Hi,
when I try to define a complex Hamiltonian (e.g. some extended Heisenberg-model with Sx _and_ Sy=-I/2(Splus-Sminus) couplings to external fields) fulldiag or other ALPS-programs end with the error "can not convert complex number into real one"
Is this a general restriction for ALPS, or did I miss some configuration or compile option? If not - do you know any patch or work-around to enable complex-numbers?
Thanks in advance and greetings, Sebastian