3 papers
cond-mat.mtrl-sci2026
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…
math-ph2026
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…
cond-mat.str-el2025
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…