168 citations · 396 across the 20 of their papers we have counts for
20 papers
Emergent Nonperturbative Universal Floquet Localization
Soumadip Pakrashi, Atanu Rajak, Sambuddha Sanyal
We show that a robust, nonperturbative localization plateau emerges in periodically driven quasiperiodic lattices, independent of the static localization properties and drive proto…
Higher-order discrete time crystals and enhanced sensing in a quantum kicked top
Subhashis Das, Vishal Khan, Atanu Rajak
We characterize various dynamical phases of the simplest version of the quantum kicked top model, a paradigmatic system for studying quantum chaos, which exhibits both regular and…
Global Blind Spot in Understanding Trigonometric Derivatives: A Multinational Analysis
Yossi Ben-Zion, Jianqiang Liu, Chun-Ming Wang +2
Trigonometric derivatives are fundamental in both mathematics and physics, yet their proper application, particularly the distinction between radians and degrees, poses a significa…
Statistical prethermalization in randomly kicked many-body classical rotor system
Aritra Kundu, Tanay Nag, Atanu Rajak
We explore the phenomena of prethermalization in a many-body classical system of rotors under aperiodic drives characterised by waiting time distribution (WTD), where the waiting t…
Quantum Annealing: An Overview
Atanu Rajak, Sei Suzuki, Amit Dutta +1
In this review, after providing the basic physical concept behind quantum annealing (or adiabatic quantum computation), we present an overview of some recent theoretical as well as…
From prethermalization to chaos in periodically driven coupled rotors
Yonathan Sadia, Emanuele G. Dalla Torre, Atanu Rajak
Periodically driven (Floquet) systems are said to prethermalize when their energy absorption is very slow for long time. This effect was first discovered in quantum spin models, wh…
Dynamics of fluctuation correlation in periodically driven classical system
Aritra Kundu, Atanu Rajak, Tanay Nag
Having established the fact that interacting classical kicked rotor systems exhibit long-lived prethermal phase with quasi-conserved average Hamiltonian before entering into chaoti…
Stability, Isolated Chaos, and Superdiffusion in Nonequilibrium Many-Body Interacting Systems
Atanu Rajak, Itzhack Dana
We demonstrate that stability and chaotic-transport features of paradigmatic nonequilibrium many-body systems, i.e., periodically kicked and interacting particles, can deviate sign…
Periodic and aperiodic dynamics of flat bands in diamond-octagon lattice
Tanay Nag, Atanu Rajak
We drive periodically a two-dimensional diamond-octagon lattice model by switching between two Hamiltonian corresponding two different magnetic flux piercing through diamond plaque…
Characterizations of prethermal states in periodically driven many-body systems with unbounded chaotic diffusion
Atanu Rajak, Itzhack Dana, Emanuele G. Dalla Torre
We introduce well-defined characterizations of prethermal states in realistic periodically driven many-body systems with unbounded chaotic diffusion of the kinetic energy. These sy…
Stability and pre-thermalization in chains of classical kicked rotors
Atanu Rajak, Roberta Citro, Emanuele G. Dalla Torre
Periodic drives are a common tool to control physical systems, but have a limited applicability because time-dependent drives generically lead to heating. How to prevent the heatin…
Entanglement entropy of a three-spin interacting spin chain with a time-reversal breaking impurity at one boundary
Tanay Nag, Atanu Rajak
We investigate the effect of a time-reversal breaking impurity term on both the equilibrium and non-equilibrium critical properties of entanglement entropy (EE) in a three-spin int…
Complete characterization of spin chains with two Ising symmetries
Bat-el Friedman, Atanu Rajak, Emanuele G. Dalla Torre
Spin chains with two Ising symmetries are the Jordan-Wigner duals of one-dimensional interacting fermions with particle-hole and time-reversal symmetry. From earlier works on Major…
Survival probability in a quenched Majorana chain with an impurity
Atanu Rajak, Tanay Nag
We investigate the dynamics of a one-dimensional -wave superconductor with next-nearest-neighbor hopping and superconducting interaction derived from a three-spin interacting Is…
Effect of double local quenches on Loschmidt echo and entanglement entropy of a one-dimensional quantum system
Atanu Rajak, Uma Divakaran
We study the effect of two simultaneous local quenches on the evolution of Loschmidt echo and entanglement entropy of a one dimensional transverse Ising model. In this work, one of…
Classical-quantum crossover in the critical behavior of the transverse field S-K spin glass model
Sudip Mukherjee, Atanu Rajak, Bikas K Chakrabarti
We study the critical behavior of Sherrington-Kirkpatrick model in transverse field (at finite temperature) using Monte Carlo simulation and exact diagonalization (at zero temperat…
Possibility of adiabatic transport of a Majorana edge state through an extended gapless region
Atanu Rajak, Tanay Nag, Amit Dutta
In the context of slow quenching dynamics of a -wave superconducting chain, it has been shown that a Majorana edge state can not be adiabatically transported from one topologica…
Quantum Annealing search of Ising spin glass ground state(s) with tunable transverse & longitudinal fields
A Rajak, B K Chakrabarti
Here we first discuss briefly the quantum annealing technique. We then study the quantum annealing of Sherrington-Kirkpatrick spin glass model with the tuning of both transverse an…
Survival probability of an edge Majorana in a 1-D p-wave superconducting chain under sudden quenching of parameters
Atanu Rajak, Amit Dutta
We consider the temporal evolution of a zero energy edge Majorana of a spinless -wave superconducting chain following a sudden change of a parameter of the Hamiltonian. Starting…
Fidelity susceptibility and Loschmidt echo for generic paths in a three spin interacting transverse Ising model
Atanu Rajak, Uma Divakaran
We study the effect of presence of different types of critical points such as ordinary critical point, multicritical point and quasicritical point along different paths on the Fide…