- 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. © Springer Science+Business Media, LLC 2007.
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Non-locality and gauge freedom in Deutsch and Hayden's formulation of quantum mechanics
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