Fix errors in CUDA tests (qutip#571)

Author: albertomercurio

Project.toml

@@ -43,7 +43,7 @@ QuantumToolboxMakieExt = "Makie"
 
 [compat]
 ArrayInterface = "6, 7"
-CUDA = "5"
+CUDA = "<5.9"
 ChainRulesCore = "1"
 DiffEqBase = "6"
 DiffEqCallbacks = "4.2.1 - 4"
@@ -53,7 +53,7 @@ FFTW = "1.5"
 GPUArrays = "10, 11"
 Graphs = "1.7"
 IncompleteLU = "0.2"
-KernelAbstractions = "0.9.2"
+KernelAbstractions = "0.9"
 LaTeXStrings = "1.2"
 LinearAlgebra = "1"
 LinearSolve = "2, 3"

src/qobj/superoperators.jl

@@ -179,6 +179,4 @@ liouvillian(H::AbstractQuantumObject{Operator}, Id_cache::Diagonal = I(prod(H.di
 
 liouvillian(H::AbstractQuantumObject{SuperOperator}, Id_cache::Diagonal) = H
 
-function _sum_lindblad_dissipators(c_ops, Id_cache::Diagonal)
-    return sum(op -> lindblad_dissipator(op, Id_cache), c_ops; init = zero(spre(first(c_ops), Id_cache)))
-end
+_sum_lindblad_dissipators(c_ops, Id_cache::Diagonal) = sum(op -> lindblad_dissipator(op, Id_cache), c_ops)