Avoid deep-copying the ansatz

Qiskit · Sep 28, 2022 · 40ba702 · 40ba702
1 parent 8e47ab9
commit 40ba702
Showing 1 changed file with 1 addition and 2 deletions.
diff --git a/qiskit/algorithms/minimum_eigensolvers/adapt_vqe.py b/qiskit/algorithms/minimum_eigensolvers/adapt_vqe.py
@@ -200,7 +200,6 @@ def compute_minimum_eigenvalue(
             raise TypeError("The AdaptVQE ansatz must be of the EvolvedOperatorAnsatz type.")
 
         # Overwrite the solver's ansatz with the initial state
-        solver_ansatz = copy.deepcopy(self.solver.ansatz)
         self._tmp_ansatz = self.solver.ansatz
         self._excitation_pool = self._tmp_ansatz.operators
         self.solver.ansatz = self._tmp_ansatz.initial_state
@@ -269,7 +268,7 @@ def compute_minimum_eigenvalue(
             result.aux_operators_evaluated = aux_values
 
         logger.info("The final energy is: %s", str(result.eigenvalue))
-        self.solver.ansatz = solver_ansatz
+        self.solver.ansatz.operators = self._excitation_pool
         return result