v0.2.2

TensorKitTensors v0.2.2

Diff since v0.2.1

Simplify construction of t-J operators by projecting corresponding Hubbard operators.

Merged pull requests:

• Update code style badge to Runic (#29) (@Yue-Zhengyuan)
• Get t-J operators from Hubbard (#30) (@Yue-Zhengyuan)
• CompatHelper: bump compat for TensorKit to 0.15, (keep existing compat) (#31) (@github-actions[bot])

v0.2.1

TensorKitTensors v0.2.1

Diff since v0.2.0

Various small fixes and some support for SU2 x SU2 implementations of Hubbard operators

Merged pull requests:

• Fix hubbard_space for SU2Irrep, U1Irrep and add tests (#23) (@lkdvos)
• Add casimir function for SU2Irrep (#24) (@lkdvos)
• Hubbard SU(2) x SU(2) implementations (#25) (@lkdvos)
• Runic formatter (#26) (@lkdvos)
• Change f_min_f_min convention (#27) (@Yue-Zhengyuan)
• Bump actions/checkout from 4 to 5 (#28) (@dependabot[bot])

Closed issues:

• Wrong hubbard_space for SU2Irrep x U1Irrep symmetry (#22)

v0.2.0

TensorKitTensors v0.2.0

Diff since v0.1.0

v0.2.0 contains some breaking changes in the form of convention changes, in particular:

All operators now have naming conventions according to flavour_mod or flavour_mod_flavour_mod, where flavour represents the particle type and mod represents the operator type.

• The bosonic operators now get symbol b instead of a (e.g. a_plus became b_plus)
• The spinless fermion operators now get symbol f instead of c
• The combination of an up and down spinful fermion gets symbol e
• The spin operators follow the above convention (e.g. S_xx became S_x_S_x)

Additionally, we altered the convention of some of the conventions of the fermionic operators, that previously had an odd minus sign in them: eg u_min_u_plus used to be defined as adjoint(u_plus_u_min), but now gets the additional minus sign. Because of this, the hopping operator that used to be e_plus_e_min + e_min_e_plus now became e_plus_e_min - e_min_e_plus. In order to avoid having to deal with these problems, the hopping operators are now also explicitly added and exported. (e.g. f_hopping, e_hopping, etc)

Merged pull requests:

• [Change] Switch c_min_c_plus conventions (#15) (@sanderdemeyer)
• Yet Another TensorKitTensors Convention Change (#16) (@sanderdemeyer)
• Reduce unnecessary manual definitions in TJOperators (#18) (@Yue-Zhengyuan)
• Add spin and singlet operators to HubbardOperators (#19) (@Yue-Zhengyuan)
• Add u_min_u_min, d_min_d_min for tJ/Hubbard (#21) (@Yue-Zhengyuan)

Closed issues:

• TagBot trigger issue (#14)
• Docstring out of date for fermionic x_min_x_plus operators (#17)

v0.1.0

What's Changed

• CompatHelper: bump compat for TensorKit to 0.14, (keep existing compat) by @github-actions in #1
• Implementation of the Hubbard operators by @sanderdemeyer in #3
• add tj model by @sanderdemeyer in #9
• add SU2 spin symmetry for tj model by @sanderdemeyer in #10
• Add spinless fermions by @sanderdemeyer in #11
• Add tests by @sanderdemeyer in #12
• Update documentation and add automation for previews by @lkdvos in #13

Full Changelog: https://github.com/QuantumKitHub/TensorKitTensors.jl/commits/v0.1.0