scholarly journals Background independent algebraic structures in closed string field theory

1996 ◽  
Vol 177 (2) ◽  
pp. 305-326 ◽  
Author(s):  
Ashoke Sen ◽  
Barton Zwiebach
Keyword(s):  
Field Theory ◽  
String Field Theory ◽  
Closed String ◽  
Algebraic Structures

scholarly journals Open-closed string correspondence in open string field theory

2008 ◽  
Vol 56 (4-5) ◽  
pp. 343-351 ◽  
Author(s):  
M. Baumgartl ◽  
I. Sachs
Keyword(s):  
Field Theory ◽  
String Field Theory ◽  
Open String ◽  
Closed String

Singularities and dualities of pedal curves in pseudo-hyperbolic and de Sitter space

2020 ◽  
Vol 18 (01) ◽  
pp. 2150008
Author(s):  
Yanlin Li ◽  
Yushu Zhu ◽  
Qing-You Sun
Keyword(s):  
Field Theory ◽  
String Field Theory ◽  
Normal Forms ◽  
De Sitter Space ◽  
Closed String ◽  
Condensation Process ◽  
De Sitter ◽  
Unit Speed ◽  
Dual Curve ◽  
Pedal Curve

For the spherical unit speed nonlightlike curve in pseudo-hyperbolic space and de Sitter space [Formula: see text] and a given point P, we can define naturally the pedal curve of [Formula: see text] relative to the pedal point P. When the pseudo-sphere dual curve germs are nonsingular, singularity types of such pedal curves depend only on locations of pedal points. In this paper, we give a complete list of normal forms for singularities and locations of pedal points when the pseudo-sphere dual curve germs are nonsingular. Furthermore, we obtain the extension results in dualities, which has wide influence on the open and closed string field theory and string dynamics in physics, and can be used to better solve the dynamics of trajectory particle condensation process.

DERIVING THE FOUR-STRING AND OPEN-CLOSED STRING INTERACTIONS FROM GEOMETRIC STRING FIELD THEORY

1990 ◽  
Vol 05 (04) ◽  
pp. 659-724 ◽  
Author(s):  
MICHIO KAKU
Keyword(s):  
Field Theory ◽  
String Field Theory ◽  
Geometric Theory ◽  
Open String ◽  
Bound State ◽  
Closed String ◽  
String Length ◽  
Light Cone Gauge ◽  
New Class ◽  
Coulomb Term

One of the baffling questions concerning the covariant open string field theory is why there are two distinct BRST theories and why the four-string interaction appears in one version but not the other. We solve this mystery by showing that both theories are gauge-fixed versions of a higher gauge theory, called the geometric string field theory, with a new field, a string vierbein [Formula: see text], which allows us to gauge the string length and σ-parametrization. By fixing the gauge, we can derive the “endpoint gauge” (the covariantized light cone gauge), the “midpoint gauge” of Witten, or the “interpolating gauge” with arbitrary string lengths. We show explicitly that the four-string interaction is a gauge artifact of the geometric theory (the counterpart of the four-fermion instantaneous Coulomb term of QED). By choosing the interpolating gauge, we produce a new class of four-string interactions which smoothly interpolate between the endpoint gauge and the midpoint gauge (where it vanishes). Similarly, we can extract the closed string as a bound state of the open string, which appears in the endpoint gauge but vanishes in the midpoint gauge. Thus, the four-string and open-closed string interactions do not have to be added to the action as long as the string vierbein is included.

ON CLOSED STRING COUNTERTERMS

1990 ◽  
Vol 05 (08) ◽  
pp. 551-560 ◽  
Author(s):  
MAHA SAADI
Keyword(s):  
Field Theory ◽  
Scattering Amplitudes ◽  
String Field Theory ◽  
Closed String ◽  
Brst Invariance

A one-loop tadpole and a one-loop two-string counterterms are proposed, capable of restoring BRST invariance to the respective scattering amplitudes of polyhedral closed string field theory.

scholarly journals Gauge invariant operators and closed string scattering in open string field theory

2002 ◽  
Vol 536 (1-2) ◽  
pp. 129-137 ◽  
Author(s):  
Mohsen Alishahiha ◽  
Mohammad R. Garousi
Keyword(s):  
Field Theory ◽  
String Field Theory ◽  
Open String ◽  
Closed String ◽  
Gauge Invariant
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