Ok, thanks I will wait for his reply then. Mean while I found a working copy of the density operator function in a github fork (repo of addisonc). It just sounded from the paper as if it was included in Sympy already.
Now I am stuck trying to use the represent method on the resulting density operator to find out whether i can represent it in a nicer way using another basis state. I am trying to use represent on a matrix with basis=the two basis vectors, but it either throws exception or just outputs the input. how do I input a correctly formatted basis? The example in the docstrings uses an operator, but I do not have the corresponding operator just the basis kets/vectors. Ideas, anyone? (I am hoping that be posing a lot of questions and providing at least part of the answers here myself that this will serve as a guide for others) -Hans On 20 Sep., 16:30, Ondřej Čertík <[email protected]> wrote: > Hi Hans, > > On Tue, Sep 20, 2011 at 6:27 AM, Hans Harhoff Andersen > > <[email protected]> wrote: > > that's ok. I found a way around the problem for now by manually typing > > out explicitly what i mean. > > whenever the quantum folks take a look at this I'd also like to aks > > where the functions density and reduced_density are defined. (They are > > mentioned in the paper by Cugini) but I can't find them in the version > > of sympy I have 0.7.0 (I just downloaded the git version but I can't > > find it there either). > > Thanks for your interest. The best is to ask Brian about this. I > already sent him an email yesterday, so let's wait a few days. > > Ondrej -- You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/sympy?hl=en.
