The Inflationary Origin of the Seeds of Cosmic Structure: Quantum Theory and the Need for Novel Physics

Sudarsky, Daniel

doi:10.1007/978-3-319-06349-2_17

Cited by 4 publications

(4 citation statements)

References 21 publications

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“…Such approach is sometimes considered as not viable, but as the discussion illustrated in[57][58][59][60][61][62][63] the arguments are not decisive. In particular, an implementation involving a self-induced collapse seems to be completely viable as far as mathematical consistency and phenomenology are concerned[64,65], and at least when regarding these as effective theories.…”

mentioning

confidence: 99%

Constraining quantum collapse inflationary models with current data: The semiclassical approach

Piccirilli

León

Landau

et al. 2019

Int. J. Mod. Phys. D

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1 In fact, we find that characterizing the problem as the "quantum-to-classical" transition is somewhat misleading. Our posture is that there are no classical or quantum regimes. The fundamental description is always quantum mechanical. However, in some physical systems, there exist certain conditions that allow us to describe specific quantities, to a sufficient accuracy, by their expectation values which are then identified with their classical counterparts.

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confidence: 99%

Constraining quantum collapse inflationary models with current data: The semiclassical approach

Piccirilli

León

Landau

et al. 2019

Int. J. Mod. Phys. D

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“…Let us discuss now how the dynamical reduction of the wave function fits into our general understanding of gravity and its, still incomplete, quantum mechanical characterization (see [85,86] for a more detailed explanation). According to general relativity, gravitation reflects the structure of spacetime itself, whereas quantum theory seems to fit most easily in contexts where this structure is a given one.…”

Section: The Csl Model During Inflationmentioning

confidence: 99%

Eternal inflation and the quantum birth of cosmic structure

León

2017

Eur. Phys. J. C

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We consider the eternal inflation scenario of the slow-roll/chaotic type with the additional element of an objective collapse of the wave function. The incorporation of this new agent to the traditional inflationary setting might represent a possible solution to the quantum measurement problem during inflation, a subject that has not reached a consensus among the community. Specifically, it could provide an explanation for the generation of the primordial anisotropies and inhomogeneities, starting from a perfectly symmetric background and invoking symmetric dynamics. We adopt the continuous spontaneous localization model, in the context of inflation, as the dynamical reduction mechanism that generates the primordial inhomogeneities. Furthermore, when enforcing the objective reduction mechanism, the condition for eternal inflation can be bypassed. In particular, the collapse mechanism incites the wave function, corresponding to the inflaton, to localize itself around the zero mode of the field. Then the zero mode will evolve essentially unperturbed, driving inflation to an end in any region of the Universe where inflation occurred. Also, our approach achieves a primordial spectrum with an amplitude and shape consistent with the one that best fits the observational data.

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“…As noted inSudarsky (2014), this is connected with issues appearing in other approaches, such as the stochastic gravitation program ofHu and Verdaguer (2008).…”

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confidence: 93%

The weight of collapse: dynamical reduction models in general relativistic contexts

Okon¹,

Sudarsky²

2017

Preprint

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Inspired by possible connections between gravity and foundational question in quantum theory, we consider an approach for the adaptation of objective collapse models to a general relativistic context. We apply these ideas to a list of open problems in cosmology and quantum gravity, such as the emergence of seeds of cosmic structure, the black hole information issue, the problem of time in quantum gravity and, in a more speculative manner, to the nature of dark energy and the origin of the very special initial state of the universe. We conclude that objective collapse models offer a rather promising path to deal with all of these issues.

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The Inflationary Origin of the Seeds of Cosmic Structure: Quantum Theory and the Need for Novel Physics

Cited by 4 publications

References 21 publications

Constraining quantum collapse inflationary models with current data: The semiclassical approach

Constraining quantum collapse inflationary models with current data: The semiclassical approach

Eternal inflation and the quantum birth of cosmic structure

The weight of collapse: dynamical reduction models in general relativistic contexts

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