A New Approach to Generalised Uncertainty Relations

Abstract

We outline a new model in which generalised uncertainty relations are obtained without modified commutation relations. While existing models introduce modified phase space volumes for the canonical degrees of freedom, we introduce new degrees of freedom for the background geometry. The phase space is therefore enlarged but remains Euclidean. The spatial background is treated as a genuinely quantum object, with an associated state vector, and the model naturally gives rise to the extended generalised uncertainty principle (EGUP). Importantly, this approach solves (or rather, evades) well known problems associated with modified commutators, including violation of the equivalence principle, the `soccer ball' problem for multiparticle states, and the velocity dependence of the minimum length. However, it implies two radical conclusions. The first is that space must be quantised on a different scale to matter and the second is that the fundamental quanta of geometry are fermions. We explain how, in the context of the model, these do not contradict established results including the no go theorems for multiple quantisation constants, which still hold for species of material particles, and the spin-$2$ nature of gravitons.

Accepted for publication in Touring the Planck Scale: Antonio Aurilia Memorial Volume, P. Nicolini, ed., Fundamental Theories of Physics, Springer. 47 pages, no figures. Minor typos corrected (v4)

References in corpus (9)

• The Generalized Uncertainty Principle in (A)dS Space and the Modification of Hawking Temperature from the Minimal Length
• Trace Anomaly in Quantum Spacetime Manifold
• Hybrid classical-quantum formulations ask for hybrid notions
• Nonlocal and generalized uncertainty principle black holes
• Hausdorff dimension of a particle path in a quantum manifold
• Constraints on Spatially Oscillating Sub-mm Forces from the Stanford Levitated Microsphere Experiment Data
• Testing Generalised Uncertainty Principles through Quantum Noise
• Canonical bracket in quantum-classical hybrid systems
• Is there a connection between "dark" and "light" physics?

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• Series solution of the time-dependent Schrödinger-Newton equations in the presence of dark energy via the Adomian Decomposition Method