Abstract
In this work we study the dynamics of the Schrödinger–Newton (SN) equation upon different choices of initial conditions. Setting up superpositions of Gaussian-like wave packages, a very rich behavior for the critical mass as a function of the parameters of the problem is observed. We find that, for certain values of the parameters, the critical mass is smaller than the critical mass for the system whose initial condition is a single Gaussian wave package, which was the situation previously investigated in the literature. This opens a possibility that more complex initial conditions could in fact produce a significant decrease in the value of the critical mass, which could imply that the SN approach could be tested experimentally. Our conclusions rely on both numerical and analytic estimates. Furthermore, a detailed numerical study is carried out in order to investigate finite-size effects on the simulations, refining earlier results already published. In order to facilitate the reproducibility of our results, a detailed description of our numerical methods has been included in the presentation.
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Notes
Any list of references on this is doomed to be very incomplete, but we mention the following works. For standard treatments of String Theory and its relation to the quantization of the gravitational field, see [30, 45], or [5] for a more recent monograph. Attempts at constructing semi-realistic models out of String Theory and the related problems of stabilization and de Sitter vacua can be found in [2, 9, 16, 19–22, 29, 33, 53] and references therein, while connections with cosmology are explored in [4] and their references. For approaches based on Loop Quantum Gravity, see [48, 49], or the recent survey [13], and references therein. For approaches based on Twistors, see [40, 41, 44] and references therein.
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Acknowledgments
Marcelo M. Disconzi is partially supported by NSF award 1305705. Marion Silvestrini, leonardo G. Brunnet and Carolina Brito thank the Brazilian funding agencies CNPq, Capes and Fapergs. We thank the supercomputing laboratory at IF-UFRGS and at New York University, where the simulations were run, for computer time.
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Silvestrini, M., Brunnet, L.G., Disconzi, M. et al. Initial condition dependence and wave function confinement in the Schrödinger–Newton equation. Gen Relativ Gravit 47, 129 (2015). https://doi.org/10.1007/s10714-015-1975-4
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DOI: https://doi.org/10.1007/s10714-015-1975-4