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We investigate the resonant regime of a mesoscopic cavity made of graphene ora doped beam splitter. Using Non-Hermitian Quantum Mechanics, we consider theBender-Boettcher assumption that a system must obey parity and time reversalsymmetry. Therefore, we describe such system by coupling chirality, parity andtime reversal symmetries through the scattering matrix formalism and apply itin the shot noise functions, also derived here. Finally we show how to achievethe resonant regime only by setting properly the parameters concerning thechirality and the PT symmetry.

Tunable ${\cal \chi/PT}$ Symmetry in Noisy Graphene