refactor expect to avoid calling evolve!

bsc-quantic · Nov 2, 2024 · e1970fd · e1970fd
1 parent 4849c69
commit e1970fd
Showing 1 changed file with 1 addition and 5 deletions.
diff --git a/src/Ansatz/Ansatz.jl b/src/Ansatz/Ansatz.jl
@@ -142,11 +142,7 @@ end
 
 overlap(a::AbstractAnsatz, b::AbstractAnsatz) = contract(merge(a, copy(b)'))
 
-function expect(ψ::AbstractAnsatz, observable; bra=copy(ψ))
-    ϕ = bra
-    evolve!(ϕ, observable)
-    return overlap(ϕ, ψ)
-end
+expect(ψ::AbstractAnsatz, observable; bra=copy(ψ)) = contract(merge(ψ, observable, bra'))
 
 function expect(ψ::AbstractAnsatz, observables::AbstractVecOrTuple; bra=copy(ψ))
     sum(observables) do observable