state; we are not yet sure of when it is
 advantageous.
</li>
<li><b>crank_nicholson_src_mem</b>:  Crank-Nicholson propagator with source and memory term for transport
 calculations.
</li>
</ul>
</p><hr width='30%' align='left'/>


<p><b><a name='TDStepsWithSelfConsistency'></a>TDStepsWithSelfConsistency</b>
<br/><i>Section</i>: Time-Dependent::Propagation
<br/><i>Type</i>: integer
<br/><i>Default</i>: 3
<br/><br> Since the KS propagator is non-linear, each propagation step
 should be performed self-consist