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- W4226380978 abstract "By quantising the background as well as the perturbations in a simple one fluid model, we show that there exists an ambiguity in the choice of relevant variables, potentially leading to incompatible observational physical predictions. In a classical or quantum inflationary background, the exact same canonical transformations lead to unique predictions, so the ambiguity we put forward demands a semiclassical background with a sufficiently strong departure from classical evolution. The latter condition happens to be satisfied in bouncing scenarios, which may thus be having predictability issues. Inflationary models could evade such a problem because of the monotonic behavior of their scale factor; they do, however, initiate from a singular state which bouncing scenarios aim at solving." @default.
- W4226380978 created "2022-05-05" @default.
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- W4226380978 date "2021-11-04" @default.
- W4226380978 modified "2023-09-27" @default.
- W4226380978 title "Unitarily inequivalent quantum cosmological bouncing models" @default.
- W4226380978 hasPublicationYear "2021" @default.
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