Bosonic string theory is the original version of string theory, developed in the late 1960s. It is so called because it contains only bosons in the spectrum...

'Superstring theory' is a shorthand for supersymmetric string theory because unlike bosonic string theory, it is the version of string theory that accounts...

of string theory, bosonic string theory, incorporated only the class of particles known as bosons. It later developed into superstring theory, which posits...

In string theory, a heterotic string is a closed string (or loop) which is a hybrid ('heterotic') of a superstring and a bosonic string. There are two...

supersymmetry known as bosonic string theories, which differed in the type of strings and in other aspects. Today these different superstring theories are thought...

that string theory had failed to catch on because physicists had underestimated its scope. This led to the development of bosonic string theory. String theory...

case of the bosonic open string theory in 26-dimensional flat spacetime, a general element of the Fock-space of the BRST quantized string takes the form...

conformal field theory defined on the worldsheet. For example, the bosonic string in 26 dimensions has a worldsheet conformal field theory consisting of...

physics, type II string theory is a unified term that includes both type IIA strings and type IIB strings theories. Type II string theory accounts for two...

Twistor string theory was extended first by generalising the RSV Yang–Mills amplitude formula, and then by finding the underlying string theory. The extension...

In theoretical physics, type I string theory is one of five consistent supersymmetric string theories in ten dimensions. It is the only one whose strings...

theories of superconductivity. Another example of a tachyonic field is the tachyon of bosonic string theory. Tachyons are predicted by bosonic string...

obtained from string theory, thus opening the door to a description of pre-Big Bang scenarios. The idea is related to a property of the bosonic string in a curve...

In string theory, the string theory landscape (or landscape of vacua) is the collection of possible false vacua, together comprising a collective "landscape"...

string theory topics. Strings Nambu–Goto action Polyakov action Bosonic string theory Superstring theory Type I string Type II string Type IIA string...

worldsheet theory. In order to preserve conformal symmetry the Weyl anomaly, and thus the central charge, must vanish. For the bosonic string this can be...

(sometimes called a "D-string"), a D2-brane is a plane, and a D25-brane fills the highest-dimensional space considered in bosonic string theory. There are also...

theoretical physics, F-theory is a branch of string theory developed by Iranian-American physicist Cumrun Vafa. The new vacua described by F-theory were discovered...

Edward Witten first conjectured the existence of such a theory at a string theory conference at the University of Southern California in 1995. Witten's...

the simplest invariant action in bosonic string theory, and is also used in other theories that investigate string-like objects (for example, cosmic...

a type of string that vibrates one way, while the up quark is a type of string vibrating another way, and so forth). String theory/M-theory proposes six...

but are nevertheless equivalent when employed as extra dimensions of string theory. Early cases of mirror symmetry were discovered by physicists. Mathematicians...

Twistor string theory is an equivalence between N = 4 supersymmetric Yang–Mills theory and the perturbative topological B model string theory in twistor...

obligatory gauge symmetry in type I and heterotic string theories, and obtained in type II string theory by compactification on certain Calabi–Yau manifolds...

numbers, where the imaginary part is positive. It also occurs in bosonic string theory. For any complex number τ with Im(τ) > 0, let q = e2πiτ; then the...

either 26 in the case of bosonic string theory or 10 in the case of superstring theory. This case is called critical string theory. There are alternative...

quantum field theory, a bosonic field is a quantum field whose quanta are bosons; that is, they obey Bose–Einstein statistics. Bosonic fields obey canonical...

Consistency of string theory models imposes constraints on the central charge of this CFT, which should be c = 26 in bosonic string theory and c = 10 in...

physics, matrix string theory is a set of equations that describe superstring theory in a non-perturbative framework. Type IIA string theory can be shown...

bosonic partners of fermions are prefixed with s-, because they are scalar particles. For example, if the electron existed in a supersymmetric theory...