39 citations · 141 across the 14 of their papers we have counts for
14 papers
Analogue Hawking radiation as a tunneling in a two-level -symmetric system
Bijan Bagchi, Rahul Ghosh, Sauvik Sen
In the light of a general scenario of a two-level non-Hermitian -symmetric Hamiltonian we apply the tetrad-based method to analyze the possibility of analogue Hawking…
Dirac equation in curved spacetime: the role of local Fermi velocity
B. Bagchi, A. Gallerati, R. Ghosh
We study the motion of charge carriers in curved Dirac materials, in the presence of a local Fermi velocity. An explicit parameterization of the latter emerging quantity for a nano…
Refractive index profiles for a -symmetric optical structure
Bijan Bagchi, Rahul Ghosh, Sauvik Sen
By mapping the scalar Helmholtz equation (SHE) to the Schrodinger form we investigate the behaviour of optical structure when the refractive index distribution a…
So (2, 1) algebra, local Fermi velocity, and position-dependent mass Dirac equation
Bijan Bagchi, Rahul Ghosh, Christiane Quesne
We investigate the (1+1)-dimensional position-dependent mass Dirac equation within the confines of so(2,1) potential algebra by utilizing the character of a spatial varying Fermi v…
Non-hermitian Dirac Hamiltonian in the presence of local Fermi velocity
Rahul Ghosh
We present a new approach to study a class of non-Hermitian (1+1)-dimensional Dirac Hamiltonian in the presence of local Fermi velocity. We apply the well known Nikiforov-Uvarov me…
Exceptional point in a coupled Swanson system
Bijan Bagchi, Rahul Ghosh, Sauvik Sen
We propose an interacting nonhermitian model described by a two-mode quadratic Hamiltonian along with an interaction term to locate and analyze the presence of an exceptional point…
Position-dependent mass Dirac equation and local Fermi velocity
Rahul Ghosh
We present a new approach to study (1+1)-dimensional Dirac equation in the background of an effective mass by exploiting the possibility of a position-dependent fermi velocity…
Dirac Hamiltonian in a supersymmetric framework
Bijan Bagchi, Rahul Ghosh
We investigate the most general form of the one-dimensional Dirac Hamiltonian in the presence of scalar and pseudoscalar potentials. To seek embedding of supersymmetry (SUSY)…
Reconstruction of gravity with ordinary and entropy-corrected type Holographic dark energy model
Rahul Ghosh, Ujjal Debnath
We have discussed the correspondence of the well-accepted gravity theory with two dark energy models : -type holographic dark energy [-type HDE] and entropy-co…
Behaviour of interacting Ricci dark energy in logarithmic f(T) gravity
Rahul Ghosh, Surajit Chattopadhyay
In the present work we have considered a modified gravity dubbed as "logarithmic gravity" and investigated the behavior of Ricci dark energy interacting with pressureless da…
The generalized second law of thermodynamics in f(R) gravity for various choices of scale factor
Rahul Ghosh, Surajit Chattopadhyay
The present study is aimed at investigating the validity of the generalized second law (GSL) of thermodynamics in gravity. Choosing [followin…
Generalized second law of thermodynamics in the emergent universe for some viable models of f(T) gravity
Rahul Ghosh, Antonio Pasqua, Surajit Chattopadhyay
The present study is motivated by the study of reference [1], where the generalized second law of thermodynamics has been investigated for a flat FRW universe for two viable models…
A study of generalized second law of thermodynamics in modified f(R) Horava-Lifshitz gravity
Surajit Chattopadhyay, Rahul Ghosh
This work investigates the validity of the generalized second law of thermodynamics in modified f(R) Horava-Lifshitz gravity proposed by Chaichian et al (2010) [Class. Quantum Grav…
A Dark Energy Model with Generalized Uncertainty Principle in the Emergent, Intermediate and Logamediate Scenarios of the Universe
Rahul Ghosh, Surajit Chattopadhyay, Ujjal Debnath
This work is motivated by the work of Kim et al (2008), which considered the equation of state parameter for the new agegraphic dark energy based on generalized uncertainty princip…