support for dual physical spaces for non-bosonic symmetries |
| 62 | + |
| 63 | +### Fixed |
| 64 | + |
| 65 | +- Add unit normalization of the half and full infinite environments before the projector computation, fixing an issue with the gradient accuracy |
| 66 | +- Fix sporadic test timeouts when running variational optimization after simple update for the Heisenberg model by switching to a `GMRES`-based gradient solver |
| 67 | +- Rotation of iPEPO is now done correctly |
| 68 | +- Fix `rotl90`, `rotr90` and `rot180` for `LocalOperator` |
| 69 | +- Fix XXZ model convention |
| 70 | +- Fix `add_physical_charge` for fermionic operators |
| 71 | +- Fix `maxiter` behavior for fallback gradient linear solver |
| 72 | +- Fix gauge fixing in `:fixed` mode for non-uniform unit cells from full SVD |
| 73 | + |
| 74 | + |
| 75 | +### Performance |
| 76 | + |
| 77 | +- Avoid `@autoopt` for partition function calculations |
| 78 | +- Multithreaded scheduler now correctly taken into account for the reverse rules. |
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