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- W2554461853 abstract "A discrete quantum spin system is presented in which several modern methods of canonical quantum gravity can be tested with promising results. In particular, features of interacting dynamics are analyzed with an emphasis on homogeneous configurations and the dynamical building-up and stability of long-range correlations. Different types of homogeneous minisuperspace models are introduced for the system, including one based on condensate states, and shown to capture different aspects of the discrete system. They are evaluated with effective methods and by means of continuum limits, showing good agreement with operator calculations whenever the latter are available. As a possibly quite general result, it is concluded that an analysis of the building-up of long-range correlations in discrete systems requires non-perturbative solutions of the dynamical equations. Some questions related to stability can be analyzed perturbatively, but suggest that matter couplings may be relevant for this question in the context of quantum cosmology." @default.
- W2554461853 created "2016-11-30" @default.
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- W2554461853 date "2017-04-10" @default.
- W2554461853 modified "2023-10-17" @default.
- W2554461853 title "Minisuperspace models of discrete systems" @default.
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- W2554461853 doi "https://doi.org/10.1103/physrevd.95.086007" @default.
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