A (Strictly) Contemporary Perspective on TransPlanckian Censorship
Abstract
I critically discuss a controversial `transPlanckian censorship' conjecture, which has recently been introduced to researchers working at the intersection of fundamental physics and cosmology. My focus explicitly avoids any appeals to contingent research within string theory (the sociological origins of the conjecture) or regarding the more general (quantum) gravitational `swampland'. Rather, I concern myself with the conjecture's foundations in our current, welltrodden physics of quantized fields, spacetime, and (classical) gravity. In doing so, I locate what exactly within transPlanckian censorship amounts to a departure from current physics—identifying what is, ultimately, so conjectural about the conjecture.
 Publication:

Foundations of Physics
 Pub Date:
 August 2022
 DOI:
 10.1007/s10701022005937
 arXiv:
 arXiv:2205.11620
 Bibcode:
 2022FoPh...52...76S
 Keywords:

 TransPlanckian censorship conjecture;
 Semiclassical gravity;
 Quantum field theory on curved spacetime;
 Inflationary cosmology;
 Quantum gravity phenomenology;
 General Relativity and Quantum Cosmology;
 Physics  History and Philosophy of Physics
 EPrint:
 Accepted at Foundations of Physics