Enhancement in the performance of a quantum battery by ordered and disordered interactions

S Ghosh, T Chanda, A Sen - Physical Review A, 2020 - APS
Considering the ground state of a quantum spin model as the initial state of the quantum
battery, we show that both ordered and disordered interaction strengths play a crucial role in …

Dynamic-disorder-induced enhancement of entanglement in photonic quantum walks

QQ Wang, XY Xu, WW Pan, K Sun, JS Xu, G Chen… - Optica, 2018 - opg.optica.org
Entanglement generation in discrete-time quantum walks is deemed to be another key
property beyond the transport behaviors. The latter has been widely used in investigating …

Disordered Kitaev chain with long-range pairing: Loschmidt echo revivals and dynamical phase transitions

U Mishra, R Jafari, A Akbari - Journal of Physics A: Mathematical …, 2020 - iopscience.iop.org
We explore the dynamics of long-range Kitaev chain by varying pairing interaction exponent.
It is well known that the distinctive features of the nonequilibrium dynamics of a closed …

Stark localization near Aubry-André criticality

A Sahoo, A Saha, D Rakshit - Physical Review B, 2025 - APS
In this work, we investigate the Stark localization near the Aubry-André (AA) critical point. We
perform careful studies for reporting system-dependent parameters, such as localization …

Scale-invariant freezing of entanglement

T Chanda, T Das, D Sadhukhan, AK Pal, A Sen, U Sen - Physical Review A, 2018 - APS
We show that bipartite entanglement in an one-dimensional quantum spin model
undergoing time evolution due to local Markovian environments can be frozen over time. We …

Production of genuine multimode entanglement in circular waveguides with long-range coupling

T Anuradha, A Patra, R Gupta, A Rai, A Sen - Physical Review A, 2024 - APS
Starting with a product initial state, squeezed (squeezed coherent) state in one of the modes,
and vacuum in the rest, we report that a circular waveguide comprising modes coupled with …

Spontaneous magnetization of quantum XY spin model in joint presence of quenched and annealed disorder

A Bera, D Rakshit, A Sen, U Sen - Physical Review B, 2017 - APS
We investigate equilibrium statistical properties of the isotropic quantum XY spin-1/2 model
in an external magnetic field when the interaction and field parts are subjected to quenched …

Localization with non-Hermitian off-diagonal disorder

A Saha, D Rakshit - arxiv preprint arxiv:2310.13744, 2023 - arxiv.org
In this work, we discuss a non-Hermitian system described via a one-dimensional single-
particle tight-binding model, where the non-Hermiticity is governed by random nearest …

Non-Markovianity vs athermality: perturbation-enhanced information backflow

A Sarkar, D Saha, U Sen - arxiv preprint arxiv:2502.05010, 2025 - arxiv.org
Non-Markovianity and athermality are useful resources in quantum technologies, and it is
therefore important to understand the relations between the two, for general quantum …

Effect of long-range interactions on multipartite entanglement in Heisenberg chains

SS Roy, HS Dhar - Physical Review A, 2019 - APS
It is well known that the notions of spatial locality are often lost in quantum systems with long-
range interactions, as exhibited by the emergence of phases with exotic long-range order …