Quantum spreading of a self-gravitating wave-packet in singularity free gravity

Abstract

In this paper we will study for the first time how the wave-packet of a self-gravitating meso-scopic system spreads in theories beyond Einstein's general relativity. In particular, we will consider a ghost-free infinite derivative gravity, which resolves the $1/r$ singularity in the potential - such that the gradient of the potential vanishes within the scale of non-locality. We will show that a quantum wave-packet spreads faster for a ghost-free and singularity-free gravity as compared to the Newtonian case, therefore providing us a unique scenario for testing classical and quantum properties of short-distance gravity in a laboratory in the near future.

9 pages, 2 figures. Version accepted for publication in EPJC

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• Light bending by a slowly rotating source in quadratic theories of gravity
• Quantum interference in external gravitational fields beyond General Relativity
• Fate of the false vacuum in string-inspired nonlocal field theory
• Gravity and the Superposition Principle