5 papers
Chirality loss during brane merging: a universal power law from the Jackiw-Rebbi index
H. P. Pinheiro, C. A. S. Almeida
We investigate the rate at which chiral fermion localisation is lost when two domain walls merge in extra-dimensional braneworld scenarios, using the -dimensional Jackiw-Reb…
Operator ordering as an emergent geometric background in Dirac systems with spatially varying mass
C. A. S. Almeida
We investigate the spectral consequences of the uniquely determined Hermitian ordering of the Dirac Hamiltonian with spatially varying mass. In contrast to the nonrelativistic case…
Aharonov--Casher effect from a supersymmetric N=1 D=4 model with Kalb--Ramond Lorentz-violating background: a SUSY-preserving mechanism via the Fayet--Iliopoulos term
L. A. S. Nunes, C. A. S. Almeida
The Aharonov--Casher (AC) effect describes the geometric phase acquired by a neutral particle carrying a magnetic dipole moment moving in an external electric field. In supersymmet…
Gravitationally induced wave-function collapse from dynamical bifurcation
C. A. S. Almeida
We propose an effective non-relativistic framework in which wave-function collapse emerges as a deterministic dynamical instability induced by gravitational self-interaction and re…
Chiral Fermion Localization in Two-Kink Scalar Backgrounds: Tunable Brane Positioning and Universal Divergence at the Single-Kink Limit
H. P. Pinheiro, C. A. S. Almeida
The localization of chiral fermionic zero modes in scalar field backgrounds with domain wall structure is a central mechanism in brane-world scenarios. We investigate this mechanis…