15 Jun '10 08:21>
This discussion came up in another thread "Time paradox". The question is about the observation paradox. A molecule can be in a superposition of states. However, as soon as we measure it, it will
always collapse in one of the states. Does the observer has to be a human(or animal) or can a machine just as well do the measurement?
I would say that if the machine and the specific molecule are completely isolated from the outside world the whole system should be described by a single wavefunction: i.e. i) Molecule is in state A and machine measures state A or ii) Molecule is in state B and machine measures state B.
As soon a we try to read out the output of the machine the whole thing collapses. That is the wavefunction describing the molecule and the machine as a whole. This suggest that the collapse only occurs by an observation of a conscious being.
see also http://en.wikipedia.org/wiki/Consciousness_causes_collapse
always collapse in one of the states. Does the observer has to be a human(or animal) or can a machine just as well do the measurement?
I would say that if the machine and the specific molecule are completely isolated from the outside world the whole system should be described by a single wavefunction: i.e. i) Molecule is in state A and machine measures state A or ii) Molecule is in state B and machine measures state B.
As soon a we try to read out the output of the machine the whole thing collapses. That is the wavefunction describing the molecule and the machine as a whole. This suggest that the collapse only occurs by an observation of a conscious being.
see also http://en.wikipedia.org/wiki/Consciousness_causes_collapse