changed expm(sparse=...) to expm(method=...) where method can be used to select between qutips and scipys expm functions for sparse/dense matrices.
changed expm(sparse=...) to expm(method=...) where method can be used to select between qutips and scipys expm functions for sparse/dense matrices.

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