Decoherence from the light bending interaction

Abstract

We analyse a decoherence effect, caused by the gravitational interaction between a massive body and the electromagnetic field. Assuming a quantum version of the light bending interaction, we show that it leads to decoherence of the mass if the light is not observed. Using the extreme weakness of the gravitational coupling, we derive explicitly the decoherence lengthscales for general states of the central mass and for both thermal and coherent light. Predictably, the effect is very faint for anything but hugely energetic light, however from the fundamental point of view of co-existence of both gravitation and quantum theories, it is there. Since effectively the studied system is a quantum optomechanical system, we hope our results, properly rescaled, will be also useful in optomechanics.

References in corpus (13)

• Cavity Optomechanics
• A Spin Entanglement Witness for Quantum Gravity
• Gravitationally-induced entanglement between two massive particles is sufficient evidence of quantum effects in gravity
• Quantum Darwinism
• A Scheme to Probe the Decoherence of a Macroscopic Object
• Universal decoherence due to gravitational time dilation
• Quantum limit of decoherence: Environment induced superselection of energy eigenstates
• Roads to objectivity: Quantum Darwinism, Spectrum Broadcast Structures, and Strong quantum Darwinism -- a review
• Gravitational Optomechanics: Photon-Matter Entanglement via Graviton Exchange
• Dynamical Objectivity in Quantum Brownian Motion
• Information transfer during the universal gravitational decoherence
• Gaussian Decoherence and Gaussian Echo from Spin Environments
• Pointer States in the Born-Markov approximation