5 papers
Classical observable coalescence as a discriminating diagnostic for spectral degeneracies in non-Hermitian systems
P. K. Nkaimbi, C. A. Mba, A. B. Moubissi +4
Exceptional points (EPs) are conventionally identified through eigenvector coalescence, inaccessible in classical platforms lacking a Hamiltonian spectrum. We introduce classical o…
Shortcut to Adiabatic Transfer in a Four-Level N-type System using Counterdiabatic Driving
Marius Romuald Kamsap, Simon Evehe Ndong, Maïk Delon Mboumba +5
The stimulated Raman shortcut-to-adiabatic passage (STIRSAP) technique has been demonstrated to accelerate adiabatic population transfer processes. Traditionally applied to three-l…
Topologically Protected Learning from Exceptional Point Braiding: Toward Braid Programming
M. N. Jipdi, C. Avomo Mba, A. B. Moubissi +2
We present a framework for topological learning based on exceptional point (EP) braiding in a non-Hermitian Bogoliubov-de Gennes Hamiltonian. A closed algebraic equation for the EP…
Longitudinal-Field-Driven Transition in a non-integrable Non-Hermitian Transverse-Field Ising Chain via RBMs
M. E. Ateuafack, M. R. Kamsap, J. T. Diffo +2
We investigate the ground-state properties and quantum critical behavior of a non-Hermitian transverse-field Ising chain subjected to longitudinal and complex transverse magnetic f…
On decoherence induced by a spin chain: role of initial prepared states
L. T. Kenfack, M. R. T. Fokou, M. Tchoffo +2
We study the decoherence process induced by a spin chain environment on a central spin consisting of R spins and we apply it on the dynamics of quantum correlations (QCs) of three…