solved errors in evolution

qiboteam · Feb 28, 2024 · 23ccda9 · 23ccda9
1 parent d63fef0
commit 23ccda9
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/src/qibo/hamiltonians/hamiltonians.py b/src/qibo/hamiltonians/hamiltonians.py
@@ -248,7 +248,12 @@ def __mul__(self, o):
             if self.backend.np.real(o) >= 0:  # TODO: check for side effects K.qnp
                 r._eigenvalues = o * self._eigenvalues
             elif not self.backend.issparse(self.matrix):
-                r._eigenvalues = o * self._eigenvalues[::-1]
+                if self.backend.__class__.__name__ == "PyTorchBackend":
+                    import torch
+
+                    r._eigenvalues = o * torch.flip(self._eigenvalues, [0])
+                else:
+                    r._eigenvalues = o * self._eigenvalues[::-1]
         if self._eigenvectors is not None:
             if self.backend.np.real(o) > 0:  # TODO: see above
                 r._eigenvectors = self._eigenvectors