Functions CalcMetricTensor and CalcExpecPauliStringDerivs are possibly mishandling arbitrarily parameterised Kraus maps. For example, Deph[x] and Kraus[{ Sqrt[1 - x] IdentityMatrix[2], Sqrt[x] PauliMatrix[3]}] admit different values from
CalcMetricTensor[InitPlusState @ CreateDensityQureg[1], OP, {x -> .4}]
will differ. Check!
Functions
CalcMetricTensorandCalcExpecPauliStringDerivsare possibly mishandling arbitrarily parameterised Kraus maps. For example,Deph[x]andKraus[{ Sqrt[1 - x] IdentityMatrix[2], Sqrt[x] PauliMatrix[3]}]admit different values fromwill differ. Check!