any(abs(..) > tol) much faster than calculating the norm in
any(abs(..) > tol) much faster than calculating the norm in

qutip/qutip,cgranade/qutip,zasdfgbnm/qutip,anubhavvardhan/qutip,cgranade/qutip,qutip/qutip,zasdfgbnm/qutip,anubhavvardhan/qutip