de.mpg.escidoc.pubman.appbase.FacesBean
English
 
Help Guide Disclaimer Contact us Login
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Cycles in the Multiverse

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons16239

Lehners,  Jean-Luc
Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, Golm, DE;

Locator
There are no locators available
Fulltext (public)

1112.3360
(Preprint), 956KB

PRD85_103509.pdf
(Any fulltext), 564KB

Supplementary Material (public)
There is no public supplementary material available
Citation

Johnson, M. C., & Lehners, J.-L. (2012). Cycles in the Multiverse. Physical Review D, 85(10): 103509. doi:10.1103/PhysRevD.85.103509.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000F-A363-E
Abstract
Eternal inflation is a seemingly generic consequence of theories that give rise to accelerated expansion of the universe and possess multiple vacuum states. Making predictions in an eternally inflating universe is notoriously difficult because one must compare infinite quantities, and a wide variety of regulating procedures yield radically different results. This is the measure problem of eternal inflation. In this paper, we analyze models of eternal inflation which allow for the possibility of cyclic bubble universes: in each bubble, standard cosmological evolution is re-played over and over again. Eternal inflation can generically arise in cyclic models that include a dark energy dominated phase. In such models, several problematic consequences of standard regulating procedures, such as the youngness and Boltzmann Brain problems, are substantially alleviated. We discuss the implications for making predictions in cyclic models, as well as some general implications for understanding the measure problem in eternal inflation.