PT Journal
AU Silva, JEG
   Maluf, RV
   Olmo, GJ
   Almeida, CAS
TI Braneworlds in f(Q) gravity
SO Physical Review D
JI Phys. Rev. D
PY 2022
BP 024033
EP 15pp
VL 106
IS 2
DI 10.1103/PhysRevD.106.024033
LA English
AB We propose a braneworld scenario in a modified symmetric teleparallel gravitational theory, where the dynamics for the gravitational field is encoded in the nonmetricity tensor rather than in the curvature. Assuming a single real scalar field with a sine-Gordon self-interaction, the generalized quadratic nonmetricity invariant Q controls the brane width while keeping the shape of the energy density. By considering power corrections of the invariant Q in the gravitational Lagrangian, the sine-Gordon potential is modified exhibiting new barriers and false vacuum. As a result, the domain wall brane obtains an inner structure, and it undergoes a splitting process. In addition, we also propose a nonminimal coupling between a bulk fermion field and the nonmetricity invariant Q. Such geometric coupling leads to a massless chiral fermion bound to the 3-brane and a stable tower of nonlocalized massive states.
ER