Perturbations and the future conformal boundary
The concordance model of cosmology predicts a universe which finishes in a finite amount of conformal time at a future conformal boundary. We show that for particular cases we study, the background variables and perturbations may be analytically continued beyond this boundary and that the "end...
| Main Authors: | , , , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
American Physical Society
2022
|
| _version_ | 1826309392922836992 |
|---|---|
| author | Lasenby, AN Handley, WJ Bartlett, DJ Negreanu, CS |
| author_facet | Lasenby, AN Handley, WJ Bartlett, DJ Negreanu, CS |
| author_sort | Lasenby, AN |
| collection | OXFORD |
| description | The concordance model of cosmology predicts a universe which finishes in a finite amount of conformal time at a future conformal boundary. We show that for particular cases we study, the background variables and perturbations may be analytically continued beyond this boundary and that the "end of the universe"is not necessarily the end of their physical development. Remarkably, these theoretical considerations of the end of the universe might have observable consequences today: perturbation modes consistent with these boundary conditions have a quantized power spectrum which may be relevant to features seen in the large scale cosmic microwave background. Mathematically these cosmological models may either be interpreted as a palindromic universe mirrored in time, a reflecting boundary condition, or a double cover, but are identical with respect to their observational predictions and stand in contrast to the predictions of conformal cyclic cosmologies. |
| first_indexed | 2024-03-07T07:33:30Z |
| format | Journal article |
| id | oxford-uuid:8019620e-f9c3-41e5-a53b-0b121fada9fa |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T07:33:30Z |
| publishDate | 2022 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:8019620e-f9c3-41e5-a53b-0b121fada9fa2023-02-20T11:54:08ZPerturbations and the future conformal boundaryJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:8019620e-f9c3-41e5-a53b-0b121fada9faEnglishSymplectic ElementsAmerican Physical Society2022Lasenby, ANHandley, WJBartlett, DJNegreanu, CSThe concordance model of cosmology predicts a universe which finishes in a finite amount of conformal time at a future conformal boundary. We show that for particular cases we study, the background variables and perturbations may be analytically continued beyond this boundary and that the "end of the universe"is not necessarily the end of their physical development. Remarkably, these theoretical considerations of the end of the universe might have observable consequences today: perturbation modes consistent with these boundary conditions have a quantized power spectrum which may be relevant to features seen in the large scale cosmic microwave background. Mathematically these cosmological models may either be interpreted as a palindromic universe mirrored in time, a reflecting boundary condition, or a double cover, but are identical with respect to their observational predictions and stand in contrast to the predictions of conformal cyclic cosmologies. |
| spellingShingle | Lasenby, AN Handley, WJ Bartlett, DJ Negreanu, CS Perturbations and the future conformal boundary |
| title | Perturbations and the future conformal boundary |
| title_full | Perturbations and the future conformal boundary |
| title_fullStr | Perturbations and the future conformal boundary |
| title_full_unstemmed | Perturbations and the future conformal boundary |
| title_short | Perturbations and the future conformal boundary |
| title_sort | perturbations and the future conformal boundary |
| work_keys_str_mv | AT lasenbyan perturbationsandthefutureconformalboundary AT handleywj perturbationsandthefutureconformalboundary AT bartlettdj perturbationsandthefutureconformalboundary AT negreanucs perturbationsandthefutureconformalboundary |