Allow negative time fits for the correlation function

gsuarezr · Sep 23, 2024 · 78fb617 · 78fb617
1 parent adca820
commit 78fb617
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/qutip/core/environment.py b/qutip/core/environment.py
@@ -1819,11 +1819,11 @@ def _fft(f, wMax, tMax):
 
 
 def _cf_real_fit_model(tlist, a, b, c, d=0):
-    return np.real((a + 1j * d) * np.exp((b + 1j * c) * tlist))
+    return np.real((a + 1j * d) * np.exp((b + 1j * c) * np.abs(tlist)))
 
 
 def _cf_imag_fit_model(tlist, a, b, c, d=0):
-    return np.imag((a + 1j * d) * np.exp((b + 1j * c) * tlist))
+    return np.imag((a + 1j * d) * np.exp((b + 1j * c) * np.abs(tlist)))
 
 
 def _default_guess_cfreal(tlist, clist, full_ansatz):