Field theory

Field Theory

Field Theory

In the meeting of this year, there were a total of 165 contributions in the form of panel and oral sections, besides two plenary and three parallel talks. As occurred in the previous meetings, these talks refer to recent and/or signi cative subjects in the Field Theory. At this year, one talk was on the Anti-de Sitter (AdS){ Conformal Field Theory (CFT) correspondence, two on nonconcommutative ...

Operads and Conformal Field Theory Lecture 1: Conformal Field Theory

Physicists have developed very advanced methods to compute such integrals. For example, the famous Feynman diagram technique allows us to compute the above integral for a rather particular function S(x), a small perturbation of a positive de nite quadratic form in R . Sometimes, elaborate techniques of physicists to compute simple things nd an amazing application to very general things in mathe...

D-brane effective field theory from string field theory

Open string field theory is considered as a tool for deriving the effective action for the massless or tachyonic fields living on D-branes. Some simple calculations are performed in open bosonic string field theory which validate this approach. The level truncation method is used to calculate successive approximations to the quartic terms φ4, (AAμ) 2 and [Aμ, Aν ] 2 for the zero momentum tachyo...

String Field Theory and Perturbative Dynamics of Noncommutative Field Theory

The perturbative dynamics of noncommutative field theory (NCFT) is discussed from a point view of string field theory. As in the commutative case it is inevitable to introduce a closed string, which may be described as a bound state of two open strings. We point out that the closed string, interacting nontrivially with the open string, plays an essential role in the ultraviolet region. The cont...