1.

Noether current, black hole entropy and spacetime torsion
/ Chakraborty, Sumanta ; Dey, Ramit
We show that the presence of spacetime torsion, unlike any other nontrivial modifications of the Einstein gravity, does not affect black hole entropy. [...]
Published in Physics letters B 786 (2018) 432441
10.1016/j.physletb.2018.10.027
Fulltext: XML PDF;

2.

A comment on generalized Schwinger effect
/ Rajeev, Karthik ; Chakraborty, Sumanta ; Padmanabhan, T.
A spatially homogeneous, timedependent, electric field can produce charged particle pairs from the vacuum. [...]
Published in EPJC 78 (2018) 836
10.1140/epjc/s1005201863102
Fulltext: XML PDF (PDFA);

3.

On the physical process first law for dynamical black holes
/ Mishra, Akash ; Chakraborty, Sumanta ; Ghosh, Avirup ; Sarkar, Sudipta
Physical process version of the first law of black hole mechanics relates the change in entropy of a perturbed Killing horizon, between two asymptotic cross sections, to the matter flow into the horizon. [...]
Published in JHEP 1809 (2018) 034
10.1007/JHEP09(2018)034
arXiv:1709.08925
Fulltext: XML PDF (PDFA);

4.

Unruh effect for inertial observers through vacuum correlations
/ Lochan, Kinjalk ; Chakraborty, Sumanta ; Padmanabhan, T.
We study a dynamic version of the Unruh effect in a two dimensional collapse model forming a black hole. [...]
Published in EPJC 78 (2018) 433
10.1140/epjc/s1005201859110
Fulltext: XML PDF (PDFA);

5.

Field Equations for Lovelock Gravity: An Alternative Route
/ Chakraborty, Sumanta
We present an alternative derivation of the gravitational field equations for Lovelock gravity starting from Newton’s law, which is closer in spirit to the thermodynamic description of gravity. [...]
Published in Advances in High Energy Physics 2018 (2018) 6509045
10.1155/2018/6509045
arXiv:1704.07366v1
Fulltext: PDF XML PDF (PDFA);

6.

1/ r potential in higher dimensions
/ Chakraborty, Sumanta ; Dadhich, Naresh
In Einstein gravity, gravitational potential goes as 1/rd3 in d noncompactified spacetime dimensions, which assumes the familiar 1 / r form in four dimensions. [...]
Published in EPJC 78 (2018) 81
10.1140/epjc/s1005201855461
Fulltext: XML PDF (PDFA);

7.

Gravity stabilizes itself
/ Chakraborty, Sumanta ; SenGupta, Soumitra
We show that a possible resolution to the stabilization of an extra spatial dimension (radion) can be obtained solely in the context of gravitational dynamics itself without the necessity of introducing any external stabilizing field. [...]
Published in EPJC 77 (2017) 573
10.1140/epjc/s1005201751385
Fulltext: XML PDF (PDFA);

8.

Kinematics of radion field: a possible source of dark matter
/ Chakraborty, Sumanta ; SenGupta, Soumitra
The discrepancy between observed virial and baryonic mass in galaxy clusters have lead to the missing mass problem. [...]
Published in EPJC 76 (2016) 648
10.1140/epjc/s100520164512z
Fulltext: XML PDF (PDFA);

9.

Entropy of a generic null surface from its associated Virasoro algebra
/ Chakraborty, Sumanta ; Bhattacharya, Sourav ; Padmanabhan, T.
Null surfaces act as oneway membranes, blocking information from those observers who do not cross them (e.g., in the black hole and the Rindler spacetimes) and these observers associate an entropy (and temperature) with the null surface. [...]
Published in Physics letters B (2016)
10.1016/j.physletb.2016.10.059
Fulltext: XML PDF PDF (PDFA);

10.

Solving higher curvature gravity theories
/ Chakraborty, Sumanta ; SenGupta, Soumitra
Solving field equations in the context of higher curvature gravity theories is a formidable task. [...]
Published in EPJC 76 (2016) 552
10.1140/epjc/s1005201643940
Fulltext: XML PDF (PDFA);
