'Unveiling In-Gap States and Majorana Zero Modes in Superconductor-Topological Insulator Bilayer model', Umesh Kumar, Rafal Rechcinski, Tatiana de Picoli, Jukka Vayrynen, and Satoshi Okamoto, [arXiv:2507.23775 (2025)]. 

'Predicting Fractionalized Multi-Spin Excitations in Resonant Inelastic X-ray Spectra of Frustrated Spin-1/2 Trimer Chains', Prabhakar, Subhajyoti Pal, Umesh Kumar, Manoranjan Kumar, and Anamitra Mukherjee, Phys. Rev. B 111, 205106 (2025).

'Softening of dd excitation in the resonant inelastic x-ray scattering spectra as a signature of Hund's coupling in nickelates', Subhajyoti Pal, Umesh Kumar, Corey Melnick, and Gabriel Kotliar, Phys. Rev. Research 7, L012066 (2025).

'Theoretical analysis of multi-magnon excitations in resonant inelastic x-ray scattering spectra of two-dimensional antiferromagnets', Subhajyoti Pal, Umesh Kumar, Prabhakar, and Anamitra Mukherjee, Phys. Rev. B 108, 214405 (2023).

'Crossover of the high-energy spin fluctuations from collective triplons to localized magnetic excitations in doped Sr14-xCaxCu24O41 cuprate ladders', Y. Tseng, J. Thomas, W. Zhang, E. Paris, P. Puphal, R. Bag, G. Deng, T. C. Asmara, V. N. Strocov, S. Singh, E. Pomjakushina, U. Kumar, A. Nocera, H. M. Rønnow, S. Johnston, T. Schmitt, npj Quantum Materials 7, 92 (2022).

'Bound by three-body interactions in antiferromagnetic spin ladder', Gary Ferkinghoff, Leanna Müller‚ Umesh Kumar, Götz S. Uhrig, and Benedikt Fauseweh, Communications Physics 5, 218 (2022).

'Unraveling higher-order contributions to the spin excitations probed using resonant inelastic x-ray scattering', Umesh Kumar, Abhishek Nag, Jiemin Li, H. C. Robarts, A. C. Walters, Mirian García-Fernández, R. Saint-Martin, A. Revcolevschi, Justine Schlappa, Thorsten Schmitt, Steve Johnston, Ke-Jin Zhou, Phys. Rev. B (Letter) 106, L060406 (2022).

'Floquet engineering of Kitaev quantum magnets', Umesh Kumar, Saikat Banerjee, Shi-Zeng Lin, Communications Physics 5, 157 (2022).

'Inverse Faraday effect in Mott insulators', Saikat Banerjee, Umesh Kumar, Shi-Zeng Lin, Phys. Rev. B (Letter) 105, L180414 (2022). 

'Particle-hole asymmetry in the dynamical spin and charge responses of corner-shared 1D cuprates', Shaozhi Li, Alberto Nocera, Umesh Kumar, and Steven Johnston, Communications Physics 4, 217 (2021).

'Spontaneous fractional Chern insulators in transition metal dichalcogenides Moire superlattices', Heqiu Li, Umesh Kumar, Kai Sun, and Shi-Zeng Lin Phys. Rev. Research 3, L032070 (2021).

'Inducing and controlling superconductivity in Hubbard honeycomb model using an electromagnetic drive', Umesh Kumar, and Shi-Zeng Lin  Phys. Rev. B 103, 064508 (2021).

'Spectroscopic signatures of next-nearest-neighbor hopping in the charge and spin dynamics of doped one-dimensional antiferromagnets', Umesh Kumar, Alberto Nocera, Gregory Price, Kenneth Stiwinter, Steven Johnston, and Trinanjan Datta Physical Review B, 102, 075134 (2020).

'Theoretical study of the spin and charge dynamics of two-leg ladders as probed by resonant inelastic x-ray scattering', Umesh Kumar, Alberto Nocera, Elbio Dagotto, and Steven Johnston Physical Review B 99, 205130 (2019).

'Probing multi-spinon excitations outside of the two-spinon continuum in the antiferromagnetic spin chain cuprate Sr2CuO3', J. Schlappa, U. Kumar, K. J. Zhou, S. Singh, M. Mourigal, V. N. Strocov, A. Revcolevschi, L. Patthey, H. M. Rønnow, S. Johnston, T. Schmitt Nature Communications 9, 5394 (2018) - (PDF).

'Computing Resonant Inelastic X-Ray Scattering Spectra Using The Density Matrix Renormalization Group Method', Alberto Nocera, Umesh Kumar, Nitin Kaushal, Gonzalo Alvarez, Elbio Dagotto, and Steven Johnston Scientific Reports 8,11080 (2018) - (PDF). 

'Multi-spinon and antiholon excitations probed by resonant inelastic x-ray scattering on doped one-dimensional antiferromagnets', Umesh Kumar, Alberto Nocera, Elbio Dagotto, and Steven Johnston New Journal of Physics 20, 073019 (2018) - (PDF).