Enhanced Gravitational Entanglement via Modulated Optomechanics
- URL: http://arxiv.org/abs/2209.12656v2
- Date: Mon, 6 Nov 2023 13:00:31 GMT
- Title: Enhanced Gravitational Entanglement via Modulated Optomechanics
- Authors: A. Douglas K. Plato, Dennis R\"atzel, Chuanqi Wan
- Abstract summary: We show that the rate of gravity mediated entanglement can be significantly increased by modulating the optomechanical coupling.
Modifications increase decoherence effects at the same rate as the entanglement improvements.
An immediate consequence is that probing superpositions of the gravitational field places similar demands on detector sensitivity as entanglement verification.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: The role of entanglement in determining the non-classicality of a given
interaction has gained significant traction over the last few years. In
particular, as the basis for new experimental proposals to test the quantum
nature of the gravitational field. Here we show that the rate of gravity
mediated entanglement between two otherwise isolated optomechanical systems can
be significantly increased by modulating the optomechanical coupling. This is
most pronounced for low mass, high frequency systems - convenient for reaching
the quantum regime - and can lead to improvements of several orders of
magnitude, as well as a broadening of the measurement window. Nevertheless,
significant obstacles still remain. In particular, we find that modulations
increase decoherence effects at the same rate as the entanglement improvements.
This adds to the growing evidence that the constraint on noise (acting on the
position d.o.f) depends only on the particle mass, separation, and temperature
of the environment and cannot be improved by novel quantum control. Finally, we
highlight the close connection between the observation of quantum correlations
and the limits of measurement precision derived via the Cram\'er-Rao Bound. An
immediate consequence is that probing superpositions of the gravitational field
places similar demands on detector sensitivity as entanglement verification.
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