Madhur Mehta

“Nature is mysterious, surprising, and yet comfortingly simple...”

Heising–Simons QuRIOS Postdoctoral Fellow · UC Santa Barbara

Madhur Mehta

I am a theoretical physicist studying black holes, gravitational waves, and effective field theory.

My research develops analytic and computational frameworks that connect strong-field gravitational dynamics to observable signatures, with particular emphasis on compact-object response, dissipation, scattering, and gravitational-wave observables.

I am currently a Heising–Simons QuRIOS Postdoctoral Fellow at the University of California, Santa Barbara. I completed my PhD in Physics at The Ohio State University in 2025 under Prof. Samir D. Mathur, where I worked on black-hole thermodynamics, extremely compact objects, microscopic black-hole structure, and the information problem.

Before that, I received an integrated B.S.–M.S. degree in Physics from IISER Bhopal. I am originally from Jaipur, India.

Portrait of Madhur Mehta

Heising–Simons QuRIOS Postdoctoral Fellow
University of California, Santa Barbara

Research

I study how compact objects respond to their environments and how that response can reveal both the dynamics of general relativity and possible departures from classical black-hole behavior.

Black-hole response

I use black-hole perturbation theory and effective field theory to characterize how compact objects respond to external perturbations, including tidal interactions, scattering, absorption, and dissipation.

A central part of this work is a finite-radius effective description that connects interior or near-horizon dynamics to observables measured outside the compact object.

Black-hole perturbation theory

I study perturbations of Schwarzschild and Kerr black holes, with particular emphasis on gauge-invariant observables, finite-frequency response, fluxes, and horizon dynamics.

Current work develops gravitational response functions for Schwarzschild perturbations and extends the framework toward spinning black holes.

Quantum structure & strong-field observables

A broader goal of my research is to understand whether microscopic or higher-derivative modifications of black-hole physics can leave robust signatures in scattering or gravitational-wave observations.

My earlier work studied extremely compact objects, black-hole thermodynamics, microstate physics, and the D1–D5 conformal field theory.

Current Work

Effective descriptions of black-hole response

I am developing finite-radius effective descriptions of dynamical gravitational systems that encode internal compact-object physics in response data accessible to an exterior observer. The framework connects boundary response to scattering, absorption, tidal effects, and signal predictions.

Schwarzschild and Kerr perturbations

I am extending the response framework to gravitational perturbations, beginning with Schwarzschild black holes and moving toward rotating spacetimes. The goal is to characterize finite-frequency gravitational response using quantities that can be related directly to asymptotic observables.

Gravitational-wave signatures

I am interested in how modified near-horizon or compact-object dynamics propagates into measurable waveform effects. This includes dissipation, altered scattering and absorption, tidal response, and accumulated phase shifts in gravitational-wave signals.

Selected Publications

Selected work on black-hole response, strong-field gravity, black-hole thermodynamics, and microscopic structure.

Deriving Effective Descriptions and Signal Predictions for Dynamical Gravitational Systems

S. B. Giddings and M. Mehta

arXiv:2606.19435, 2026

Extreme Compactness, Extreme Gravity: Higher-Derivative Corrections to ECOs

M. Mehta

arXiv:2505.09049, 2025 · Gravity Research Foundation Honorable Mention

The Universal Thermodynamic Properties of Extremely Compact Objects

S. D. Mathur and M. Mehta

Classical and Quantum Gravity 41 (2024) 23, 235001

Electromagnetic Entrapment in Gravity

P. Heidmann and M. Mehta

Journal of High Energy Physics 03 (2024) 046

The Fuzzball Paradigm

S. D. Mathur and M. Mehta

arXiv:2412.09495, 2024

PhD Thesis — Through the Horizon and Back: Lifting the Veil on Black Hole Thermodynamics

The Ohio State University, 2025

View all publications on INSPIRE →

Outreach

I am interested in communicating fundamental physics through public conversations, observing programs, and informal science education.

I created Time Before Space , a science-communication channel on gravity, quantum theory, and foundational questions in physics. Interviews include Juan Maldacena, Abhay Ashtekar, Gary Horowitz, Niayesh Afshordi, Sera Markoff, and Samir Mathur.

I also work as a stargazing guide with Alta Vista Tours in the Santa Barbara area, leading small-group telescope observations and introducing guests to planets, stars, star clusters, nebulae, galaxies, constellations, and the stories and physics of the night sky.