Covariant bandlimitation from Generalized Uncertainty Principles
arXiv:1903.12160 · doi:10.1088/1742-6596/1275/1/012025
Abstract
It is widely believed that combining the uncertainty principle with gravity will lead to an effective minimum length scale. A particular challenge is to specify this scale in a coordinate-independent manner so that covariance is not broken. Here we examine a class of Lorentz-covariant generalizations of the uncertainty principle which aim to provide an effective low-energy model for a Lorentz-invariant minimum length. We show how this modification leads to a covariant bandlimitation of quantum field theory. However, we argue that this does not yield an adequate regulator for many quantities of interest, e.g., the entanglement entropy between spatial regions. The possibility remains open that it could aid in regulating interactions.
arXiv commentv2: Added reference. v1: Prepared for proceedings of the Ninth International Workshop DICE2018 Spacetime - Matter - Quantum Mechanics (held Castello Pasquini/Castiglioncello (Tuscany), Italy, 17-21 September 2018). JPCS format
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