Matthias Troyer wrote:
Indeed - the QMC codes cannot do fermions
I lost my hope for a moment. But... The Hamiltonian is expressed in terms of spin operators, which are second order, i.e. bosonic. Hence, the fermionic nature of the site is internal only and completely irrelevant. Your check is simply too strict. Please let me know how to fix this problem.
Cezary Sliwa