Brane-world motion in compact dimensions

Brian Greene, Janna Levin, Maulik Parikh

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


The topology of extra dimensions can break global Lorentz invariance, singling out a globally preferred frame even in flat spacetime. Through experiments that probe global topology, an observer can determine her state of motion with respect to the preferred frame. This scenario is realized if we live on a brane universe moving through a flat space with compact extra dimensions. We identify three experimental effects due to the motion of our universe that one could potentially detect using gravitational probes. One of these relates to the peculiar properties of the twin paradox in multiply-connected spacetimes. Another relies on the fact that the Kaluza-Klein modes of any bulk field are sensitive to boundary conditions. A third concerns the modification to the Newtonian potential on a moving brane. Remarkably, we find that even small extra dimensions are detectable by brane observers if the brane is moving sufficiently fast. Communicated by P R L V Moniz

Original languageEnglish (US)
Article number155013
JournalClassical and Quantum Gravity
Issue number15
StatePublished - Aug 7 2011

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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