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Testing the mean field theory of scalar field dark matter
by Andrew Eberhardt, Alvaro Zamora, Michael Kopp, and Tom Abel
This Submission thread is now published as
Submission summary
| Authors (as registered SciPost users): | Andrew Eberhardt |
| Submission information | |
|---|---|
| Preprint Link: | scipost_202209_00066v1 (pdf) |
| Date accepted: | 2023-04-24 |
| Date submitted: | 2022-09-30 12:15 |
| Submitted by: | Eberhardt, Andrew |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 14th International Conference on Identification of Dark Matter (IDM2022) |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approach: | Computational |
Abstract
Scalar field dark matter offers an interesting alternative to the traditional WIMP dark matter picture. Astrophysical and cosmological simulations are useful to constraining the mass of the dark matter particle in this model. This is particularly true at low mass where the wavelike nature of the dark matter particle manifests on astrophysical scales. These simulations typical use a classical field approximation. In this work, we look at extending these simulations to include quantum corrections. We look into both the ways in which large corrections impact the predictions of scalar field dark matter, and the timescales on which these corrections grow large. Corrections tend to lessen den- sity fluctuations and increase the effect of “quantum pressure". During collapse, these corrections grow exponentially, quantum corrections would become important in about ∼ 30 dynamical times. This implies that the predictions of classical field simulations may differ from those with quantum corrections for systems with short dynamical times.
Published as SciPost Phys. Proc. 12, 058 (2023)
Reports on this Submission
Anonymous Report 2 on 2022-10-23 (Invited Report)
- Cite as: Anonymous, Report on arXiv:scipost_202209_00066v1, delivered 2022-10-23, doi: 10.21468/SciPost.Report.5963
Strengths
1. This manuscript tries to take into account quantum corrections in fuzzy dark matter evolution, beyond the usual classical field approximation.
2. With both simulations and analytical calculations, the result suggests that there exists a non-linear growth regime where quantum corrections grow exponentially.
Weaknesses
Most of the study is done within a simplified one-dimensional framework, which may change in our real Universe.
Moreover, there are typos that need to be corrected in later editing, such as "This is implies that", "of the each stream" and ",." in Eq.(6), among others.
Report
The submission is concise, well-written. And the results are tentative, yet quite encouraging. Thus, it meets the criteria of SciPost Physics Proceedings, and should be published here.