M Theory (the Theory Formerly Known as Strings)
Abstract
Superunification underwent a major paradigm shift in 1984 when elevendimensional supergravity was knocked off its pedestal by tendimensional superstrings. This last year has witnessed a new shift of equal proportions: perturbative tendimensional superstrings have in their turn been superseded by a new nonperturbative theory called M theory, which describes supermembranes and superfivebranes, which subsumes all five consistent string theories and whose low energy limit is, ironically, elevendimensional supergravity. In particular, sixdimensional string/string duality follows from membrane/fivebrane duality by compactifying M theory on S^{1}/Z_{2}×K3 (heterotic/heterotic duality) or S^{1}×K^{3} (Type IIA/heterotic duality) or S^{1}/Z_{2}×T^{4} (heterotic/Type IIA duality) or S_{1}×T^{4} (Type IIA/Type IIA duality).
 Publication:

International Journal of Modern Physics A
 Pub Date:
 1996
 DOI:
 10.1142/S0217751X96002583
 arXiv:
 arXiv:hepth/9608117
 Bibcode:
 1996IJMPA..11.5623D
 Keywords:

 High Energy Physics  Theory;
 General Relativity and Quantum Cosmology
 EPrint:
 Version to appear in I.J.M.P.A. References added