Penrose’s Cyclic Universe
John Rosendal Nielsen
PDF (Dansk)

Keywords

Roger Penrose
Conformal Cyclic Cosmology
Kosmologi

How to Cite

Nielsen, J. R. (2024). Penrose’s Cyclic Universe. KVANT, 35(1). https://doi.org/10.7146/kvant.167834

Abstract

Roger Penrose er kendt for sin dybe indflydelse på relativitetsteori og sorte huller – men i denne artikel står hans kosmologiske spekulationer i centrum. John Rosendal Nielsen introducerer "Conformal Cyclic Cosmology" (CCC), en kontroversiel model hvor universet gennemgår uendelige cyklusser, hver adskilt af et Big Bang-lignende skifte kaldet en æon. Artiklen gennemgår de matematiske hovedideer bag CCC, herunder konform geometri og grænsetænkning, og diskuterer hvordan Penrose håber at forbinde det allertidligste univers med det allerseneste via en slags geometrisk "kompression" af uendelig tid. Der redegøres også for, hvordan Penrose og Gurzadyan har forsøgt at finde empiriske spor i kosmisk mikrobølgebaggrund (CMB), især cirkulære mønstre kendt som Hawking ringe.

https://doi.org/10.7146/kvant.167834
PDF (Dansk)

References

[1] A Big Cosmological Mystery: Discovery of a second ultra-large structure in distant space further challenges what we understand about the universe. Press Release University of Central Lancashire, 11 January 2024. https://www.uclan.ac.uk/news/big-ring-in-the-sky

[2] R. Penrose (2016) "Fashion, Faith and Fantasy in the New Physics of the Universe", Princeton University Press.

https://doi.org/10.1515/9781400880287

[3] R. Penrose (2010) "Cycles of Time", The Bodley Head, London.

[4] R. Howl, R. Penrose and I. Fuentes (2019) "Exploring the unification of quantum theory and general relativity with a Bose-Einstein condensate", New Journal of Physics, vol. 21, page 043047.

https://doi.org/10.1088/1367-2630/ab104a

[5] D. An, K. A. Meissner, P. Nurowski and R. Penrose (2020) "Apparent evidence for Hawking points in the CMB Sky", Monthly notices of the Royal Astronomical Society, vol. 495, page 3403-3408.

https://doi.org/10.1093/mnras/staa1343

[6] S. Hossenfelder (2018) "Lost in Math", Basic Books, New York.

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