scholarly journals Structure of spinning particle suggested by gravity, supergravity and low-energy string theory

2000 ◽  
Vol 50 (S1) ◽  
pp. 201-206 ◽  
Author(s):  
A. Ya. Burinskii
Keyword(s):  
String Theory ◽  
Low Energy ◽  
Spinning Particle

scholarly journals GRAVITY ON NONCOMMUTATIVE D-BRANES

2003 ◽  
Vol 18 (07) ◽  
pp. 1051-1066 ◽  
Author(s):  
F. ARDALAN ◽  
H. ARFAEI ◽  
M. R. GAROUSI ◽  
A. GHODSI
Keyword(s):  
String Theory ◽  
Effective Action ◽  
Low Energy ◽  
Bosonic String ◽  
First Order ◽  
Energy Scattering ◽  
Bosonic String Theory ◽  
Brane Action

The effective action for the low energy scattering of two gravitons with a D-brane in the presence of a constant antisymmetric B field in bosonic string theory is calculated and the modification to the standard D-brane action to first order in α′ is obtained.

scholarly journals STRINGS, NONCOMMUTATIVE GEOMETRY AND THE SIZE OF THE TARGET SPACE

1999 ◽  
Vol 14 (28) ◽  
pp. 4501-4517 ◽  
Author(s):  
FEDELE LIZZI
Keyword(s):  
String Theory ◽  
Dirac Operator ◽  
Noncommutative Geometry ◽  
Low Energy ◽  
Target Space ◽  
World Sheet ◽  
Crucial Point ◽  
Spectral Action ◽  
Energy Eigenvalues ◽  
The World

We describe how the presence of the antisymmetric tensor (torsion) on the world sheet action of string theory renders the size of the target space a gauge noninvariant quantity. This generalizes the R ↔ 1/R symmetry in which momenta and windings are exchanged, to the whole O(d,d,ℤ). The crucial point is that, with a transformation, it is possible always to have all of the lowest eigenvalues of the Hamiltonian to be momentum modes. We interpret this in the framework of noncommutative geometry, in which algebras take the place of point spaces, and of the spectral action principle for which the eigenvalues of the Dirac operator are the fundamental objects, out of which the theory is constructed. A quantum observer, in the presence of many low energy eigenvalues of the Dirac operator (and hence of the Hamiltonian) will always interpreted the target space of the string theory as effectively uncompactified.

scholarly journals STRING COSMOLOGY AND CHAOS

2004 ◽  
Vol 19 (10) ◽  
pp. 1499-1509
Author(s):  
THIBAULT DAMOUR
Keyword(s):  
String Theory ◽  
Coming Out ◽  
String Cosmology ◽  
Low Energy ◽  
Weyl Groups ◽  
Tree Level ◽  
Cosmological Solutions

We briefly review two aspects of string cosmology: (1) the presence of chaos in the generic cosmological solutions of the tree-level low-energy effective actions coming out of string theory, and (2) the remarkable link between the latter chaos and the Weyl groups of some hyperbolic Kac–Moody algebras.

scholarly journals A NOTE ON DUALITIES IN EINSTEIN'S GRAVITY IN THE PRESENCE OF A NON-MINIMALLY COUPLED SCALAR FIELD

2003 ◽  
Vol 18 (15) ◽  
pp. 1043-1051 ◽  
Author(s):  
L. R. ABRAMO ◽  
L. BRENIG ◽  
E. GUNZIG ◽  
ALBERTO SAA
Keyword(s):  
Scalar Field ◽  
String Theory ◽  
Effective Action ◽  
Low Energy ◽  
Conformal Transformations ◽  
Spacetime Curvature

We show that the action of Einstein's gravity with a scalar field coupled in a generic way to spacetime curvature is invariant under a particular set of conformal transformations. These transformations relate dual theories for which the effective couplings of the theory are scaled uniformly. In the simplest case, this class of dualities reduces to the S-duality of low-energy effective action of string theory.

scholarly journals Exact results for the low energy AdS 4 × $ \mathbb{C}\mathbb{P} $ 3 string theory

2013 ◽  
Vol 2013 (11) ◽  
Author(s):  
Alessandro Fabbri ◽  
Davide Fioravanti ◽  
Simone Piscaglia ◽  
Roberto Tateo
Keyword(s):  
String Theory ◽  
Low Energy ◽  
Exact Results

scholarly journals Spinning dilaton black hole in 2 + 1 dimensions as a particle accelerator

2017 ◽  
Vol 32 (13) ◽  
pp. 1750074 ◽  
Author(s):  
Sharmanthie Fernando
Keyword(s):  
Black Hole ◽  
String Theory ◽  
Center Of Mass ◽  
Low Energy ◽  
Particle Accelerator ◽  
Particle Collision ◽  
Dilaton Black Hole

In this paper, we have studied particle collision around a spinning dilaton black hole in 2 + 1 dimensions. This black hole is a solution to the low-energy string theory in 2 + 1 dimensions. Time-like geodesics are presented in detail and the center-of-mass (CM) energy of two-particle collision at the horizon of a spinning black hole is considered. We noticed that there is a possibility of the two masses to create infinite CM energy.

Generalized Xanthopoulos theorem in the low-energy limit of string theory

1998 ◽  
Vol 58 (10) ◽  
Author(s):  
R. Cartas-Fuentevilla ◽  
A. Hernandez-Castillo
Keyword(s):  
String Theory ◽  
Low Energy ◽  
Energy Limit
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