2017 International Workshop: Collapse of the Wave Function

Wavefunction Collapse Not Needed

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    Avatar of Robert Griffiths
    Robert Griffiths

    There is no need for wavefunction collapse in standard quantum mechanics. Probabilities assigned by the Born rule are sufficient. In the case of measurements of a simple sort, Kraus operators can be used to generate a “collapsed state” of the measured system, but this is fully justified using the Born rule and conditional probabilities; no separate collapse postulate is needed. The macroscopic superposition (Schrodinger cat) state that results from unitary time evolution is only a mathematical tool and has no physical relevance, so it does not need to be collapsed (or decohered).

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