Sudden Decoherence by Resonant Particle Excitation for Testing Gravity-Induced Entanglement

Abstract

We propose a novel method to probe gravity-induced entanglement. We consider the gravitational interaction between a particle trapped in a shallow potential and a harmonic oscillator. The harmonic oscillator is in a quantum superposition of two frequencies and only one of these states can excite the trapped particle via resonance. Once the excited particle is detected, the quantum state of the oscillator is collapsed, which can be observed as the sudden disappearance of the superposition of oscillator frequencies. Thus, the sudden decoherence, which is only triggered by particle detection, can be a smoking gun evidence of gravity-induced entanglement. Since the probability of particle excitation increases linearly with time, the total probability is multiplied by repeating experiments. We will also discuss experimental implementations using optomechanics.

16 pages, 5 figure. Accepted for publication in Physical Review D

References in corpus (18)

• Cavity Optomechanics
• On the volume of the set of mixed entangled states
• A Spin Entanglement Witness for Quantum Gravity
• Gravitationally-induced entanglement between two massive particles is sufficient evidence of quantum effects in gravity
• New Test of the Gravitational $1/r^2$ Law at Separations down to 52 $\mu$m
• The Schrödinger-Newton equation and its foundations
• Gravitational Decoherence
• Schrödinger cat states of a 16-microgram mechanical oscillator
• Observable quantum entanglement due to gravity
• A classical channel model for gravitational decoherence
• Sourcing semiclassical gravity from spontaneously localized quantum matter
• Problems with the Newton-Schrödinger Equations
• A Fabry-Perot Microcavity for Diamond-Based Photonics
• Decoherence effects in non-classicality tests of gravity
• Enhancing Gravitational Interaction between Quantum Systems by a Massive Mediator
• The gravity-related decoherence master equation from hybrid dynamics
• Coherence limits in lattice atom interferometry at the one-minute scale
• Enhancement of quantum gravity signal in an optomechanical experiment