N 40.4237  ·  DUSK  ·  HORIZON ∞

Arghya Ranjan Das

PhD Candidate · Experimental High-Energy Physics

Purdue University · CMS · CERN· Fermilab

May I know what is real.
May ignorance be replaced by wisdom.
May I realize my true Self.
May there be: peace, peace, and peace.

— inspired by the Bṛhadāraṇyaka Upaniṣad

01The Universe

All of it at once. Gravity draws matter into a web across the dark. Reality runs. Perhaps, underneath, it computes. Follow one thread down.

cthe speed limit
the graininess
13.8 Gyrthe runtime so far
02The Machine

Down that thread, an instrument — a ring built to ask the web what it is made of, forty million times a second. These works are what came back.

arXiv preprint2026

On-chip probabilistic inference for charged-particle tracking at the sensor edge

Probabilistic inference implemented directly on-chip at the sensor edge for charged-particle tracking — pushing AI/ML into the detector front-end under extreme latency and power constraints.

arXiv preprintarXiv:2602.15946
arXiv preprint2026

PQuantML: A Tool for End-to-End Hardware-aware Model Compression

An end-to-end tool for hardware-aware compression of machine-learning models — structured pruning and quantization tuned for deployment under real-time, resource-constrained conditions.

arXiv preprintarXiv:2603.26595
Nucl. Instrum. Meth. A 10802025

Performance measurements of the electromagnetic calorimeter and readout electronics system for the DarkQuest experiment

Characterization of the electromagnetic calorimeter and readout electronics for DarkQuest, a beam-dump search for dark-sector particles at Fermilab.

Nucl. Instrum. Meth. A 1080arXiv:2502.20590
arXiv preprint2025

In-pixel integration of signal processing and AI/ML based data filtering for particle tracking detectors

Integrating signal processing and AI/ML data filtering directly in-pixel, reducing data volume at the earliest possible point in particle tracking detectors.

arXiv preprintarXiv:2510.07485
arXiv preprint2025

Sensor Co-design for smartpixels

Co-designing sensors and on-chip intelligence for the smart-pixels program: coupling detector design with embedded ML from the ground up.

arXiv preprintarXiv:2510.06588
Astrophys. J. 9552023

QPOs in Compact Sources as a Nonlinear Hydrodynamical Resonance: Determining Spin of Compact Objects

Modeling quasi-periodic oscillations in accreting compact sources as a nonlinear hydrodynamical resonance, and using them to constrain the spin of the central compact object.

Astrophys. J. 955arXiv:2308.09759
Eur. Phys. J. C 822022

Asymptotically flat vacuum solution for a rotating black hole in a modified gravity theory

An asymptotically flat rotating black-hole vacuum solution in a modified theory of gravity, with implications for how deviations from general relativity could show up around spinning black holes.

Eur. Phys. J. C 82arXiv:2203.07690
03The Living World

And the asking serves something alive — matter awake, the universe looking back through many windows.

FIELD 01

Particle Physics

Colliders and the Higgs sector — asking what the vacuum is made of.

CMS · Run-3 · HH→bb̄ττ
FIELD 02

Astrophysics & Gravitation

Black holes, accretion, oscillations — geometry keeping its own time.

QPOs · rotating black holes · modified gravity
FIELD 03

Machine Intelligence

Learning squeezed into silicon — models that fit where the data is born.

smart pixels · pruning · quantization
FIELD 04

Real-Time Decisions

Microsecond choices about what survives — attention as an algorithm.

trigger systems · 40 MHz
FIELD 05

Philosophy of the Universe

What reality computes, and what it costs to ask.

it from bit · the measurement problem
FIELD 06

Simulation & Spacetime

The substrate question — whether the render ever shows its seams.

emergence · the horizon
04The Signal

Almost all of what comes back is noise. Sometimes — this.

2026 · 03PQuantML preprint is out — end-to-end hardware-aware model compression
2026 · 02On-chip probabilistic inference for tracking at the sensor edge
2025 · 10Two smart-pixels preprints in one day
2025 · 02DarkQuest ECal performance paper (published in NIM A)
05The Quiet

The measurement will outlive the noise. So will the question.

“It from bit.” — J. A. Wheeler