I am using the quantum Mathematica package and am trying to do computations that require me to use the outer (tensor) products of Pauli matrices. I would define this as, for example, Subscript[\[Sigma], 2]\[CircleTimes]Subscript[\[Sigma], 3] .
However if I ask Mathematica to compute this, it only finds the matrix product of the two operators, not the outer (tensor) product. Does anyone know of a way to do this calculation with Mathematica still recognizing the operators as Pauli matrices, i.e. rather than writing them in matrix form or in Dirac notation?
KroneckerProduct. So in other words, don't use Mathematica's tensor functions. See also here. – Jens Apr 07 '16 at 15:47