expound a little on non markovianity

references.bib

@@ -1647,3 +1647,19 @@
   publisher =    {North-Holland},
   doi =          {10.1016/0370-1573(88)90023-3}
 }
+
+@article{Link2022Feb,
+  author =       {Link, Valentin and Strunz, Walter T. and Luoma,
+                  Kimmo},
+  title =        {{Non-Markovian Quantum Dynamics in a Squeezed
+                  Reservoir}},
+  journal =      {Entropy},
+  volume =       24,
+  number =       3,
+  pages =        352,
+  year =         2022,
+  month =        feb,
+  issn =         {1099-4300},
+  publisher =    {Multidisciplinary Digital Publishing Institute},
+  doi =          {10.3390/e24030352}
+}

src/num_results.tex

@@ -1277,7 +1277,16 @@ dependence of the dynamics upon the shape of the whole spectral
 density.
 
 Note that the short time behaviour discussed here can usually not be
-resolved by GKSL dynamics.
+resolved by GKSL dynamics. This is due to the fact, that the bath
+timescale \(\sim 1/ω_{c}\) must be by far the shortest
+timescale. Another demonstration of this fact is given in
+\cite{Link2022Feb}, where Markovian dynamics are compared with the
+Redfield and exact Dynamics for the spin-boson model coupled to a
+squeezed bath. As in \cite{Xu2022Mar}, the Redfield description is
+found to be adequate for weak coupling. This is due to the fact, that
+the Redfield master equation does not require the secular
+approximation, but only weak coupling and can therefore capture
+non-Markovian dynamics.
 
 \paragraph{Initial Slip}
 \begin{figure}[htp]