6 papers
Generalized Shift Vector as the Intrinsic Dipole of Many-Body Correlated Electronic States
Jiaming Hu, Sudipta Kundu, Zhichao Guo +4
Shift vectors play a central role in nonlinear optics and transport phenomena, where they are usually understood as charge-center shifts associated with transitions between quantum…
Exchange-mediated exciton splitting and linear dichroism in monolayer transition metal dichalcogenide induced by ferroelectric substrates
Sudipta Kundu, Felipe H. da Jornada
Valley-polarized excitons in two-dimensional transition metal dichalcogenides (TMDs) offer a promising platform for quantum applications, yet the addressability and decoherence of…
Moiré enabled spin pumping and preservation in MoSe2/WS2 heterobilayers
Leo Yu, Kateryna Pistunova, Sudipta Kundu +5
The spin degree of freedom is a fundamental quantum mechanical attribute with implications spanning from magnetism to quantum computing. Consequently, the relaxation of spin states…
Transition Metal Dichalcogenide Excitons in Periodic Electrostatic Potentials: Center-of-Mass Models
Jose M. Torres-Lopez, Sudipta Kundu, Felipe H. da Jornada +2
Two-dimensional (2D) van-der-Waals materials are a promising platform for exciton state engineering. In this paper, we study the properties of excitons in 2D group VI transition-me…
Mixed Stochastic-Deterministic Approach for Many-Body Perturbation Theory Calculations
Aaron R. Altman, Sudipta Kundu, Felipe H. da Jornada
We present an approach for GW calculations of quasiparticle energies with quasi-quadratic scaling by approximating high-energy contributions to the Green's function in its Lehmann…
An Adaptive Modulation Scheme for Two-user Fading MAC with Quantized Fade State Feedback
Sudipta Kundu, B. Sundar Rajan
With no CSI at the users, transmission over the two-user Gaussian Multiple Access Channel with fading and finite constellation at the input, is not efficient because error rates wi…