13 citations · 34 across the 14 of their papers we have counts for
15 papers
Asymptotic Decoherence of an Unruh--DeWitt Detector in de Sitter Spacetime: Conformal versus Minimal Coupling
Kavitha A, Shagun Kaushal
We investigate the loss of coherence of a two-level Unruh--DeWitt detector coupled to massless real scalar fields in -dimensional de Sitter spacetime. Treating the detector-…
Cavity-Induced Suppression of Entanglement and Enhancement of Quantum Discord
Shagun Kaushal, Harkirat Singh Sahota
We study correlations between two Unruh-DeWitt detectors coupled to a scalar field in a cylindrical cavity. Boundary conditions strongly modify the detector-correlation dynamics re…
Cavity-controlled Inhibition of Decoherence in Accelerated Quantum Detectors
Harkirat Singh Sahota, Shagun Kaushal, Kinjalk Lochan
Vacuum fluctuations of quantum fields provide an unavoidable environment for any quantum system coupled to it. We study the interplay between boundary conditions and acceleration i…
Charged Black Hole with String Cloud Deformation: Entanglement and Chaos
Shagun Kaushal, Arpit Maurya, Sanjay Pant +1
We perform a holographic analysis of several quantum information theoretic observables entanglement entropy (EE), mutual information (MI), entanglement wedge cross section (EWCS),…
Backreaction inclusive Schwinger effect in flat and de Sitter spacetimes via a self consistent Maxwell Schrodinger semiclassical dynamics
Shagun Kaushal, Suprit Singh
We employ a self consistent framework to study the backreaction effects of particle creation in the coupled semiclassical dynamics of a quantum complex scalar field and a classical…
Fermionic entanglement in the presence of background electric and magnetic fields
Shagun Kaushal
In this study, we investigate the fermionic Schwinger effect in the presence of a constant magnetic field within dimensional Minkowski spacetime, considering both constant…
Entanglement generation between Unruh-DeWitt detectors in the de Sitter spacetime-analysis with complex scalar fields
Shagun Kaushal, Sourav Bhattacharya
We investigate the entanglement generation or harvesting between two identical, comoving Unruh-DeWitt detectors in the cosmological de Sitter spacetime. The detectors are assumed t…
Strong gravitational lensing of a five-dimensional charged, equally rotating black hole with a cosmological constant
Md Sabir Ali, Shagun Kaushal, Yu-Xiao Liu
We study the lensing phenomena of the strong gravity regime of five-dimensional charged, equally rotating black holes with a cosmological constant, familiarly known as the Cveti\v…
Aspects of entanglement with background electric and magnetic fields in quantum field theoretic systems
Shagun Kaushal
This thesis investigates the impact of the background magnetic field on correlations or entanglement between pairs created by the background electric field in quantum field theoret…
Stationary black holes and stars in the Brans-Dicke theory with revisited
Md Sabir Ali, Sourav Bhattacharya, Shagun Kaushal
It was shown a few years back that for a stationary regular black hole or star solution in the Brans-Dicke theory with a positive cosmological constant , endowed with a de Sitte…
Decoherence and entropy generation in an open quantum scalar-fermion system with Yukawa interaction
Sourav Bhattacharya, Nitin Joshi, Shagun Kaushal
We have studied the decoherence mechanism in a fermion and scalar quantum field theory with the Yukawa interaction in the Minkowski spacetime, using the non-equilibrium effective f…
Schwinger effect and a uniformly accelerated observer
Shagun Kaushal
This article investigates the Schwinger effect for fermions with background electric and magnetic fields of constant strengths from the point of view of a uniformly accelerated or…
Gravitational lensing for stationary axisymmetric black holes in Eddington-inspired Born-Infeld gravity
Md Sabir Ali, Shagun Kaushal
The recent years witnessed a surge of interest of the lensing of the black holes arising from general as well as other modified theories of gravity due to the experimental data ava…
Fermionic Bell violation in the presence of background electromagnetic fields in the cosmological de Sitter spacetime
Md Sabir Ali, Sourav Bhattacharya, Shankhadeep Chakrabortty +1
The violation of the Bell inequality for Dirac fermions is investigated in the cosmological de Sitter spacetime, in the presence of background electromagnetic fields of constant st…
Background magnetic field and quantum correlations in the Schwinger effect
Sourav Bhattacharya, Shankhadeep Chakrabortty, Hironori Hoshino +1
In this work we consider two complex scalar fields distinguished by their masses coupled to constant background electric and magnetic fields in the -dimensional Minkowski sp…