Editing Full Quantum Process Tomography with Linear inversion (section)

==Further Information==

* [https://arxiv.org/abs/quant-ph/0402166 Maximum likelihood estimation] (also known as MLE or MaxLik) is a popular technique that overcomes the problem that the naive matrix inversion procedure in QPT, when performed on real (i.e., inherently noisy) experimental data, typically leads to an unphysical process matrix.
* The standard approach of process tomography is grossly inaccurate in the case where the states and measurement operators used to interrogate the system are generated by gates that have some systematic error, a situation all but unavoidable in any practical setting. These errors in tomography cannot be fully corrected through oversampling or by performing a larger set of experiments. Hence [[gate set tomography]] was introduced.