Added the bug test case

add_qcor_compile_and_exe_test(qrt_qpu_lambdas_in_loop qpu_lambda/deuteron_lambda.cpp)

add_qcor_compile_and_exe_test(qrt_qpu_lambda_deuteron qpu_lambda/deuteron_vqe.cpp)

add_qcor_compile_and_exe_test(qrt_qpu_lambda_objfunc qpu_lambda/deuteron_vqe_obj_func.cpp)

add_qcor_compile_and_exe_test(qrt_qpu_lambda_hadamard_test ctrl-gates/hadamard_test.cpp)

# Arithmetic tests

add_qcor_compile_and_exe_test(qrt_qpu_arith_adder arithmetic/simple.cpp)

#include <qcor_hadamard_test>

using FO = FermionOperator;

int main() {

  std::vector<FermionOperator> exp_args{

      -4 * adag(0) * a(0) - 4 * adag(2) * a(2) +

          8 * adag(0) * a(0) * adag(2) * a(2),

      0.01 * adag(0) * a(1) + .01 * adag(3) * a(2) + .01 * adag(1) * a(0) +

          .01 * adag(2) * a(3)};

  std::vector<double> trot_params{1.0, 1, 3};

  auto sp = qpu_lambda([](qreg q) {

    X(q[0]);

    X(q[1]);

  });

  auto unitary = qpu_lambda(

      [&](qreg q) {

        auto dt = trot_params[0];

        auto num_trot_steps = trot_params[1];

        auto tot_trot_steps = trot_params[2];

        double delta_t = dt / num_trot_steps;

        for (auto j : range(tot_trot_steps)) {

          for (auto i : range(num_trot_steps)) {

            exp_i_theta(q, .5 * delta_t, exp_args[0]);

            exp_i_theta(q, delta_t, exp_args[1]);

            exp_i_theta(q, .5 * delta_t, exp_args[0]);

          }

        }

      },

      trot_params, exp_args);

  auto val = qcor::hadamard_test(sp, unitary, 4);

  print(val);

}

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