4 papers
Large Extra Dimensions and Noncommutative Geometry in String Theory
Farhad Ardalan
The consequences of noncommutativity of space coordinates of string theory in the proposed large extra dimension solution to the hierarchy problem are explored; in particular the l…
String Theory, Matrix Model, and Noncommutative Geometry
F. Ardalan
Compactification of Matrix Model on a Noncommutative torus is obtained from strings ending on D-branes with background B field. The BPS spectrum of the system and a novel SL(2,Z) s…
Mixed Branes and M(atrix) Theory on Noncommutative Torus
F. Ardalan, H. Arfaei, M. M. Sheikh-Jabbari
We derive the noncommutative torus compactification of M(atrix) theory directly from the string theory by imposing mixed boundary conditions on the membranes. The relation of vario…
2D Black Holes and 2D Gravity
Farhad Ardalan
\small The SL coset model, with an element of the third conjugacy class of subgroups, is considered. The resulting theory is seen to collapse to a one…