7.34.3 Can you answer these questions?

7.34.3.1 Extract the dynamical map from the density matrix

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=256764

I am working on open quantum systems and have been wondering whether there is a way to extract the dynamical map using mathematica. Say we have a density matrix 
$\rho(t) = \begin{bmatrix} p_{00} + (1 -... 
[matrix]
 

asked by dan https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=76229 2 votes

7.34.3.2 NDSolver cannot give precise result for extremely small values

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=256685

I would like to solve an ODE with MMA. The equation is simply the Coulomb law. However, I cannot get a satisfying result: 
... 
[differential-equations] [equation-solving]
 

asked by ZHANG Juenjie https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=44189 1 vote

7.34.3.3 ExampleData problem

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=256686

When running : 
 iris = ExampleData[{"MachineLearning", "FisherIris"}, "Data"]; 
I get the message : 
... 
[probability-or-statistics]
 

asked by djg https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=32449 2 votes