This paper deals with black holes, bubbles and orbifolds in GaussBonnet theory in five dimensional anti de Sitter space. In particular, we study stable, unstable and metastable phases of black holesâ€¦ (More)

This is a continuation of our earlier work where we constructed a phenomenologically motivated effective action of the boundary gauge theory at finite temperature and finite gauge coupling on S3Ã—S1.â€¦ (More)

Recently, Verlinde noted a surprising similarity between Friedmann equation governing radiation dominated universe and Cardyâ€™s entropy formula in conformal field theory. In this note, we study aâ€¦ (More)

We consider a D3-brane as boundary of a five dimensional charged anti de Sitter black hole. We show that the charge of the black hole induces a regular cosmological evolution for the scale factor ofâ€¦ (More)

We study a class of rotating dyonic black holes in the heterotic string theory in four dimension which have left, right independent electric charges but have same magnitude for the left and rightâ€¦ (More)

We investigate the cosmological solutions in closed bosonic string theory in the presence of non zero tachyon condensate. We specifically obtain time dependent solutions which describes anâ€¦ (More)

We study the Brans-Dicke model in the presence of an axion. The dynamical equations are solved when the fields are space independent and the metric is spatially flat. It is found that at late timeâ€¦ (More)

We construct R-charged adS bubbles in D = 5, N = 8 supergravity. These bubbles are charecterised by four parameters. The asymptotic boundary of these solutions are deSitter times a circle. Byâ€¦ (More)

We calculate the correction to the Bekenstein-Hawking entropy formula for five dimensional AdS-Schwarzschild black holes due to thermodynamic fluctuations. The result is then compared with theâ€¦ (More)

We review the method of constructing dipole and string loop solutions from the higher-dimensional (Euclidean) Kerr black hole. We analyse the results in various dimensions, finding solutions earlierâ€¦ (More)