9 citations · 13 across the 8 of their papers we have counts for
8 papers
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…
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…
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…
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…
Emergent soft-gap Anderson models at quantum criticality in a lattice Hamiltonian within dynamical mean field theory
Sujan K. K., Vinayak M. Kulkarni, N. S. Vidhyadhiraja +1
Local quantum criticality in itinerant fermion systems has been extensively investigated through the soft-gap Anderson impurity model, wherein a localized, correlated impurity, hyb…
Kondo effect in a non-Hermitian, -symmetric Anderson model with Rashba spin-orbit coupling
Vinayak M Kulkarni, Amit Gupta, N. S. Vidhyadhiraja
The non-interacting and non-Hermitian, parity-time ()-symmetric Anderson model exhibits an exceptional point (EP) at a non-Hermitian coupling , which remains unr…
Functional Renormalization analysis of Bose-Einstien Condensation through complex interaction in Harmonic Oscillator; Can Bendixson criteria be extended to complex time?
Vinayak M Kulkarni
An arbitrary form of complex potential perturbation in an oscillator consists of many exciting questions in open quantum systems. These often provide valuable insights in a realist…