More_Mitiq

 Mitiq does have a Dynamic Decoupling option, but seems unlike that in Qiskit.

Here, the various gates undergo back and forth rotations. It does affect results. The

code (Merlin), below:

                                                       

A run of the same code without enabling the decoupling:

                                                                       

*     *     *

Also looked up RichardsonFactory from yesterday's code. It is an extrapolation 

method, that sppeds things up.

Richardson extrapolation - Wikipedia