From 64ffb7b9cedc953bf11c6914019a319b4dfb5a14 Mon Sep 17 00:00:00 2001
From: Renato Mello <renato.msf@gmail.com>
Date: Tue, 12 Mar 2024 15:38:43 +0000
Subject: [PATCH] Update src/qibo/backends/numpy.py

---
 src/qibo/backends/numpy.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/qibo/backends/numpy.py b/src/qibo/backends/numpy.py
index 7eb2907aa1..ce7eb49e15 100644
--- a/src/qibo/backends/numpy.py
+++ b/src/qibo/backends/numpy.py
@@ -764,7 +764,7 @@ def calculate_expectation_density_matrix(self, hamiltonian, state, normalize):
         ev = self.np.real(self.np.trace(self.cast(hamiltonian @ state)))
         if normalize:
             norm = self.np.real(self.np.trace(state))
-            ev = ev / norm
+            ev /= norm
         return ev
 
     # TODO: remove this method