String theory is an research framework in particle physics that attempts to reconcile quantum mechanics and general relativity.

learn more… | top users | synonyms

3
votes
1answer
84 views

Physical interpretation of categorical structures related to Dirichlet Branes

In Dirichlet Branes and Mirror Symmetry by Aspinwall et al, section 5.9 discusses various questions that remain open. In particular they say: "There are many constructions from homological ...
5
votes
0answers
140 views

Solving numerically the equation of motion of D7 brane perturbation

I want to solve this equation $$ \partial_{\rho}^{2}\phi+\frac{3}{\rho}\partial_{\rho}\phi+\left(\frac{M^{2}}{(1+\rho^{2})^{2}}-\frac{l(l+2)}{\rho^{2}}\right)\phi=0 $$ numerically. I know that ...
2
votes
0answers
92 views

Status of a question from Freeman Dyson's 1972 article

In a famous article, Freeman Dyson mentions an interesting relationship between the $\tau$ functions of number theory and the dimensions of finite-dimensional simple Lie algebras (section 2). He ...
2
votes
0answers
109 views

rigorous treatment of infinitesimal reparametrizations

my first post :) I am asking this directed to mathematicians or mathematical physicists since I don't like the usual physics approach. Reading some string theory books I always find that the ...
1
vote
0answers
42 views

Weyl transformation of geodesic distance

Consider a Riemannian manifold $M$ with a metric $g$. For two points $x,y \in M$ the geodesic distance $d(x,y)$ is defined in the usual way. I would like to know if there is a formula expressing how ...
1
vote
0answers
46 views

CFT's vs Vertex Operator Alagebras

I am trying to clear my ideas about the relation between a Conformal Field Theory (CFT) and a Vertex Operator Algebra (VOA). For me a CFT based on a (complex) vector space $H$ is a projective monoidal ...
1
vote
0answers
36 views

Are $T^2/Z_2$ orbifolds just ironed spheres?

(Note that this question is migrated from the physics SE... I apologize for the imprecise language) The only $Z_2$ symmetries I can think of the torus are reflection on plane, whose quotient should ...
1
vote
0answers
62 views

Polchinski 12.3.22 - superspace green's function

Forming the supersymmetric string using superfields and superspace, Polchinski claims that the function $$ G \sim \ln{\left|z_{1} - z_{2} - \theta_{1}\theta_{2}\right|^{2}} $$ satisfies the equation ...
0
votes
0answers
25 views

Semi-infinite forms?

I am reading Vafa's paper 'Topological Mirros and Quantum Strings'(arXiv:hep-th/9111017). In this paper, the author says the Hilbert Space of a fermionic string theory corresponds to the space of ...
0
votes
0answers
25 views

What quantities does a local topological region have in 3D?

If we take an infinite solid R3 and cut out a torus and sew it back in with Dehn surgery. This will create a local topological region in R3. I was thinking.. are there any characteristic values ...