[hep-th] Seminari grupe za cestice i gravitaciju

[Branislav Cvetkovic]

Postovane kolege,

Tokom sledece nedelje (u periodu od 18-22. februara) dr  Raju 
Roychowdhury sa Univerziteta Sao Paolo u Brazilu odrzace tri seminara na 
Institutu za fiziku po sledecem rasporedu:


PONEDELJAK 18. februar, citaonica ,, Dragan Popovic", 12h:


Title : Emergent Spacetime, Topology Change and Resolution of 
Singularity
Abstract :
The contemporary physics has revealed growing evidences that the 
emergence can be applied to not only biology and condensed matter 
systems but also to gravity and spacetime. We observe that 
noncommutativity necessarily implies emergent spacetime. In Emergent 
Gravity approach the spacetime geometry is defined by U(1) gauge fields 
on noncommutative (NC) spacetime. Accordingly the topology of spacetime 
is determined by the topology of NC U(1) gauge fields. We show that 
topology change of spacetime is ample in emergent gravity and the 
subsequent resolution of singularity is possible in NC spacetime. Thus 
emergent gravity provides a well-defined mechanism for topology change 
of spacetime which does not suffer from any singularity in sharp 
contrast to general relativity.


SREDA 20. febraur, sala 300, 11h:

Technical Seminar 1 :

Title : Emergent Gravity and Brane Correspondence between topological 
T-duals via Generalised Complex Geometry (Black Board Talk)

PETAK 22. febraur, sala 300, 11h:

Technical Seminar 2 :

Title : Poisson Lie Symmetry and Yang-Baxter Sigma Model


During past few years, I started developing the formalism of emergent 
gravity which naturally admits an in-built generalized geometric 
structure  and hence in quite similar to the DFT formalism of Hull and 
Zwiebach in spirit. We are trying to use the generalized geometric point 
of view to study topological T-duality that arises in emergent gravity. 
The approach aims to build a Courant isomorphism between T-duals and 
thus transport generalized complex structures between them. We are 
trying to use the machinery developed by Gualtieri and Cavalcanti to 
transport generalized complex brane between T-duals. We want to study 
various explicit example of this phenomenon of geometric T-duality and 
explore its manifestation in Stringy geometry.


Pozdrav Branislav

-- 
Institute of Physics Belgrade
Pregrevica 118, 11080 Belgrade, Serbia
http://www.ipb.ac.rs/