Author

M. E. Ateuafack

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Preprint Oct 2026

Classical observable coalescence as a discriminating diagnostic for spectral degeneracies in non-Hermitian systems

Exceptional points (EPs) are conventionally identified through eigenvector coalescence, inaccessible in classical platforms lacking a Hamiltonian spectrum. We introduce classical observable coalescence as a diagnostic identifying EPs directly from physical configurations, and demonstrate it in a known non-Hermitian Isi...

P. K. Nkaimbi, C. Mba, A. Moubissi et al. · 0 citations

Preprint Aug 2026

Longitudinal-Field-Driven Transition in a non-integrable Non-Hermitian Transverse-Field Ising Chain via RBMs

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 fields. To address this interacting many-body problem, we employ real-valued neural quantum states based on Restricted Boltzmann Machines (RB...

M. E. Ateuafack, M. Kamsap, J. Diffo et al. · 0 citations