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• W3102254163 abstract "Relational particle models are useful toy models for quantum cosmology and the problem of time in quantum general relativity. This paper shows how to extend existing work on concrete examples of relational particle models in 1D to include a notion of scale. This is useful as regards forming a tight analogy with quantum cosmology and the emergent semiclassical time and hidden time approaches to the problem of time. This paper shows furthermore that the correspondence between relational particle models and classical and quantum cosmology can be strengthened using judicious choices of the mechanical potential. This gives relational particle mechanics models with analogues of spatial curvature, cosmological constant, dust and radiation terms. A number of these models are then tractable at the quantum level. These models can be used to study important issues (1) in canonical quantum gravity: the problem of time, the semiclassical approach to it and timeless approaches to it (such as the naive Schrödinger interpretation and records theory) and (2) in quantum cosmology, such as in the investigation of uniform states, robustness and the qualitative understanding of the origin of structure formation." @default.
• W3102254163 created "2020-11-23" @default.
• W3102254163 creator A5035254527 @default.
• W3102254163 date "2011-02-25" @default.
• W3102254163 modified "2023-09-26" @default.
• W3102254163 title "Quantum cosmological relational model of shape and scale in 1D" @default.
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• W3102254163 doi "https://doi.org/10.1088/0264-9381/28/6/065011" @default.
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