PhD candidate in cosmology, Ariel University
I work on what the early Universe left behind in gravitational waves, and on how much of it we can actually read off the data.
My advisor is Ido Ben-Dayan, and most of my papers sit at the inference end of a problem: take a signal, the pulsar-timing background NANOGrav reported in 2023, the DESI baryon-acoustic distances, the Planck lensing amplitude, and ask which early-Universe models survive it. I write the pipelines myself, mostly in JAX, and I care about the statistics as much as the physics. I defend in late 2026.
Two things I have built are public. hd-pta is a package for pulsar-timing-array detection analysis. The narrowing universe is a visual history of how cosmological constraints tightened over thirty years, drawn from the published chains. A separate page collects my quantitative-finance and machine-learning work.
Papers
- Slowly rolling on a quantum correction
- The PTA–CMB tension and bounds on extra radiation from early-Universe models
- Cosmological constraints on non-cold dark matter from DESI DR2 measurements
- Impact of low ℓ's on large-scale structure anomalies
- Gravitational-wave background in bouncing models from semi-classical, quantum and string gravity
- Probing the early Universe cosmology with NANOGrav: possibilities and limitations
Full list on INSPIRE and Google Scholar.
Background
- 2023–
- PhD, physics, Ariel University. Thesis: Phenomenological aspects of cosmology.
- 2020–22
- MSc, physics, Jamia Millia Islamia, New Delhi.
- 2017–20
- BSc, physics, West Bengal State University.
Contact
- amreshcosmo@gmail.com
- Office
- Building 20, room 2.26, Ariel University
- Elsewhere
- GitHub, LinkedIn