Freund-Rubin compactification

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11D supergravity contains a 3-form field C. It also contains an electric 2-brane (M2) and a magnetic 5-brane (M5) under C. These branes are BPS states and they are also black branes. Their near horizon metrics are given by AdS₄×S⁷ and AdS₇× S⁴ respectively. These geometries contain a nonzero four-flux which gives rise to a nonzero Ricci curvature. They are called Freund-Rubin compactifications.

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• This page was last modified 11:22, 13 November 2007 by Wikipedia user Lantonov. Based on work by Wikipedia user(s) Beetstra and Jickle.
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