7 citations · 7 across the 9 of their papers we have counts for
9 papers
Non-equilibrium dynamics of the disordered Power of Two model
Kunal Singh, Sayan Choudhury
Motivated by recent experimental realizations of programmable spin models with long-range interactions, we investigate the non-equilibrium dynamics of the Power-of-Two (PWR2) model…
CFT Perspective On de-Sitter Cosmological Correlators
Sayantan Choudhury
We investigate the principles of quantum field theory using a stiff de Sitter space. We demonstrate that a non-unitary Lagrangian on a Euclidean AdS geometry can produce the pertur…
Dissipation stabilizes Dicke Time Quasicrystals
Sk Anisur, Shuva Mondal, Tanaya Ray +1
Quasi-periodic driving protocols provide a powerful route to realize novel non-equilibrium phases of matter beyond the Floquet paradigm. However, these protocols inevitably lead to…
Tunably realizing flat-bands and exceptional points in kinetically frustrated systems: An example on the non-Hermitian Creutz ladder
Debashish Dutta, Sayan Choudhury
We study a non-Hermitian extension of the Creutz ladder with generic non-reciprocal hopping. By mapping the ladder onto two decoupled non-Hermitian Su--Schrieffer--Heeger (SSH) cha…
Coexistence of inequivalent time-crystalline orders in a Floquet collective spin system
Shashank Mishra, Sayan Choudhury
We investigate the dynamical phases that emerge in collective spin models subjected to a spatially non-uniform periodic drive. Taking the paradigmatic Lipkin-Meshkov-Glick (LMG) mo…
Directional quantum walks of two bosons on the Hatano-Nelson lattice
Sk Anisur, Kartik Singh, Sayan Choudhury
We theoretically investigate the interplay of interactions and non-Hermiticity in the dynamics of two bosons on the one-dimensional Hatano-Nelson lattice with non-reciprocal tunnel…
Discrete Time Crystals in the spin-s Central Spin Model
Hillol Biswas, Sayan Choudhury
We propose periodic driving protocols to realize discrete time crystals (DTCs) in a spin-s central spin model. Interestingly, we identify parameter regimes, where eternal period-do…
The Floquet central spin model: A platform to realize eternal time crystals, entanglement steering, and multiparameter metrology
Hillol Biswas, Sayan Choudhury
We propose and characterize protocols to engineer exact quantum revivals, discrete time crystals (DTCs), and entanglement oscillations in the periodically driven central spin model…
Counterdiabatic Route to Entanglement Steering and Dynamical Freezing in the Floquet Lipkin-Meshkov-Glick Model
Nakshatra Gangopadhay, Sayan Choudhury
Controlling the dynamics of quantum many-body systems is crucial for developing quantum technologies. This work demonstrates that counter-diabatic (CD) driving provides a powerful…