18 citations · 21 across the 4 of their papers we have counts for
4 papers
Quantum Wake Dynamics from Distinct Spectroscopic Perturbations
Umesh Kumar, Gonzalo Alvarez, David Alan Tennant +1
Quantum wake dynamics in quantum magnets have recently been inferred from the dynamical spin structure factor, which probes only a restricted class of local perturbations. Here, we…
Imperfect Graphs from Unitary Matrices -- I
Wesley Lewis, Darsh Pareek, Umesh Kumar +1
Matrix representations of quantum operators are computationally complete but often obscure the structural topology of information flow within a quantum circuit \cite{nielsen2000}.…
Theoretical analysis of multi-magnon excitations in resonant inelastic x-ray scattering spectra of two-dimensional antiferromagnets
Subhajyoti Pal, Umesh Kumar, Prabhakar +1
Resonant inelastic x-ray spectroscopy (RIXS) has emerged as an important tool to explore magnetism in two-dimensional (2D) antiferromagnet realized in strongly correlated materials…
Three-body bound states in antiferromagnetic spin ladders
Gary Schmiedinghoff, Leanna Müller, Umesh Kumar +2
Stable bound quantum states are ubiquitous in nature. Mostly, they result from the interaction of only pairs of particles, so called two-body interactions, even when large complex…