Amresh Verma

Amresh Verma

PhD Researcher in Cosmology

Theoretical and observational cosmologist exploring the large-scale structure of the universe, with a focus on dark matter, gravitational waves, and early universe physics.

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About My Research

I'm a Doctoral Researcher at Ariel University, where I study the physics of the early Universe with a focus on gravitational waves and alternative cosmological models. My research explores how signals from the primordial Universe, such as the stochastic gravitational-wave background, can reveal clues about inflation, reheating, or even scenarios where the Universe undergoes a bounce instead of a singular beginning.

Current Focus

  • Analyzing Planck satellite data to constrain cosmological parameters
  • Studying the inhomogeneity of the Universe through different models
  • Collaborating on next-generation survey telescope calibration
  • Studying the ability of LISA to test Gravitational Wave Polarizations

Education & Experience

PhD in Astrophysics

Ariel University

2023 - Present

MS in Physics

JMI, New Delhi

2020 - 2022

BS in Physics

West Bengal State University

2017 - 2020

Publications

My research contributions to understanding the cosmos, published in leading peer-reviewed journals and presented at international conferences.

Probing the early Universe cosmology with NANOGrav: Possibilities and limitations

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Physical Review D 2023 50 citations Research

This study explores how NANOGrav data can be used to constrain early universe cosmology, including models with primordial gravitational wave backgrounds.

Gravitational-wave background in bouncing models from semi-classical, quantum and string gravity

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JCAP 2024 13 citations Research

Analyzing stochastic gravitational wave spectra in bouncing cosmological scenarios derived from semi-classical and string theory-based models.

Impact of low ell's on large-scale structure anomalies

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JCAP 2024 4 citations Research

We explore the significance of low multipole moments in explaining large-scale structure anomalies observed in cosmological surveys.

Evidence for non-cold dark matter from DESI DR2 measurements

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arXiv 2025 38 citations Research

This work presents new evidence for non-cold dark matter models based on the second data release from the DESI survey.

Disentangling the Origins of the NANOGrav Signal: Early Universe Models and ΔNeff Bounds

View Paper
JHEAp 2025 1 citation Research

We investigate potential early universe scenarios that could produce the NANOGrav signal, including bounds on effective relativistic degrees of freedom.

Total Publications: 5 | Total Citations: 100+ | H-index: 4

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Get In Touch

I'm always interested in discussing research collaborations, speaking opportunities, and innovative projects in cosmology.

Research Opportunities

I'm particularly interested in:

  • Collaborative research projects on GWs detection using PTAs
  • Machine learning applications in astrophysics
  • Conference talks and workshop participation
  • Mentoring undergraduate and graduate students
  • Science communication and public outreach
Office Hours: Mondays and Thursdays, 2:00 PM - 4:00 PM (by appointment)