Quantumness of gravity in harmonically trapped particles
- URL: http://arxiv.org/abs/2207.11848v2
- Date: Sat, 10 Dec 2022 06:53:51 GMT
- Title: Quantumness of gravity in harmonically trapped particles
- Authors: Youka Kaku, Shin'ya Maeda, Yasusada Nambu, Yuki Osawa
- Abstract summary: We evaluate interference visibility considering a particle with internal energy levels in a harmonic trapping potential.
For a spatially superposed gravitational source mass, interference visibility exhibits collapse and revival behavior.
We also examined the temporal behavior of entanglement negativity and found that the nonrevival behavior of visibility reflects the creation of the entanglement between the internal energy state and the external source state.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: This study investigates the quantumness of gravity under the setup of the
atomic interferometry from the viewpoint of mass-energy equivalence. We
evaluated interference visibility considering a particle with internal energy
levels in a harmonic trapping potential. As per the result, for a spatially
superposed gravitational source mass, interference visibility exhibits collapse
and revival behavior, which implies that an initial separable internal state
evolves to the entangled state with respect to the degrees of freedom of the
center of mass, the internal energy levels, and the external source state. In
particular, it does not exhibit revival behavior when gravity is treated as a
quantum interaction, while it revives with a finite period for a semiclassical
treatment of gravity. We also examined the temporal behavior of entanglement
negativity and found that the nonrevival behavior of visibility reflects the
creation of the entanglement between the internal energy state and the external
source state which is uniquely induced by the quantum interaction of gravity in
accordance with the weak equivalence principle.
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