10 papers
Anomaly quenching and dynamical cooling of Hawking evaporation in Horndeski gravity
Amogh Srivastav, S. Shankaranarayanan
We investigate the semiclassical Hawking evaporation of a two-dimensional Callan-Giddings-Harvey-Strominger (CGHS) black hole perturbed by first-order Horndeski scalar-tensor coupl…
Resolution of Infrared Entanglement Divergences via the Extended Uncertainty Principle
Subhra Mondal, S. Shankaranarayanan
The entanglement entropy of quantum systems typically exhibits both ultraviolet and infrared (IR) divergences. In the low-frequency limit, the IR divergence is intimately tied to t…
Finite 4-D Gauss-Bonnet quantum corrections from matter-graviton interactions in a curved background
Apurv Keer, S. Shankaranarayanan
The Glavan-Lin proposal for 4D Einstein-Gauss-Bonnet (EGB) gravity introduces a singular dimensional scaling to bypass Lovelock's theorem, though its fundamental origin remains deb…
Emergent Hawking Radiation and Quantum Sensing in a Quenched Chiral Spin Chain
Nitesh Jaiswal, S. Shankaranarayanan
We investigate the emergence and detection of Hawking radiation (HR) in a 1D chiral spin chain model, where the gravitational collapse is simulated by a sudden quantum quench that…
Gravitational wave detection via photon-graviton scattering and quantum interference
K. Hari, S. Shankaranarayanan
We present a fully quantum field-theoretic framework for gravitational wave (GW) detection in which the interaction is described as photon-graviton scattering. In this picture, the…
Quantum Cosmology as a Hydrogen atom: Discrete and cyclic Universes from Wheeler-DeWitt quantization
Dipayan Mukherjee, Harkirat Singh Sahota, S. Shankaranarayanan
Building upon our recently established correspondence between quantum cosmology and the hydrogen atom [1], we investigate the specific sector of a negative cosmological constant ($…
Covariant Carrollian Electric and Magnetic Limits of General Relativity
Tanmay Patil, S. Shankaranarayanan
The Carrollian limit () of General Relativity provides the geometric language for describing null hypersurfaces, such as black hole event horizons and null infinity. Motiv…
Axial quasi-normal modes of slowly rotating black holes in dynamical Chern-Simons gravity to second-order in spin and coupling
Tharaka Alapati, S. Shankaranarayanan
We compute the quasi-normal mode (QNM) frequencies of slowly rotating black holes in dynamical Chern-Simons (dCS) gravity, including corrections up to second order in the black hol…
Unitary quantum matter-bounce in a universe with a positive cosmological constant
Harkirat Singh Sahota, Dipayan Mukherjee, S. Shankaranarayanan
We analyze the Wheeler-DeWitt quantization of a spatially flat Friedmann-Lemaître-Robertson-Walker universe containing pressureless dust and a positive cosmological constant ($Λ> 0…
Distinguishing bounce and inflation via quantum signatures from cosmic microwave background
S. Mahesh Chandran, S. Shankaranarayanan
Cosmological inflation is a popular paradigm for understanding Cosmic Microwave Background Radiation (CMBR); however, it faces many conceptual challenges. An alternative mechanism…