The Raychaudhuri equations: A brief review
- S. Kar, S. Sengupta
- Mathematics
- 23 November 2006
We present a brief review on the Raychaudhuri equations. Beginning with a summary of the essential features of the original article by Raychaudhuri and subsequent work of numerous authors, we move on…
Packing extra mass in compact stellar structures: an interplay between Kalb-Ramond field and extra dimensions
- S. Chakraborty, S. Sengupta
- Physics, Geology
- 25 August 2017
We have derived the Buchdahl's limit for a relativistic star in presence of the Kalb-Ramond field in four as well as in higher dimensions. It turns out that the Buchdahl's limit gets severely…
Living on the edge in a spacetime with multiple warping
- D. Choudhury, S. Sengupta
- Physics
- 22 December 2006
The Randall-Sundrum warped braneworld model is generalised to six and higher dimensions such that the warping has a non-trivial dependence on more than one dimension. This naturally leads to a…
Strong gravitational lensing—a probe for extra dimensions and Kalb-Ramond field
- S. Chakraborty, S. Sengupta
- Physics
- 18 November 2016
Strong field gravitational lensing in the context of both higher spacetime dimensions and in presence of Kalb-Ramond field have been studied. After developing proper analytical tools to analyze the…
A Deformable Shell Model for the Alkali Halides
- A. Basu, S. Sengupta
- Chemistry
- 1968
The simple shell model which takes account of the polarizability of the ions is improved by including the effect of deformations of the electron shell during the vibrations of the ions. The…
Solving higher curvature gravity theories
- S. Chakraborty, S. Sengupta
- Physics
- 18 April 2016
Solving field equations in the context of higher curvature gravity theories is a formidable task. However, in many situations, e.g., in the context of f(R) theories, the higher curvature gravity…
Tidal Love numbers of black holes and neutron stars in the presence of higher dimensions: Implications of GW170817
- K. Chakravarti, S. Chakraborty, S. Bose, S. Sengupta
- PhysicsPhysical Review D
- 28 November 2018
We calculate the tidal Love numbers of black holes and neutron stars in the presence of higher dimensions. The perturbation equations around an arbitrary static and spherically symmetric metric for…
Cosmological constant, brane tension and large hierarchy in a generalized Randall-Sundrum braneworld scenario
- Saurya Das, D. Maity, S. Sengupta
- Physics
- 12 November 2007
Sherpa Romeo green journal. Open access article. Creative Commons Attribution License (CC BY 4.0) applies.
PARITY-VIOLATING GRAVITATIONAL COUPLING OF ELECTROMAGNETIC FIELDS
- P. Majumdar, S. Sengupta
- Physics
- 7 June 1999
A manifestly gauge-invariant formulation of the coupling of the Maxwell theory with an Einstein-Cartan geometry is given, where the spacetime torsion originates from a massless Kalb-Ramond field…
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