OFF-SHELL TREE AMPLITUDES IN HIKKO’S CLOSED STRING FIELD THEORY

1992 ◽  
Vol 07 (20) ◽  
pp. 5019-5026
Author(s):  
AKINOBU UKEGAWA
Keyword(s):  
Field Theory ◽  
Conformal Field Theory ◽  
String Field Theory ◽  
Closed String ◽  
Conformal Field

Off-shell closed string tree amplitudes are obtained for the HIKKO’s theory, using the method of off-shell conformal field theory.

Conformal field theory and the symmetries of string field theory

1988 ◽  
Vol 296 (1) ◽  
pp. 220-252 ◽  
Author(s):  
Gary T. Horowitz ◽  
Stephen P. Martin
Keyword(s):  
Field Theory ◽  
Conformal Field Theory ◽  
String Field Theory ◽  
Conformal Field

scholarly journals EXACT SOLUTIONS IN OPEN BOSONIC STRING FIELD THEORY AND MARGINAL DEFORMATION IN CFT

2004 ◽  
Vol 19 (27) ◽  
pp. 4695-4713 ◽  
Author(s):  
J. KLUSOŇ
Keyword(s):  
Field Theory ◽  
Exact Solution ◽  
Conformal Field Theory ◽  
Exact Solutions ◽  
Classical Solution ◽  
String Field Theory ◽  
Equation Of Motion ◽  
Bosonic String ◽  
Conformal Field ◽  
Marginal Deformation

In this paper we continue our study of the exact solution in open bosonic string field theory. We present new solution in the string field theory defined on the background corresponding to the boundary conformal field theory describing D25-brane. Then we will study the fluctuation modes around this solution and we determine their basic properties from the linearized equation of motion of the string field theory defined above the classical solution.

scholarly journals TACHYON DYNAMICS IN OPEN STRING THEORY

2005 ◽  
Vol 20 (24) ◽  
pp. 5513-5656 ◽  
Author(s):  
ASHOKE SEN
Keyword(s):  
Field Theory ◽  
String Theory ◽  
String Field Theory ◽  
Quantum Dynamics ◽  
Open String ◽  
Closed String ◽  
Two Dimensional ◽  
Potential Models ◽  
Conformal Field ◽  
String Background

In this review we describe our current understanding of the properties of open string tachyons on an unstable D-brane or brane–antibrane system in string theory. The various string theoretic methods used for this study include techniques of two-dimensional conformal field theory, open string field theory, boundary string field theory, noncommutative solitons, etc. We also describe various attempts to understand these results using field theoretic methods. These field theory models include toy models like singular potential models and p-adic string theory, as well as more realistic version of the tachyon effective action based on Dirac–Born–Infeld type action. Finally we study closed string background produced by the "decaying" unstable D-branes, both in the critical string theory and in the two-dimensional string theory, and describe the open string completeness conjecture that emerges out of this study. According to this conjecture the quantum dynamics of an unstable D-brane system is described by an internally consistent quantum open string field theory without any need to couple the system to closed strings. Each such system can be regarded as a part of the "hologram" describing the full string theory.

BOUNDARY STATES IN BOUNDARY LCFT: AN ALGEBRAIC APPROACH

2003 ◽  
Vol 18 (25) ◽  
pp. 4639-4654 ◽  
Author(s):  
YUKITAKA ISHIMOTO
Keyword(s):  
Field Theory ◽  
Conformal Field Theory ◽  
Cell Structure ◽  
Algebraic Approach ◽  
Open String ◽  
Closed String ◽  
Conformal Field ◽  
Logarithmic Conformal Field Theory ◽  
Boundary States ◽  
Rank 2

It is well known that LCFT generally contains Jordan cell structure and, in our previous paper, we have proposed a conjecture that one and only one boundary sate is allowed in the rank-2 cell. With these states in c=-2 rational LCFT, we can express boundary states in the closed string picture, in regard to corresponding boundary conditions in the open string picture. In this paper, We briefly review our previous paper on boundary states in LCFTs. We also add one more proof which supports the conjecture, and confirm this doesn't change our previous results. This paper is based on the talk given at School & Workshop On Logarithmic Conformal Field Theory and Its Applications held in Tehran, Iran.

GLUING THEOREM, STAR PRODUCT AND INTEGRATION IN OPEN STRING FIELD THEORY IN ARBITRARY BACKGROUND FIELDS

1991 ◽  
Vol 06 (30) ◽  
pp. 5387-5407 ◽  
Author(s):  
A.S. SCHWARZ ◽  
ASHOKE SEN
Keyword(s):  
Field Theory ◽  
Conformal Field Theory ◽  
Half Plane ◽  
String Field Theory ◽  
Central Charge ◽  
Star Product ◽  
Open String ◽  
Conformal Field ◽  
Upper Half Plane ◽  
Background Fields

We discuss how to define star product and integration in a string field theory formulated in a background provided by an arbitrary conformal field theory on the upper half-plane with central charge 26.

A Review of Conformal Field Theory in 2D

2014 ◽  
Vol 6 (2) ◽  
pp. 1079-1105
Author(s):  
Rahul Nigam
Keyword(s):  
Field Theory ◽  
Quantum Field Theory ◽  
Conformal Field Theory ◽  
Statistical Mechanics ◽  
Critical Behavior ◽  
Verma Module ◽  
Virasoro Algebra ◽  
Quantum Field ◽  
Conformal Field ◽  
Insight Into

In this review we study the elementary structure of Conformal Field Theory in which is a recipe for further studies of critical behavior of various systems in statistical mechanics and quantum field theory. We briefly review CFT in dimensions which plays a prominent role for example in the well-known duality AdS/CFT in string theory where the CFT lives on the AdS boundary. We also describe the mapping of the theory from the cylinder to a complex plane which will help us gain an insight into the process of radial quantization and radial ordering. Finally we will develop the representation of the Virasoro algebra which is the well-known "Verma module".  

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