Kazi Abu Rousan
Profile
I'm Kazi Abu Rousan, a PhD student in Cosmology at NISER, with a Master's degree in Physics (High-Energy Physics) from the Indian Association for the Cultivation of Science (IACS). I work on the physics of the early universe, build small scientific tools in Julia, Python and R, and care a lot about teaching and science communication — I create expository articles, videos, and animations, and have mentored students for the Physics and Mathematics Olympiads.
Research Interests
My current research is on primordial gravitational waves and inflation, the study of galactic dust and its cross-correlation with the Cosmic Infrared Background (CIB), and modified theories of gravity — I'm currently writing a paper in this area with collaborators in theoretical physics. More broadly, I'm interested in early-universe cosmology and cosmological perturbation theory (the long-term goal of my Julia package Cosmic.jl), along with non-commutative quantum mechanics and time crystals, and computational and numerical methods for physics.
Education
Experience
NISER, Bhubaneswar — PhD (ongoing) — School of Physical Sciences (Cosmology).
NISER, Bhubaneswar — Junior Research Fellow (completed) — School of Earth and Planetary Sciences; worked on a project in collaboration with the Max Planck Society.
Cheenta Ganit Kendra, Kolkata — Mentor (former) — Physics teacher for the Physics Olympiad, and content creator on Cheenta's YouTube channel.
Chegg, Kolkata — Advanced Physics Expert.
S. N. Bose National Centre for Basic Sciences — Summer Project Student — Can the time-crystal nature arise naturally from Non-Commutative Quantum Mechanics? (under Prof. Archan S. Majumdar).
Introduction to Astronomy Research — Summer School (2023) — Mentor for the course on using NumPy, SciPy and Astropy for data analysis.
Publications & Selected Work
Method of Images and its Relation to Optical Images — Resonance (Springer). DOI: 10.1007/s12045-022-1398-y. How optical lens formulas mirror the electrostatic method of images.
Diffraction patterns from different orientations of rectangular apertures — submitted to Resonance. Based on a TIFR problem; how diffraction patterns change with aperture configuration, simulated in Python.
A new formula for \(\pi\) — discovered while extending the Gauss circle problem to a triangular grid; published in MSAST 2022, Kolkata.
Introduction to Anyons and a Generalized Distribution Function — my B.Sc. project: a generalized distribution function for anyons that recovers the Bose–Einstein and Fermi–Dirac distributions as special cases.
Time Crystal as a consequence of Non-Commutative Quantum Mechanics for a 2D Harmonic Oscillator — 2023 summer project at the S. N. Bose National Centre for Basic Sciences.
Basic Recombination and Formation of Neutral Hydrogen in the Early Universe — the mechanism of recombination, including a discussion of Peebles' equation.
Power Logarithmic Inequality — Romanian Mathematical Magazine.
Software & Tools
Cosmic.jl — a Julia package I'm developing for basic cosmology computations, aimed eventually at cosmological perturbations.
astronomR — an R package for astronomy and astrophysics, developed with Samrit Pramanik.
Radiometric Calibration of the DAWN VIR dataset — I built a web app for the calibration: upload
.lbl,.qub, and house-keeping data, then download the calibrated.npyfile.
Teaching & Outreach
Olympiad mentoring — previously mentored students in Mathematics and Physics for the Olympiads at Cheenta Ganit Kendra.
Mentor, Introduction to Astronomy Research — Summer School (2023): authored the notes and assignments on Matplotlib, NumPy, SciPy and Astropy (materials, course).
Instructor (Python) for Approaching Computational Thinking with R + Python, organised by Cosmic Charade.
Upcoming book on Number Theory — the first chapter is linked.
Expository articles on Medium: What is the Fourier Series? And its Beauty (with a video), and Trapezoidal Rule: a method of numerical integration.
Digital art — see some of it here.
Skills
Beyond Research
And of course, my cat — Mr. Gino!
