Quantum mechanics as a consistency condition on initial and final boundary conditions

Abstract
If the block universe view is correct, the future and the past have similar status and one would expect physical theories to involve final as well as initial boundary conditions. A plausible consistency condition between the initial and final boundary conditions in non-relativistic quantum mechanics leads to the idea that the properties of macroscopic quantum systems, relevantly measuring instruments, are uniquely determined by the boundary conditions. An important element in reaching that conclusion is that preparations and measurements belong in a special class because they involve many subsystems, at least some of which do not form superpositions of their physical properties before the boundary conditions are imposed. It is suggested that the primary role of the formalism of standard quantum mechanics is to provide the consistency condition on the boundary conditions rather than the properties of quantum systems. Expressions are proposed for assigning a set of (unmeasured) physical properties to a quantum system at all times. The physical properties avoid the logical inconsistencies implied by the no-go theorems because they are assigned differently from standard quantum mechanics. Since measurement outcomes are determined by the boundary conditions, they help determine, rather than are determined by, the physical properties of quantum systems.
Keywords Time-symmetric quantum mechanics  Boundary conditions  Advanced action  Block universe
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References found in this work BETA
Ruth Kastner (2004). Weak Values and Consistent Histories in Quantum Theory. Studies in History and Philosophy of Science Part B 35 (1):57-71.
Lawrence S. Schulman (2008). Influence of the Future☆. Studies in History and Philosophy of Science Part B 39 (4):819-829.

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Citations of this work BETA
Joseph Berkovitz (2008). On Predictions in Retro-Causal Interpretations of Quantum Mechanics. Studies in History and Philosophy of Science Part B 39 (4):709-735.
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