In string theory,
D-branes, short for Dirichlet membrane, are a class of extended objects upon which
open strings can end with Dirichlet boundary conditions, after which they are named.
D-branes were discovered by Dai, Leigh and Polchinski,[1] and
independently by Hořava,[2] in 1989.
In 1995, Polchinski identified D-branes with black p-brane solutions of supergravity,
a discovery that triggered the Second Superstring Revolution and
led to both holographic and M-theory dualities.
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