# Spacetime Quantum Mechanics and the Quantum Mechanics of Spacetime

@article{Hartle1993SpacetimeQM, title={Spacetime Quantum Mechanics and the Quantum Mechanics of Spacetime}, author={James B. Hartle}, journal={arXiv: General Relativity and Quantum Cosmology}, year={1993} }

These are the author's lectures at the 1992 Les Houches Summer School, "Gravitation and Quantizations". They develop a generalized sum-over-histories quantum mechanics for quantum cosmology that does not require either a preferred notion of time or a definition of measurement. The "post-Everett" quantum mechanics of closed systems is reviewed. Generalized quantum theories are defined by three elements (1) the set of fine-grained histories of the closed system which are its most refined possible…

## 282 Citations

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It can be argued that RH compares favourably with other proposed interpretations of quantum mechanics in that it resolves the measurement problem while retaining an essentially classical worldview without parallel universes, a framework-dependent reality or action-at-a-distance.

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In it's usual presentation, classical mechanics appears to give time a very special role. But it is well known that mechanics can be formulated so as to treat the time variable on the same footing as…

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