61 citations · 270 across the 14 of their papers we have counts for
14 papers
Controlled Zeno-Induced Localization of Free Fermions in a Quasiperiodic Chain
Pinaki Singha, Nilanjan Roy, Marcin Szyniszewski +1
We investigate measurement-induced localization in a continuously monitored one-dimensional Aubry--André--Harper model, focusing on the quantum Zeno regime in which the measurement…
Unconventional quantum criticality in a non-Hermitian extended Kitaev chain
S Rahul, Nilanjan Roy, Ranjith R Kumar +2
We investigate the nature of quantum criticality and topological phase transitions near the critical lines obtained for the extended Kitaev chain with next nearest neighbor hopping…
Family-Vicsek dynamical scaling and Kardar-Parisi-Zhang-like superdiffusive growth of surface roughness in a driven one-dimensional quasiperiodic model
Sreemayee Aditya, Nilanjan Roy
The investigation of the dynamical universality classes of quantum systems is an important, and rather less explored, aspect of non-equilibrium physics. In this work, considering t…
Interplay of many-body interactions and quasiperiodic disorder in the all-band-flat diamond chain
Aamna Ahmed, Nilanjan Roy, Auditya Sharma
We study the effects of quasiperiodic Aubry-André (AA) disorder and interactions on a one-dimensional all-band-flat (ABF) diamond chain. We consider the application of disorder in…
Diagnostics of nonergodic extended states and many body localization proximity effect through real-space and Fock-space excitations
Nilanjan Roy, Jagannath Sutradhar, Sumilan Banerjee
We provide real-space and Fock-space (FS) characterizations of ergodic, nonergodic extended (NEE) and many-body localized (MBL) phases in an interacting quasiperiodic system, namel…
Signatures of topological phase transition on a quantum critical line
Ranjith R Kumar, Nilanjan Roy, Y R Kartik +2
Recently topological states of matter have witnessed a new physical phenomenon where both edge modes and gapless bulk coexist at topological quantum criticality. The presence and a…
Entanglement entropy and out-of-time-order correlator in the long-range Aubry-André-Harper model
Nilanjan Roy, Auditya Sharma
We investigate the nonequilbrium dynamics of entanglement entropy and out-of-time-order correlator (OTOC) of noninteracting fermions at half-filling starting from a product state t…
Dynamics of spectral correlations in the entanglement Hamiltonian of the Aubry-André-Harper model
Aamna Ahmed, Nilanjan Roy, Auditya Sharma
We numerically study the evolution of spectral correlations in the entanglement Hamiltonian (EH) of non-interacting fermions in the Aubry-André-Harper (AAH) model. We analyze the t…
Fraction of delocalized eigenstates in the long-range Aubry-André-Harper model
Nilanjan Roy, Auditya Sharma
We uncover a systematic structure in the single particle phase-diagram of the quasiperiodic Aubry-André-Harper(AAH) model with power-law hoppings () when the qu…
Interplay of disorder and interactions in a flat-band supporting diamond chain
Nilanjan Roy, Ajith Ramachandran, Auditya Sharma
We systematically study the effect of disorder and interactions on a quasi-one dimensional diamond chain possessing flat bands. Disorder localizes all the single particle eigenstat…
Study of counterintuitive transport properties in the Aubry-André-Harper model via entanglement entropy and persistent current
Nilanjan Roy, Auditya Sharma
The single particle eigenstates of the Aubry-André-Harper model are known to show a delocalization-localization transition at a finite strength of the quasi-periodic disorder. In t…
Quantum simulation of long range quantum spin glass with strong area-law violation using trapped ions
Nilanjan Roy, Auditya Sharma, Rick Mukherjee
Ground states of local Hamiltonians are known to obey the entanglement entropy area law. While area law violation of a mild kind (logarithmic) is commonly encountered, strong area-…
Entanglement contour perspective for strong area law violation in a disordered long-range hopping model
Nilanjan Roy, Auditya Sharma
We numerically investigate the link between the delocalization-localization transition and entanglement in a disordered long-range hopping model of spinless fermions by studying va…
A finite temperature study of ideal quantum gases in the presence of one dimensional quasi-periodic potential
Nilanjan Roy, S. Sinha
We study the thermodynamics of ideal Bose gas as well as the transport properties of non interacting bosons and fermions in a one dimensional quasi-periodic potential, namely Aubry…