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Cosmic F- and D-strings
Edmund J. Copeland, Robert C. Myers, Joseph Polchinski
Macroscopic fundamental and Dirichlet strings have several potential instabilities: breakage, tachyon decays, and confinement by axion domain walls. We investigate the conditions u…
AdS Holography in the Penrose Limit
Nelia Mann, Joseph Polchinski
We study the holographic description of string theory in a plane wave spacetime by taking the Penrose limit of the usual AdS/CFT correspondence. We consider three-point functions w…
Hidden Symmetries of the AdS_5 x S^5 Superstring
Iosif Bena, Joseph Polchinski, Radu Roiban
Attempts to solve Yang-Mills theory must eventually face the problem of analyzing the theory at intermediate values of the coupling constant. In this regime neither perturbation th…
Monopoles, Duality, and String Theory
Joseph Polchinski
Dirac showed that the existence of magnetic monopoles would imply quantization of electric charge. I discuss the converse, and propose two `principles of completeness' which I illu…