Last update: June 11, 2000
Physical Sciences
(First edited: March 05, 1999)
General out-line on my research:
My research interest is in theoretical physics, namely in the areas
of quantum field theory (QFT), conformal field theory (CFT) and
quantum gravity.
In particular, I work in the domain of
superstring theory.
My current interest is in the
nonperturbative formulation
of
string theory.
Under this investigation,
various
string theories can be found to have conceptual impact on the
geometrical
ideas and deal with the modern mathematical techniques.
Research plan:
In the last years, remarkable progress in superstring theory
has provided new tools to explore several important issues in
understanding the quantum nature of gravity.
For instance, one of the interesting conjecture is in the context of
anti de Sitter (adS) gravity
and conformal field theory (CFT) correspondence.
It states that: string theory in adS background space-time is equivalent
to a supersymmetric gauge theory which lives on the boundary of the
space-time. Since the gauge theory is unitary,
it suggests that no information
is lost in the quantum mechanical evolution of
black holes(adS).
However,
the unitarity is not well understood from the space-time (adS) point of view.
In other words, if one starts with an unitary process through out the
black hole evolution, then lands up with a nonlocal space-time physics
or a nonlocal quantum field theory. The nonlocality would lead to
noncommutative
nature of space-time in presence of certain background. This
raises an important issue to understand the uncertainty relation
for the nonperturbative strings & branes. Since the noncommutative nature
of space-time is not apparent to our everyday low energy activities, it is
a subtle issue ! Thus the study of black holes in the frame work of string
theory may explain the holographic principle of quantum gravity.
Technical details can be obtained
from the electronic archive
hep-th .
Recent research :
KEY WORDS : Quantum field theory, String theory (M-theory) & Quantum
Gravity.
(Duality symmetry, D-branes,
Noncommutative geometry, Holographic idea & Cosmology)
For articles, please browse the archive @
High Energy Physics-Theory :
June 2000,
1999 November,
1999 July,
1998 December,
1998 July,
1997 January,
1996 January,
1995 November,
1995 July.
Ph.D (January'96) thesis :
TITLE :Classical solutions of String theory (
references )
My thesis is primarily based on
the work carried out in collaborations during 1991-94 and the papers
are published in
the following journals:
1).
Modern Physics Letter A7 (1992)
2).
Physics Letter B291 (1992)
3).
Physical Review D47 (1993)
4).
Modern Physics Letter A9 (1994)
5).
Int.Journal of Modern Physics A10 (1995)