In string theory by a “probe branes” authors refer to the idea of “adding” to a configuration of black branes one (or a small number) of further branes whose (gravitational, electric, and/or RR-field) backreaction on the given black brane background is neglected. (So a probe brane “probes” the background geometry with affecting it.)
This is, of course, the case for Green-Schwarz sigma-model-branes in the given background, but authors tend to speak of “probe branes” when they think of these as actually being black branes themselves, just so light (i.e. of such small number compared to the number of background branes) that their backreaction may be neglected not in principle but for practical purposes.
One particular use of (the idea of) probe branes is as flavor branes in backgrounds appearing in the AdS/QCD correspondence.
Early appearance of the concept of “probe branes”:
Further discussion:
Interpretation of probe branes as flavor branes in the context of the AdS/QCD correspondence:
Andreas Karch, Emanuel Katz, Adding flavor to AdS/CFT, JHEP 0206:043, 2002 (arxiv:hep-th/0205236)
Peter Ouyang, Holomorphic D7-Branes and Flavored $\mathcal{N}=1$ Gauge Theories, Nucl. Phys. B699:207-225, 2004 (arXiv:hep-th/0311084)
Thomas S. Levi, Peter Ouyang, Mesons and Flavor on the Conifold, Phys. Rev. D76:105022, 2007 (arXiv:hep-th/0506021)
Last revised on May 19, 2020 at 15:52:30. See the history of this page for a list of all contributions to it.