Commit 4943b0b4 authored by Mccaskey, Alex's avatar Mccaskey, Alex
Browse files

fix bug where gradient based vqe went to grab observable identity term but there is none 



Signed-off-by: Mccaskey, Alex's avatarAlex McCaskey <mccaskeyaj@ornl.gov>
parent ded43a8c

runtime/objectives/vqe/vqe.cpp

+1 −1
Original line number Diff line number Diff line
@@ -96,7 +96,7 @@ public: 
          xacc::getService<xacc::AlgorithmGradientStrategy>(

              options.getString("gradient-strategy"));



      if (gradient_strategy->isNumerical()) {

      if (gradient_strategy->isNumerical() && observable->getIdentitySubTerm()) {

        gradient_strategy->setFunctionValue(

            val - std::real(observable->getIdentitySubTerm()->coefficient()));

      }