chore(🦀): release quizx 0.4.0

pybindings/Cargo.toml

@@ -14,7 +14,7 @@ name = "libquizx"
 crate-type = ["cdylib"]
 
 [dependencies]
-quizx = { version = "0.3.0", path = "../quizx" }
+quizx = { version = "0.4.0", path = "../quizx" }
 num = { workspace = true }
 pyo3 = { workspace = true, features = [
     "extension-module",

quizx/CHANGELOG.md

@@ -4,6 +4,42 @@ This is the changelog for the `quizx` rust library.
 For the changelog of the `quizx` python library, see the separate [`CHANGELOG.md`](https://github.com/zxcalc/quizx/blob/master/pybindings/CHANGELOG.md) file.
 
 
+## [0.4.0](https://github.com/zxcalc/quizx/compare/quizx@v0.3.0...quizx@v0.4.0) - 2026-11-01
+
+### Breaking Changes
+
+- Graphs now use `Scalar4` with four `Dyadic` coefficients instead of `FScalar`. Replace `FScalar::dyadic(pow, coeffs)` with `Scalar4::new(coeffs, pow)`, and use `TryFrom`/`TryInto` to convert to `Complex<f64>`. ([#158](https://github.com/zxcalc/quizx/pull/158))
+- Use `Tensor4`/`to_tensor4()` for `Scalar4` tensors. `TensorF`/`to_tensorf()` now represent `Complex<f64>` tensors, replacing `Tensor64`/`to_tensor64()`. Custom `TensorElem` implementations must provide `TryFrom<Scalar4>` with a `Debug` error type instead of `From<FScalar>`. ([#158](https://github.com/zxcalc/quizx/pull/158))
+- Upgrade `rand` to 0.9. Downstream code passing random number generators into QuiZX APIs must use the corresponding `rand` 0.9 types and traits. ([#166](https://github.com/zxcalc/quizx/pull/166))
+
+### Bug Fixes
+
+- Fix a typo in the README
+- Fix cut-rank caching ([#173](https://github.com/zxcalc/quizx/pull/173))
+- Remove stale edges from the rank cache
+- Fix another rankwidth caching bug
+- Preserve boundaries and scalars when copying graphs ([#199](https://github.com/zxcalc/quizx/pull/199))
+- Parse Qiskit phase gates in custom QASM definitions ([#200](https://github.com/zxcalc/quizx/pull/200))
+- Avoid adding two edges for a self-loop ([#187](https://github.com/zxcalc/quizx/pull/187))
+- Support ancillae and post-selection in circuit tensors ([#203](https://github.com/zxcalc/quizx/pull/203))
+- Fix mantissa overflows ([#204](https://github.com/zxcalc/quizx/pull/204))
+
+### New Features
+
+- [**breaking**] Add a dyadic rational type and scalars based on it ([#158](https://github.com/zxcalc/quizx/pull/158))
+- Use `bitgauss` for fast GF(2) linear algebra ([#161](https://github.com/zxcalc/quizx/pull/161))
+- [**breaking**] Add low-rankwidth decompositions of ZX diagrams ([#166](https://github.com/zxcalc/quizx/pull/166))
+- [**breaking**] Add Python bindings for rankwidth functions ([#168](https://github.com/zxcalc/quizx/pull/168))
+- Add keyword arguments and properties to Python bindings ([#169](https://github.com/zxcalc/quizx/pull/169))
+- Extend PyZX compatibility to `>=0.9,<0.11` ([#198](https://github.com/zxcalc/quizx/pull/198))
+- Implement approximate equality of tensors with floating-point scalars ([#137](https://github.com/zxcalc/quizx/issues/137), [#182](https://github.com/zxcalc/quizx/pull/182))
+- Implement `Circuit::optimize` (basic gate-level optimisation) ([#193](https://github.com/zxcalc/quizx/pull/193))
+- Implement the Z–X bialgebra rewrite rule ([#189](https://github.com/zxcalc/quizx/pull/189))
+
+### Testing
+
+- Add unit tests for `gate`, `phase`, `util`, `random_graph`, `annealer`, `cli`, and `json` ([#188](https://github.com/zxcalc/quizx/pull/188))
+
 ## [0.3.0](https://github.com/zxcalc/quizx/compare/quizx@v0.2.0...quizx@v0.3.0) - 2025-06-12
 
 ### Bug Fixes

quizx/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "quizx"
-version = "0.3.0"
+version = "0.4.0"
 description = "Quantum Circuit Optimisation and Compilation using the ZX-calculus"
 keywords = ["Quantum", "ZX-calculus", "Optimisation", "Compilation"]
 categories = ["science"]