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In string theory a given Riemann surface with punctures can usually be read in different ways as describing either closed strings or open strings. For instance the diskdiagram describes equivalently a process where a closed string disappears, or a process where an open string first appears and then disappears.
Since closed string excitations induce gravity while open string excitations induce YangMills fields as effective field theories, this leads to a multitude of relations between these ordinary quantum field theories, such as the KLT relations or the AdS/CFT correspondence.
J. Khoury, Herman Verlinde, On Open/Closed String Duality (arXiv:hepth/0001056)
Leonardo Rastelli, Lectures on open/closed string duality (pdf)
Last revised on October 25, 2012 at 23:30:09. See the history of this page for a list of all contributions to it.