Skip to content

Dispatch environment_alg on OperatorStyle #397

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
AFeuerpfeil wants to merge 3 commits into
base: main
Choose a base branch
from
Open

Dispatch environment_alg on OperatorStyle #397

Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
ec9da6d
dispatch environment_alg on `OperatorStyle`
AFeuerpfeil Feb 28, 2026
dd08d62
format
AFeuerpfeil Feb 28, 2026
2faa4d1
fix MethodError for quasi particles
AFeuerpfeil Mar 2, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
16 changes: 12 additions & 4 deletions src/environments/abstract_envs.jl
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -69,22 +69,30 @@ end
Determine an appropriate algorithm for computing the environments, based on the given `kwargs...`.
"""
function environment_alg(
::Union{InfiniteMPS, MultilineMPS}, ::Union{InfiniteMPO, MultilineMPO},
::Union{InfiniteMPS, MultilineMPS};
below, operator, above; kwargs...
)
return environment_alg(
GeometryStyle(below, operator, above), OperatorStyle(operator),
below, operator, above; kwargs...
)
end
function environment_alg(
::InfiniteChainStyle, ::MPOStyle, below, operator, above;
tol = Defaults.tol, maxiter = Defaults.maxiter, krylovdim = Defaults.krylovdim,
verbosity = Defaults.VERBOSE_NONE, eager = true
verbosity = Defaults.VERBOSE_NONE, eager = true,
)
return Arnoldi(; tol, maxiter, krylovdim, verbosity, eager)
end
function environment_alg(
below, ::InfiniteMPOHamiltonian, above;
::InfiniteChainStyle, ::HamiltonianStyle, below, operator, above;
tol = Defaults.tol, maxiter = Defaults.maxiter, krylovdim = Defaults.krylovdim,
verbosity = Defaults.VERBOSE_NONE
)
max_krylovdim = ceil(Int, dim(left_virtualspace(above, 1)) * dim(left_virtualspace(below, 1)))
return GMRES(; tol, maxiter, krylovdim = min(max_krylovdim, krylovdim), verbosity)
end
function environment_alg(
::InfiniteChainStyle, ::MPOStyle,
::Union{InfiniteQP, MultilineQP}, ::Union{InfiniteMPO, MultilineMPO},
::Union{InfiniteQP, MultilineQP};
tol = Defaults.tol, maxiter = Defaults.maxiter, krylovdim = Defaults.krylovdim,
Expand Down