Talk:Pure state

Without a definition of a quantum state vector (the article does'nt exist right now) or a proper definition of a mixed state (the link points to density matrix which mentions mixed state only very briefly) this article here is pretty useless yet. I can't even figure out if the definition depends on the choice of a fixed basis or not. Please help. 84.160.216.232 10:05, 29 October 2006 (UTC)

well, clearly the definition, if it was to make physical sense, cannot be basis-dependent; whether a state is pure cannot depend on the eigenbasis for your measurement. Mct mht 19:46, 4 November 2006 (UTC)