288 citations · 608 across the 20 of their papers we have counts for
8 papers · 1 filter
Diffusive transport in a quasiperiodic Fibonacci chain: absence of many-body localization at small interactions
Vipin Kerala Varma, Marko Znidaric
We study high-temperature magnetization transport in a many-body spin-1/2 chain with on-site quasiperiodic potential governed by the Fibonacci rule. In the absence of interactions…
Length scales in the many-body localized phase and their spectral signatures
Vipin Kerala Varma, Abhishek Raj, Sarang Gopalakrishnan +2
We compute and compare the decay lengths of several correlation functions and effective coupling constants in the many-body localized (MBL) phase. To this end, we consider the dist…
Anomalous and regular transport in spin 1/2 chains: AC conductivity
Ramsés J. Sánchez, Vipin Kerala Varma, Vadim Oganesyan
We study magnetization transport in anisotropic spin- chains governed by the integrable XXZ model with and without integrability-breaking perturbations at high temperatures ($…
Finite-size anomalies of the Drude weight: role of symmetries and ensembles
Ramsés J. Sánchez, Vipin Kerala Varma
We revisit the subtelties of computing the high temperature spin stiffness of the spin- XXZ chain using exact diagonalization to analyze its dependence on system symmetrie…
Entanglement and Majorana edge states in the Kitaev model
Saptarshi Mandal, Moitri Maiti, Vipin Kerala Varma
We investigate the von Neumann entanglement entropy and Schmidt gap in the ground state of the Kitaev model on the honeycomb lattice for square and cylindrical subsystems. We find…
Interaction-induced Drude weight enhancement in frustrated systems
Vipin Kerala Varma, Ramsés Sánchez
We investigate the effect of next nearest-neighbour hopping on the zero temperature Drude weight or superfluidity in mesoscopic one-dimensional systems of (a) single particle with…