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debosmita-sarkar/README.md

Debosmita Sarkar

Independent Physicist & Computational Astrophysicist · Kolkata, India

I am an independent researcher in gravitational physics and computational astrophysics. My work centers on the numerical simulation of gravitational N-body systems, the mathematics of deterministic chaos, and the fundamental limits of long-term prediction.

I am the author of a provenance-audited gravitational world simulator validated against NASA JPL's DE440 ephemeris, and of the Fidelity–Limit Theorem — a closed-form characterization of the predictability horizon of chaotic dynamical systems.

🔭 Research

  • Fidelity–Limit Theorem — a closed-form predictability horizon for chaotic systems, binding integrator order, step size, the largest Lyapunov exponent, measurement uncertainty, and tolerance. Its measurement-ceiling corollary shows that beyond a computable point, prediction is limited by how well reality is measured, not by computing power.
  • Gravitational World Simulator — built only from proven physics, with every constant traced to a cited source by an automated provenance audit. It reproduces Mercury's relativistic perihelion advance as 42.99″/century (0.03% from the observed value) and independently recovers the established ~100-million-year predictability horizon of the solar system.

📄 Paper

A Provenance-Audited Gravitational World Simulator Validated Against DE440 with a Formal Predictability Analysis (2026). Zenodo · DOI: 10.5281/zenodo.21329246

🔗 Links

🧭 Fields

gravitational physics · computational astrophysics · celestial mechanics · N-body simulation · deterministic chaos · predictability horizons · symplectic integration · general relativity (post-Newtonian)

Note: This is the profile of Debosmita Sarkar, the independent physicist / computational astrophysicist in Kolkata, India, working on gravitational simulation and the Fidelity–Limit Theorem — distinct from others who may share the name.

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  1. gravitational-world-simulator gravitational-world-simulator Public

    Debosmita Sarkar — Independent Researcher, Kolkata, India. A provenance-audited gravitational N-body world simulator validated against NASA JPL DE440, introducing the Fidelity–Limit Theorem: a clos…

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  2. debosmita-sarkar debosmita-sarkar Public

    Profile README for Debosmita Sarkar — independent physicist in Kolkata, author of the Fidelity–Limit Theorem.