1 citations · 1 across the 2 of their papers we have counts for
5 papers
Emergent $\PT$ Symmetry and Exceptional Points in a Driven Dirac Impurity
Vinayak M. Kulkarni
Periodic driving can generate passive non-Hermitian impurity dynamics without microscopic gain. We derive this mechanism for an inversion-asymmetric spin--orbit-coupled Dirac impur…
Quantum weight and low-loss EELS signatures of Wannier quantum geometry in black phosphorus
Vinayak M. Kulkarni, Sharona Horta
Quantum geometry is now experimentally accessible in crystalline solids, with black phosphorus providing a key platform through polarization-resolved angle-resolved photoemission s…
Jordan-Twist Bethe Ansatz and Many-Body Exceptional-Point Amplification in the Finite- Anderson Impurity
Vinayak M. Kulkarni
We construct an interacting integrable realization of many-body exceptional-point amplification in the static equal-velocity linearized finite- Anderson impurity. Two spin-orbit…
Derivation of a $\PT$-Symmetric Sine-Gordon Model from a Nonequilibrium Spin-Boson System via Keldysh Functional Integrals
Vinayak M. Kulkarni
We present a microscopic derivation from a nonequilibrium spin-boson model to a $\PT$-symmetric non-Hermitian sine-Gordon (SG) effective theory, via the Keldysh functional-integral…
Anderson Impurities In Edge States with Nonlinear and Dissipative Perturbations
Vinayak M. Kulkarni, N. S. Vidhyadhiraja
We show that exceptional points (EPs) and non-Hermitian behavior can emerge dynamically in impurity models with Hermitian microscopic origins. Using perturbative renormalization gr…