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K.P. Yogendran
Research Summary:
Since joining HRI in August, I have been working on three projects.
- The first of these involves constructing D-branes in the 2-D
Lorentzian black hole which forms an exact string theory background.
I have constructed the open string CFT's associated to the branes,
many of which are time dependent, and analysed their semiclassics.
This work is nearing completion.
The next step in the project is to
write down the boundary states corresponding to these branes. Work is
in progress on constructing the boundary states, and studying the
properties of these branes including their relations to other time
dependent configurations in c=1 string theory and the c=1 matrix model.
- During a visit to CTS-IISc, I have started on a collaboration with
Prof. Sachin Vaidya (CTS) in studying tachyon condensation in fuzzy
spheres. We have constructed a classical solution, in the large N
limit, that describes the fusion of multiple spheres, and work is in
progress to uplift this solution to string theory by finding a
marginal deformation of the fuzzy sphere BCFT.
- In collaboration with Joris Raeymakers, I am investigating the
possibility of inflation in string theory. Following earlier
work, we are studying whether inflation can be realised by tachyon
condensation in the KKLT scenario.
Conference/Workshops Attended:
Winter Workshop on String theory, IIT-Kanpur (Dec 2003)
Visits to other Institutes:
- IIT-Kanpur, (Workshop on String theory) (Dec, 2003)
- CTS-IISc, Bangalore (TPSC Visit) (Dec 2003 - Jan 2004)
- IMSc, Chennai (TPSC Visit) (Dec 2003 - Jan 2004)
- T.I.F.R Mumbai, (PhD Viva Voce examination) (Dec2003 - Jan 2004)
Invited Lectures/Seminars:
- TPSC Seminars in CTS and in IMSc titled
"Topology and Dynamics of fuzzy spheres" (Dec, 2003 -Jan, 2004)
- Lectures on Black holes and thermodynamics in SSGC, (May, 2004)
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