Regular Article - Theoretical Physics
Fundamental energy scale of the thick brane in mimetic gravity
Institute of Theoretical Physics and Research Center of Gravitation, Lanzhou University, 730000, Lanzhou, China
2 Joint Research Center for Physics, Lanzhou University, 730000, Lanzhou, China
3 Joint Research Center for Physics, Qinghai Normal University, 810000, Xining, China
4 Lanzhou Center for Theoretical Physics, Lanzhou University, 730000, Lanzhou, Gansu, China
5 Department of Physics, Nanchang University, 330031, Nanchang, China
Accepted: 17 October 2021
Published online: 8 November 2021
In this paper, thick branes generated by the mimetic scalar field with Lagrange multiplier formulation are investigated. We give three typical thick brane background solutions with different asymptotic behaviors and show that all the solutions are stable under tensor perturbations. The effective potentials of the tensor perturbations exhibit as volcano potential, Poöschl–Teller potential, and harmonic oscillator potential for the three background solutions, respectively. All the tensor zero modes (massless gravitons) of the three cases can be localized on the brane. We also calculate the corrections to the four-dimensional Newtonian potential. On a large scale, the corrections to the four-dimensional Newtonian potential can be ignored. While on a small scale, the correction from the volcano-like potential is more pronounced than the other two cases. Combining the specific corrections to the four-dimensional Newtonian potential of these three cases and the latest results of short-range gravity experiments, we get the constraint on the scale parameter as eV, and constraint on the corresponding five-dimensional fundamental scale as TeV.
© The Author(s) 2021
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