Work

Inaccessibility of the Cosmological Singularity to Quantum Probes

Year: 2026

Type: preprint

Abstract: We propose an operational resolution of the FLRW big bang singularity using quantum probes satisfying a curvature coupled Klein-Gordon equation. Applying the Madelung-Bohm decomposition of a Klein-Gordon field on a classical near-singularity FLRW background, we show that the induced conformal geometry renders curvature invariants finite and makes past directed causal geodesics complete. The classical big bang surface is therefore inaccessible to this class of quantum probes in finite effective proper time, while the underlying FLRW spacetime remains singular.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2610.30071

Authors: Cheriyodathillathu, Vishnulal, Das, Saurya, Basak, Soumen, Patil, Tanmay

Institutions: Indian Institute of Science Education and Research Thiruvananthapuram, University of Lethbridge, Imperial College London

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Council of Scientific and Industrial Research, India, Natural Sciences and Engineering Research Council of Canada

OpenAlex ID: W7223228428

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