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What is the origin of the five-form field in bubbling Ads geometries?

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I have been reading the paper: Bubbling Ads space and the 1/2 BPS geometries[hep-th/0409174]. In the paper they look at 1/2 BPS states in the field theory which are dual to D3 branes IIB supegravity. The D3 branes couple to a four form potential . I would like to ask, why is it that the D3 brane couples to a four form potential?

This post imported from StackExchange Physics at 2016-05-19 20:19 (UTC), posted by SE-user Kay Modikai

asked May 18, 2016 in Theoretical Physics by Kay Modikai (5 points) [ no revision ]

All type II D$p$-branes couple to the $(p+1)$-form potential - whose physical excitations appear in the Ramond-Ramond sector of closed strings. This is the biggest insight of Joe Polchinski's, 1995, which has now over 3,000 citations: scholar.google.com/… arxiv.org/abs/hep-th/9510017 - One really can't do anything meaningful with D-branes without knowing this coupling.

This post imported from StackExchange Physics at 2016-05-19 20:19 (UTC), posted by SE-user Luboš Motl

commented May 18, 2016 by Luboš Motl (10,278 points) [ no revision ]

@Lubos Thank you.

This post imported from StackExchange Physics at 2016-05-19 20:19 (UTC), posted by SE-user Kay Modikai

commented May 19, 2016 by Kay Modikai (5 points) [ no revision ]

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