Probing Lambda-Gravity with Bose-Einstein Condensate

• URL: http://arxiv.org/abs/2409.19755v1
• Date: Sun, 29 Sep 2024 19:56:18 GMT
• Title: Probing Lambda-Gravity with Bose-Einstein Condensate
• Authors: Hector A. Fernandez-Melendez, Alexander Belyaev, Vahe Gurzadyan, Ivette Fuentes,
• Abstract summary: A novel detector concept exploits the dynamics of quantum phononic excitations in a trapped Bose-Einstein condensate (BEC) The BEC exhibits sensitivity unique to the two key components of the gravitational potential in $Lambda$-gravity. This experiment could establish the best Earth-based upper limit on $Lambda$ at $10-31$ m$-2$, marking the first laboratory-based probe of the cosmological constant.
• Score: 39.58317527488534
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We propose a precise test of two fundamental gravitational constants using a novel detector concept that exploits the dynamics of quantum phononic excitations in a trapped Bose-Einstein condensate (BEC), operable at the scale of table-top experiments. In this setup, the sensitivity is enhanced by approximately two orders of magnitude through the use of a tritter operation, which mixes phononic excitations with the BEC's ground state. The BEC exhibits unique sensitivity to the two key components of the gravitational potential in $\Lambda$-gravity: the Newtonian $GM/r$ term and the cosmological constant $\Lambda r^2$. Using state-of-the-art experimental design, we predict that the gravitational constant $G$ could be measured with an accuracy up to $10^{-17}$ N m$^2$/kg$^2$, representing an improvement by two orders of magnitude over current measurements. Moreover, this experiment could establish the best Earth-based upper limit on $\Lambda$ at $<10^{-31}$ m$^{-2}$, marking the first laboratory-based probe of the cosmological constant. Additionally, the setup allows for the measurement of the distance-dependent behaviour of each term in the gravitational potential, providing a novel means to test modified gravity theories.

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