scholarly journals Moving fractional branes with background fields: Interaction and tachyon condensation

2015 ◽  
Vol 92 (4) ◽  
Author(s):  
Maryam Saidy-Sarjoubi ◽  
Davoud Kamani
Keyword(s):  
Tachyon Condensation ◽  
Background Fields

scholarly journals Brane with transverse rotation and background fields: boundary state and tachyon condensation

2020 ◽  
Vol 80 (7) ◽  
Author(s):  
Davoud Kamani
Keyword(s):  
String Theory ◽  
Tachyon Condensation ◽  
Internal Field ◽  
Open String ◽  
Bosonic String ◽  
Boundary State ◽  
Bosonic String Theory ◽  
Transverse Rotation ◽  
Background Fields

Abstract The boundary state corresponding to the Dp-brane with a transverse rotation in the presence of the Kalb–Ramond and tachyon background fields and a U(1) internal field will be constructed. We shall investigate effects of the open string tachyon condensation on this brane via its boundary state. We demonstrate that the background fields and transverse rotation cannot protect the brane against the collapse. Our calculations are in the context of the bosonic string theory.

scholarly journals Tachyon condensation and brane descent relations in -adic string theory

2000 ◽  
Vol 584 (1-2) ◽  
pp. 300-312 ◽  
Author(s):  
Debashis Ghoshal ◽  
Ashoke Sen
Keyword(s):  
String Theory ◽  
Tachyon Condensation

scholarly journals ON TARGET SPACE DUALITY IN p-BRANES

1995 ◽  
Vol 10 (05) ◽  
pp. 441-450 ◽  
Author(s):  
R. PERCACCI ◽  
E. SEZGIN
Keyword(s):  
Dimensional Space ◽  
Target Space ◽  
Field Equations ◽  
Parameter Group ◽  
Duality Transformations ◽  
World Volume ◽  
The World ◽  
Dimensional Space Time ◽  
Background Fields ◽  
Two Parameter

We study the target space duality transformations in p-branes as transformations which mix the world volume field equations with Bianchi identities. We consider an (m+p+1)-dimensional space-time with p+1 dimensions compactified, and a particular form of the background fields. We find that while a GL (2) = SL (2) × R group is realized when m = 0, only a two-parameter group is realized when m > 0.

scholarly journals Type I background fields in terms of type IIB ones

2008 ◽  
Vol 666 (4) ◽  
pp. 400-403 ◽  
Author(s):  
B. Nikolić ◽  
B. Sazdović
Keyword(s):  
Type I ◽  
Background Fields

scholarly journals Non-supersymmetric D1/D5, F/NS5 and closed string tachyon condensation

2009 ◽  
Vol 819 (1-2) ◽  
pp. 282-305 ◽  
Author(s):  
J.X. Lu ◽  
Shibaji Roy ◽  
Zhao-Long Wang ◽  
Rong-Jun Wu
Keyword(s):  
Tachyon Condensation ◽  
Closed String

scholarly journals Particle Production in Tachyon Condensation

2004 ◽  
Vol 2004 (06) ◽  
pp. 040-040 ◽  
Author(s):  
G.L Alberghi ◽  
R Casadio ◽  
A Tronconi
Keyword(s):  
Particle Production ◽  
Tachyon Condensation

Application of IVAP-Based Observation Operator in Radar Radial Velocity Assimilation: The Case of Typhoon Fitow

2017 ◽  
Vol 145 (10) ◽  
pp. 4187-4203 ◽  
Author(s):  
Feng Chen ◽  
Xudong Liang ◽  
Hao Ma
Keyword(s):  
Spatial Distribution ◽  
Radial Velocity ◽  
Doppler Radar ◽  
Tangential Velocity ◽  
Distribution Characteristics ◽  
Observation Operator ◽  
Spatial Distribution Characteristics ◽  
Tangential Wind ◽  
Analysis System ◽  
Background Fields

An improved Doppler radar radial velocity assimilation observation operator is proposed based on the integrating velocity–azimuth process (IVAP) method. This improved operator can ingest both radial wind and its spatial distribution characteristics to deduce the two components of the mean wind within a given area. With this operator, the system can be used to assimilate information from tangential wind and radial wind. On the other hand, because the improved observation operator is defined within a given area, which can be uniformly chosen in both the observation and analysis coordinate systems, it has a thinning function. The traditional observation operator and the improved observation operator, along with their corresponding data processing modules, were implemented in the community Gridpoint Statistical Interpolation analysis system (GSI) to demonstrate the superiority of the improved operator. The results of single analysis unit experiments revealed that the two operators are comparable when the analysis unit is small. When the analysis unit becomes larger, the analysis results of the improved operator are better than those of the traditional operator because the former can ingest more wind information than the latter. The results of a typhoon case study indicated that both operators effectively ingested radial wind information and produced more reasonable typhoon structures than those in the background fields. The tangential velocity relative to the radar was retrieved by the improved operator through ingesting tangential wind information from the spatial distribution characteristics of radial wind. Because of the improved vortex intensity and structure, obvious improvements were seen in both track and intensity predictions when the improved operator was used.

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