v0.12 Roadmap

[lkdvos]

This is a collection of things that together with @leburgel and @VictorVanthilt were decided to include into the very breaking v0.12.
This could then hopefully start as a basis for some kind of changelog, which could become useful.

Naming conventions

Tensors

• AL, AR, AC, C (mps)
• B, X, V (quasiparticle)
• GL, GR, GBL, GBR (environments)
• O, W (operators)

States

• AbstractMPS, FiniteMPS and InfiniteMPS
• FiniteQP, InfiniteQP
• WindowMPS
• MultilineMPS

Operators

• AbstractMPO, FiniteMPO, InfiniteMPO
• AbstractMPOHamiltonian, FiniteMPOHamiltonian, InfiniteMPOHamiltonian
• WindowMPO, WindowMPOHamiltonian
• MultilineMPO

Environments

• AbstractMPSEnvironments, FiniteEnvironments, InfiniteEnvironments
• FiniteQPEnvironments InfiniteQPEnvironments
• WindowEnvironments
• MultilineEnvironments

TODO

• environment rewrite: get rid of "manager" functionality Refactor InfiniteEnvironments and GradientGrassmann #224
• find_groundstate and leading_boundary in terms of fixedpoint
• FiniteMPS current center field Rewrite MPS types to use C instead of CR (and CL) and add ψ.center functionality. #216
• across the board getters/setters
• MPS slicing Add FiniteMPS getindex  #218
• above and below
• virtualspace update left and right_virtualspace #205
• benchmarks
• bumper/allocator support
• Documentation examples fixes
• Documentation upgrades Documentation improvements #226
• reduce exports
• @mpoham
• constructors instead of converters

Bugs

• BlockTensorKit setindex behaviour (example @victor)
• Finite time evolution mpo Revert TaylorCluster Optimizations of #199 #220