Merge pull request #60 from EbertPaul/expect_exact_bug

let expect() with alg=exact recognise coefficients

Author: JoeyT1994

Project.toml

@@ -3,7 +3,7 @@ uuid = "4de3b72a-362e-43dd-83ff-3f381eda9f9c"
 license = "MIT"
 authors = ["JoeyT1994 <jtindall@flatironinstitute.org>", "MSRudolph <manuel.rudolph@web.de>", "and contributors"]
 description = "A Julia package for quantum simulation with tensor networks of near-arbritrary topology."
-version = "0.3.0"
+version = "0.3.1"
 
 [deps]
 Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"

src/expect.jl

@@ -18,7 +18,7 @@ function expect(
         ψOψ_tensors = norm_factors(ψ, collect(vertices(ψ)); op_strings = op_string_f)
         numer_seq = contraction_sequence(ψOψ_tensors; contraction_sequence_kwargs...)
         numer = contract(ψOψ_tensors; sequence = numer_seq)[]
-        push!(out, numer / denom)
+        push!(out, coeff * (numer / denom))
     end
     return out
 end