Raghvendra Singh

Raghvendra Singh

Postdoctoral Fellow, Ariel University, Israel

About Me

I am a Postdoctoral Fellow at Ariel University, Israel, working with Prof. Sergey Bondarenko. My research focuses on the interface between gravity and quantum theory — particularly in understanding how semiclassical and quantum features of spacetime manifest at different physical regimes.

At heart I am driven by foundational questions. What does it mean for spacetime to acquire microstructure at the Planck scale? Can semiclassical consistency already hint at the rules of full quantum gravity? These puzzles guide my day‑to‑day calculations — whether I am tracking how extrinsic curvature corrects horizon entropy via a covariant Wick rotation, or showing that tidal components of the Riemann tensor set universal bounds on gravitational decoherence.

Beyond the equations I value open collaboration, clear communication, and the creative playfulness that theoretical physics affords. Whether in seminars, conferences, or impromptu whiteboard sessions, I see research as a collective endeavour: refining our questions is often as illuminating as chasing the answers.

Research Areas

Quantum & Semiclassical Gravity

Planck-scale quantum effects and their imprint on classically curved space-time.

Main Goal: Formulate covariant frameworks where classical spacetime breaks down.

Ongoing: Singularity resolution, effective actions from Wick rotations.

Output: Covariant Wick Rotation

Black Hole Physics

Interior structure, horizon thermodynamics and information retention.

Main Goal: Explore thermodynamic signatures of singularity-free interiors.

Ongoing: Quasiparticle-core models, entropy matching.

Output: Black‑Hole Interior Modelling

Foundations of Quantum Geometry

Covariant uncertainty principles and Wick-rotated metric phases.

Main Goal: Reconcile local Lorentz invariance with quantum limits.

Ongoing: Tensor GUP, path integrals, metric fluctuations.

Output: Relativistic GUP

Early-Universe Cosmology

Geometric mechanisms capable of seeding, driving and ending cosmic inflation.

Main Goal: Covariant formulation of inflation from curved Euclidean patches.

Ongoing: Geometric inflation, graceful exits via bridge geometries.

Academic Background

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PhD in Theoretical Physics

Institute of Mathematical Sciences (IMSc), Chennai

Supervisor: Sujay K. Ashok; Co-supervisor: Dawood Kothawala (IIT Madras)

Thesis: “The Role of Spacetime Curvature in Quantum Phenomena at Various Length Scales”

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MSc in Physics

Institute of Mathematical Sciences (IMSc), Chennai

Thesis Advisor: Alok Laddha (CMI)

Thesis: “Hamiltonian Formulation of Gravity”

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Talks & Conferences

PIRT 2025

"Exploring Entropy in de Sitter Space Using the Covariant Euclidean Approach"

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🏅 Best Talk Award — View Certificate

📅 July 7–10, 2025

Spontaneous Workshop XVII

"Euclidean–Lorentzian Nexus: Geometry, Entropy, and Inflation"

Workshop Page ↗

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📅 March 23–29, 2025

Publications

My research publications are indexed on Google Scholar. Click below to view them:

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Contact

Email: raghvendra.imsc@gmail.com / raghvendra@ariel.ac.il