, 'no', or 'only'.</li><br>
<hr>
<a name=pt_density_matrix><li>                 <span style="display:inline-block;background:#EEEEEE;width:400px">               <b>pt_density_matrix</b>  </span>  
<br><br>
<i>Optional</i><br>
Default: no<br><br>
Triggers the calculation of a correlated density matrix within MBPT. Valid choices include: 'no', 'PT2', 'ONE-RING', or 'GW'.</li><br>
<hr>
<a name=rcut_mbpt><li>                 <span style="display:inline-block;background:#EEEEEE;width:400px">               <b>rcu