Shubham Kejriwal (he/him)

Physics Ph.D. Candidate
National University of Singapore
Science Drive 4,
Singapore-119077

About Me

Hi! My name is Shubham Kejriwal. I’m a third-year Ph.D. student in the gravitational waves group led by Prof. Alvin Chua in the department of Physics at the National University of Singapore. I primarily work on developing the data analysis pipeline for the upcoming LISA mission. I am proficient in Bayesian statistics and machine learning, with a working knowledge of general-relativistic waveform modeling.

Education

Ph.D. in Physics (2023-)
National University of Singapore, Singapore.
Thesis advisor: Prof. Alvin J. K. Chua
B.Sc. (Research) in Physics with a Minor in Mathematics (2018-2022)
Shiv Nadar University, Delhi, India.

What I Do

Research Work

I primarily work on developing different aspects of the data analysis pipeline for the upcoming space-based gravitational wave observatory LISA. Some broad directions in this context are highlighted below. You can read more about my research here and access my full list of publications here.

GW waveform modeling and inference of extreme-mass-ratio inspirals (EMRIs).
Inferring environments and beyond-GR (“beyond-vacuum-GR”) effects using the LISA mission.
Search for electromagnetic counterparts of EMRIs.

Teaching

I have contributed as a Teaching Assistant for multiple courses (both graduate and undergraduate) during my Ph.D. In my role, I have instructed tutorials, invigilated, assessed assignment submissions, and provided general guidance to class sizes of roughly 40-100 students. Here’s a full list of courses I have assisted for:

PC5252 “Bayesian Statistics and Machine Learning” (2 semesters).
COS1000 “Computational Thinking for Scientists” (3 semesters).
HS1502 “Conceptual Introduction to Machine Learning” (2 semesters).

Presentations

Below is a short list of talks and posters I have presented for various research conferences and science outreach programs. Find a full list in my Curriculum Vitae.

(Talk) 15th International LISA Symposium 2024, July 2024, University College, Dublin, Ireland.
(Talk) 27th Capra Meeting on Radiation Reaction in General Relativity, June 2024, National University of Singapore.
(Talk) LIGO Seminar, April 2024, Caltech, USA.
(Poster) Physics Engagement Camp, March 2024, National University of Singapore.

Other Contributions

I am a member of multiple international research collaborations including:

LISA Consortium (core member)
FastEMRIWaveforms (FEW) Collaboration

I also enjoy contributing to science events, by organizing them:

Local Organizing Committee member, Capra27.
Executive Committee member, Physics Graduate Students’ Society, National University of Singapore.

or by participating:

Beyond the Horizon Program, March 2025, ICTS-TIFR, India.
EMRI Search and Inference within the LISA Global Fit - Part 1, June 2025, APC, Paris, France.
Enabling Future Gravitational Wave Astrophysics in the Milli-Hertz Regime, July 2025, MIAPbP, Munich, Germany.

Find a full list of contributions in my Curriculum Vitae.

Beyond Academia

ice cave image — *Inside an ice cave on top of Katla Glacier, Iceland.*

When I am not working, I sometimes vlog. I also love travelling and trying out different cuisines (which is however a restrictive hobby being vegetarian). I am a big Formula One fan. I enjoy trekking and swimming, so I am both a mountain and a beach person!