M-theory is a theory conjectured to exist by [[Edward Witten]] of the Institute for Advanced Study, that would unify the five different superstring theories: [[Type IIA string theory]], [[Type IIB string theory]], [[Heterotic string theory]], [[SO(32) string theory]], and heterotic ''E''<sub>8</sub>×''E''<sub>8</sub> string theory; all of these seemingly different string theories are simply different limits of the same underlying M-theory. [[Edward Witten]] has used M-theory to explain a number of observed dualities, such as the T-duality, U-duality and S-duality. The discovery of M-theory is hailed by string theorists as the second superstring revolution. | M-theory is a theory conjectured to exist by [[Edward Witten]] of the Institute for Advanced Study, that would unify the five different superstring theories: [[Type IIA string theory]], [[Type IIB string theory]], [[Heterotic string theory]], [[SO(32) string theory]], and heterotic ''E''<sub>8</sub>×''E''<sub>8</sub> string theory; all of these seemingly different string theories are simply different limits of the same underlying M-theory. [[Edward Witten]] has used M-theory to explain a number of observed dualities, such as the T-duality, U-duality and S-duality. The discovery of M-theory is hailed by string theorists as the second superstring revolution. |