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Merged
merged 1 commit into from
Oct 13, 2024
Merged

Improve mcsolve performance #265

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13 changes: 9 additions & 4 deletions src/time_evolution/mcsolve.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,7 @@ end
function LindbladJumpAffect!(integrator)
internal_params = integrator.p
c_ops = internal_params.c_ops
c_ops_herm = internal_params.c_ops_herm
cache_mc = internal_params.cache_mc
weights_mc = internal_params.weights_mc
cumsum_weights_mc = internal_params.cumsum_weights_mc
Expand All @@ -33,11 +34,11 @@ function LindbladJumpAffect!(integrator)
ψ = integrator.u

@inbounds for i in eachindex(weights_mc)
mul!(cache_mc, c_ops[i], ψ)
weights_mc[i] = real(dot(cache_mc, cache_mc))
weights_mc[i] = real(dot(ψ, c_ops_herm[i], ψ))
end
cumsum!(cumsum_weights_mc, weights_mc)
collaps_idx = getindex(1:length(weights_mc), findfirst(>(rand(traj_rng) * sum(weights_mc)), cumsum_weights_mc))
r = rand(traj_rng) * sum(weights_mc)
collaps_idx = getindex(1:length(weights_mc), findfirst(>(r), cumsum_weights_mc))
mul!(cache_mc, c_ops[collaps_idx], ψ)
normalize!(cache_mc)
copyto!(integrator.u, cache_mc)
Expand Down Expand Up @@ -237,13 +238,17 @@ function mcsolveProblem(
jump_times = Vector{Float64}(undef, jump_times_which_init_size)
jump_which = Vector{Int16}(undef, jump_times_which_init_size)

c_ops_data = get_data.(c_ops)
c_ops_herm_data = map(op -> op' * op, c_ops_data)

params2 = (
expvals = expvals,
e_ops_mc = e_ops2,
is_empty_e_ops_mc = is_empty_e_ops_mc,
progr_mc = ProgressBar(length(t_l), enable = false),
traj_rng = rng,
c_ops = get_data.(c_ops),
c_ops = c_ops_data,
c_ops_herm = c_ops_herm_data,
cache_mc = cache_mc,
weights_mc = weights_mc,
cumsum_weights_mc = cumsum_weights_mc,
Expand Down
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