4 papers · 1 filter
Two flavor neutrino oscillations in presence of non-Hermitian dynamics
Kritika Rushiya, Gaurav Hajong, Bhabani Prasad Mandal +1
We develop a consistent mathematical framework for studying two flavor neutrino oscillations in presence of non-Hermitian dynamics. We consider two approaches : (a) bi-orthonormal…
Emergence of Hermitian topology from non-Hermitian knots
Gaurav Hajong, Ranjan Modak, Bhabani Prasad Mandal
The non-Hermiticity of the system gives rise to a distinct knot topology in the complex eigenvalue spectrum, which has no counterpart in Hermitian systems. In contrast, the singula…
Modified Hellmann Feynman Theorem
Gaurav Hajong, Bhabani Prasad Mandal
We review the well-known Hellmann Feynman Theorem (HFT), originally developed for Hermitian systems to facilitate the calculation of forces among the molecules. Our work extends th…
Hellmann Feynman Theorem in Non-Hermitian system
Gaurav Hajong, Ranjan Modak, Bhabani Prasad Mandal
We revisit the celebrated Hellmann-Feynman theorem (HFT) in the PT invariant non-Hermitian quantum physics framework. We derive a modified version of HFT by changing the definition…