v0.3.4

ExactDiagonalization v0.3.4

Diff since v0.3.3

New Features

• normalize function for ExactDiagonalization: added a normalize function that adjusts term factors for exact diagonalization. For Pairing terms, the factor is multiplied by 1//2 because ED does not use BdG-form symmetrization unlike TBA.

• Sector constructor for ℤ₁ quantum number: added a new Sector(::ℤ₁, hilbert, ...) constructor, enabling sector construction with ℤ₁ quantum number symmetry.

• BandLanczosMethod keepvecs default changed to true: the keepvecs parameter now defaults to true, retaining Lanczos vectors by default for better usability.

Dependency Updates

• QuantumLattices: 0.14.4 → 0.14.7

Tests

• Added GreenFunction ED vs TBA and GreenFunction ED vs BdG test sets comparing ED results against TBA/BdG calculations

v0.3.3

ExactDiagonalization v0.3.3

Diff since v0.3.2

v0.3.2

ExactDiagonalization v0.3.2

Diff since v0.3.1

This release improves the RetardedGreenFunction API, fixes a spectral function calculation bug, and enhances logging and code clarity.

New features

• Add e₀, v₀, sector₀ keyword arguments to RetardedGreenFunction constructors. When all three are provided, eigen-computation is skipped for efficiency.

Bug fixes

• Fix spectral function calculation by removing an erroneous factor of 2.
• Fix scalartype dispatch for ED with L<:Union{AbstractLattice, Nothing} and CategorizedGenerator.

Improvements

• Rename reset! to set! in GreenFunctions to better reflect its purpose.
• Rename Greek-letter variables (Ω → v₀, E₀ → e₀, sector → sector₀) to Latin equivalents for clarity and Julia naming conventions.
• Add RawStderrLogger for verbatim @info log output; refine logging messages throughout GreenFunctions.jl.
• Reformat function signatures in RetardedGreenFunction for readability.
• Use scalartype(ed) instead of scalartype(Ω) in GreenFunction for consistency.

Dependencies

• Add Logging dependency to Project.toml.

v0.3.1

ExactDiagonalization v0.3.1

Diff since v0.3.0

Release Notes for ExactDiagonalization v0.3.1

Features

-Makie plotting support: Added ExactDiagonalizationMakieExt extension providing Makie-based plotting for StaticChargeStructureFactor, StaticSpinStructureFactor, and SpinCoherentStateProjection. Tests now run both Plots and Makie backends with separate output files.

Bug Fixes

• GreenFunction sector calculation: Fixed incorrect sector computation by using adjoint(operator) instead of raw operator. Also switched to OrderedDict to preserve operator ordering.

v0.3.0

ExactDiagonalization v0.3.0

Diff since v0.2.0

ExactDiagonalization v0.3.0 Release Notes

Version Information

• Version: v0.3.0
• Release Date: 2026-03-12
• Julia Version: 1.10 - 1.12

Dependency Updates

• QuantumLattices: 0.14.2
• RecipesBase: Converted to weakdeps, now using extension mechanism

---

Breaking Changes

• See new features

New Features

BandLanczos Module

• Added new BandLanczos module with BandLanczosIterator and BandLanczosFactorization types that extend KrylovKit's BlockLanczos with optional control over keeping Krylov basis vectors

Green Functions

• Added GreenFunction and RetardedGreenFunction types for calculating Green's functions with BandLanczosMethod and ExactMethod methods

Quantum Number System

• QuantumNumbers and related functions migrated from QuantumLattices
• Added action of QuantumOperator on AbelianQuantumNumber

---

Bug Fixes

• Fixed various documentation and typo issues

Closed issues:

• Low cpu usage in 4*4 case for Fermi Hubbard Model (#9)

v0.2.0

ExactDiagonalization v0.2.0

Diff since v0.1.7

Breaking changes

• Redefine the construction function of BinaryBases, which uses quantum numbers, such asℕ, 𝕊ᶻ, 𝕊ᶻ ⊠ ℕ, ℕ ⊠ 𝕊ᶻ or none to initialize.
• Rename SpinBases to AbelianBases, which is in principle not restricted to spin systems any more, and uses quantum numbers, such as 𝕊ᶻ or none to initialize.
• Generic interface Sector has been modified in accordance with BinaryBases and AbelianBases.
• Redefine the construction function of ED, which uses quantum numbers, such as ℕ, 𝕊ᶻ, 𝕊ᶻ ⊠ ℕ, ℕ ⊠ 𝕊ᶻ or none to initialize.
• Remove TargetSpace.
• BinaryBasisRange, SectorFilter and basistype are no longer exported.

New features

• Add EDEigen and EDEigenData.
• Add GroundStateExpectation and GroundStateExpectationData.
• Add StaticTwoPointCorrelator and StaticTwoPointCorrelatorData.
• Add SpinCoherentState, SpinCoherentStateProjection and SpinCoherentStateProjectionData.
• Add prepare!(::ED; timer), prepare!(::Algorithm{<:ED}) and release!(::Union{ED, Algorithm{<:ED}; gc) for more flexible memory control.
• Add release keyword argument to matrix(::Union{ED, Algorithm{<:ED}}, args...; kwargs...) and eigen(::Union{ED, Algorithm{<:ED}}, args...; kwargs...) so that the memory cached to construct the sparse matrix representation of the Hamiltonian can be released immediately after the construction.

Merged pull requests:

• spin coherent states (#7) (@qscdesz)
• Green function (#8) (@ZongYongyue)

v0.1.7

ExactDiagonalization v0.1.7

Diff since v0.1.6

v0.1.6

ExactDiagonalization v0.1.6

Diff since v0.1.5

v0.1.5

ExactDiagonalization v0.1.5

Diff since v0.1.4

v0.1.4

ExactDiagonalization v0.1.4

Diff since v0.1.3

Merged pull requests:

• fix bug of matrix (#4) (@wwangnju)