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String Field Theory

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String Theory
Stringinteractions
All Roads Lead to String Theory (Polchinski)
Prior to the First Superstring Revolution
Early History S-Matrix Theory
Regge Trajectory
Bosonic String Theory Worldsheet
String
Bosonic String Theory
String Perturbation Theory
Tachyon Condensation
Supersymmetric Revolution Supersymmetry
RNS Formalism
GS Formalism
BPS
Superstring Revolutions
First Superstring Revolution GSO Projection
Type II String Theory
Type IIB String Theory
Type IIA String Theory
Type I String Theory
Type H String Theory
Type HO String Theory
Type HE String Theory
Second Superstring Revolution T-Duality
D-Brane
S-Duality
Horava-Witten String Theory
M-Theory
Holographic Principle
N=4 Super-Yang-Mills Theory
AdS CFT
BFSS Matrix Theory
Matrix String Theory
(2,0) Theory
Twistor String Theory
F-Theory
String Field Theory
Pure Spinor Formalism
After the Revolutions
Phenomenology String Theory Landscape
Minimal Supersymmetric Standard Model
String Phenomenology


String Field Theory is an attempt to develop a formalism for String Theory that is more advanced than String Perturbation Theory.

A classical field associates field values (perhaps scalars or vectors) with points in space-time; a classical string field associates such quantities with lines or loops in space-time - all the possible configurations of a classical string. Adding quantum mechanics to field theory produces quantum field theory, the theoretical framework of particle physics, and from this foundation, the perturbative formalism of Feynman diagrams can be derived.

Analogously, it was intended that "quantum string field theory" should be a fundamental theory that motivates the formalism of perturbative String Theory. It has not quite achieved this status[1], but research continues[2], and string field theory has found use in Ashoke Sen's analysis of Tachyon Condensation.


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