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Kaluza-Klein Theory
Two scientists by the name of Kaluza and Klein discover that electromagnetism can be derived from gravity if there are 4 dimensions. This adds feasibility to the string theory. Kaluza and Kein made this discovery independent of eachother. -
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Introduction of the String Theory
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particle theorists develop theories that supposrt string theory
Three particle theorists independently realize that the dual theories developed in 1968 to describe the particle spectrum also describe the quantum mechanics of oscillating strings. -
String theory is born
Dual theories developed in 1968 to describe particle spectrum also describe oscillation of strings -
Supersymmetry
There need to be equal number of Bosons and Fermions in the non Bosonic versions of string Theory -
Gostone publishes Paper
A scientist by the name of Goldstone published paper on String quantization. Generated interest in the field. -
theory of quantum gravity
Strings with closed loops are a candidate for gravitons, which mediate the force of gravity -
Supergravity
Supersymmetry is added to gravity to form supergravity -
Superstrings
A mathematical relation between bosons and fermions
String theory and supersymmetry yield an excitation spectrum which contains equal number of Bosons and Fermions. The resulting objects are called superstrings. -
the biggest year for String Theory
Deadly anomalies that threatened to make the theory senseless were discovered to cancel each other when the underlying symmetries in the theory belong two special groups. Finally string theory is accepted by the mainstream physics community as an actual candidate theory uniting quantum mechanics, particle physics and gravity. -
First superstring Revolution
discovery of anomaly cancellation in type I string theory -
duality revolution
The different flavours of superstring theory were found to transform into one another using duality -
Second Superstring revolution
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the M-thoery
M-theory was used to explain a number of previously observed dualities (using which one string theory could be transformed into another). M-Theory requires 11-dimensions and higher dimensional objects called D-branes. M-theory is widely regarded as the theory of everything. -
Blackhole physics explained by string theory
String theory sheds amazing light on the perplexing subject of black hole quantum mechanics. -
AdS/CFT correspondence
It is a concrete realization of the holographic principle, which has far-reaching implications for black holes, locality and information in physics, as well as the nature of the gravitational interaction.
