Non-locality and Gauge Freedom in Deutsch and Hayden’s Formulation of Quantum Mechanics
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Deutsch and Hayden have proposed an alternative formulation of quantum mechanics which is completely local. We argue that their proposal must be understood as having a form of ‘gauge freedom’ according to which mathematically distinct states are physically equivalent. Once this gauge freedom is taken into account, their formulation is no longer local.
Keywordsnonlocality gauge dependence Deutsch–Hayden representation
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