Editing Pocket universe (section)

==Description==
It defines a realm like the one that contains the [[observable universe]] as only one of many inflationary zones.<ref>{{cite web |url=http://www.theosociety.org/pasadena/sunrise/50-00-1/sc-imo17.htm |title=A New Theory of Cosmic Origins |first=I. M. |last=Oderberg |year=2001 |magazine=Sunrise |publisher=Theosophical University Press}} A review of ''The Inflationary Universe'' by Alan H. Guth.</ref><ref>{{cite book|title=The Inflationary Universe|first=Alan |last=Guth|isbn=978-0-201-32840-0|year=1998|url-access=registration|url=https://archive.org/details/inflationaryuniv0000guth}}</ref>

Astrophysicist [[Jean-Luc Lehners]], of the [[Princeton University|Princeton]] Center for Theoretical Science, has argued that an [[Inflation (cosmology)|inflationary]] universe does produce pockets. In his 2012 journal, Lehners wrote about how pocket universes can emerge as a result of [[eternal inflation]]. The mechanisms of inflation within these pocket universes could function in a variety of manners, such as [[Inflation (cosmology)#Slow-roll inflation|slow-roll inflation]], undergoing cycles of [[Physical cosmology|cosmological evolution]], or resembling of the [[Galilean genesis]] or other [[emergent Universe|'emergent' universe]] scenarios. Lehners goes on to discuss which one of these types of universes we live in, and how that is dependent on the measurement of the regulation of infinities inherent in eternal inflation.<ref>{{cite journal|last=Lehners|first=Jean-Luc|date=15 August 2012|title=Eternal Inflation with Noninflationary Pocket Universes|journal=Physical Review D|location=Ridge, NY|publisher=American Physical Society|volume=86|issue=4|page=043518 |arxiv=1206.1081|bibcode=2012PhRvD..86d3518L|doi=10.1103/physrevd.86.043518|s2cid=34672482 }}</ref>

But, Lehners continues, "the current leading measure proposals&mdash;namely, the global [[Light cone|light-cone]] cutoff and its local counterpart, the [[Measure problem (cosmology)#Causal diamond|causal diamond measure]]&mdash;as well as closely related proposals, all predict that we should live in a pocket universe that starts out with a small [[Hubble's law|Hubble rate]], thus favoring emergent and cyclic models." Lehners adds, "Pocket universes which undergo cycles are further preferred, because they produce habitable conditions repeatedly inside each pocket."