Planck-scale physics: facts and beliefs
Diego Meschini

TL;DR
This paper critically examines the assumption that Planck-scale physics is fundamental to quantum gravity, emphasizing the need to distinguish between established facts and speculative beliefs in this area.
Contribution
It clarifies the distinction between facts and beliefs regarding the significance of the Planck scale in quantum gravity research.
Findings
Highlights the lack of empirical evidence for Planck-scale relevance
Challenges the unexamined assumption of Planck units' fundamental role
Encourages rigorous scrutiny of foundational assumptions in quantum gravity
Abstract
The relevance of the Planck scale to a theory of quantum gravity has become a worryingly little examined assumption that goes unchallenged in the majority of research in this area. However, in all scientific honesty, the significance of Planck's natural units in a future physical theory of spacetime is only a plausible, yet by no means certain, assumption. The purpose of this article is to clearly separate fact from belief in this connection.
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Taxonomy
TopicsRelativity and Gravitational Theory · Noncommutative and Quantum Gravity Theories · Quantum Mechanics and Applications
