That's wrong. The classification of each exported item has to be declared by the sender. Exemptions should also be declared as an ECCN number (there are various ECCN numbers designed exactly for that).
Without ECCN the sender fails basic Export Compliance checks.
I count more than 40 QC simulator projects. All open source. There is an abundance of quantum computer (QC) simulators, as opposed to a paucity of quantum field theory (QFT) simulators (most of them written in Fortran, yuck).
What you have linked is just bog-standard entanglement simulations. There are a dozen free software apps to do that. It's basically just linear matrix algebra with complex numbers.
What the parent meant was real particle simulation, for example simulating the collision between two electrons or computing the dipole moment of a muon, from fundamental standard model constants. It requires numerically solving 12 dimensional PDE's. That's much more complicated than entanglement simulations.
That's wrong. The classification of each exported item has to be declared by the sender. Exemptions should also be declared as an ECCN number (there are various ECCN numbers designed exactly for that).
Without ECCN the sender fails basic Export Compliance checks.