17 citations · 28 across the 9 of their papers we have counts for
11 papers
Time-reversal-based quantum metrology in a central-spin architecture: from SATIN to butterfly echo
Aditya Kumar, Sayan Choudhury
We investigate quantum-enhanced time-reversal-based metrology using the central spin model, in which a single ancilla spin of magnitude mediates interactions between…
Topological chirality of dissipative limit cycles in an open Dicke model
Nikolay Yegovtsev, Sayan Choudhury, W. Vincent Liu
In an open, -symmetric Dicke model with chiral atom-cavity couplings, we show that dissipation drives two limit-cycle phases of opposite chirality in the thermodynamic limit,…
Robust continuous symmetry breaking and multiversality in the chiral Dicke model
Nikolay Yegovtsev, Sayan Choudhury, W. Vincent Liu
The Dicke model (DM) serves as a paradigm for understanding collective light-matter interactions. We introduce the chiral Dicke model, a generalization where an atomic ensemble cou…
Quantum quenches in a spin-1 chain with tunable symmetry
Luis Eduardo Ramos-Solís, Sayan Choudhury, Freddy Jackson Poveda-Cuevas +1
In recent years, the dynamics of interacting quantum systems far from equilibrium have attracted significant research interest. Driven by rapid progress in quantum simulators, vari…
Topological energy pumping in a quasi-periodically driven four-level system
Vansh Kaushik, Sayan Choudhury, Tanay Nag
We investigate a quasi-periodically driven four-level system that serves as a temporal analog of topological phenomena found in four-band models with intertwined spin and orbital d…
Heating suppression via two-rate random and quasiperiodic drive protocols
Krishanu Ghosh, Sayan Choudhury, Diptiman Sen +1
We study a random and quasiperiodically driven one-dimensional non-integrable PXP spin chain in a magnetic field for two distinct drive protocols. Each of these protocols involves…
Proposal for many-body quantum chaos detection with single-site measurements
Isaías Vallejo-Fabila, Adway Kumar Das, Sayan Choudhury +1
We demonstrate that the long-time dynamics of an observable associated with a single lattice site is sufficient to determine whether a many-body quantum system exhibits level stati…
Many-body Physics of Ultracold Alkaline-Earth atoms with SU()-symmetric interactions
Eduardo Ibarra-García-Padilla, Sayan Choudhury
Symmetries play a crucial role in understanding phases of matter and the transitions between them. Theoretical investigations of quantum models with SU() symmetry have provided…
Prethermalization in the PXP Model under Continuous Quasiperiodic Driving
Pinaki Dutta, Sayan Choudhury, Vishwanath Shukla
Motivated by recent experiments realizing long-lived non-equilibrium states in aperiodically driven quantum many-body systems, we investigate the dynamics of a quasiperiodically dr…
Exact Floquet flat band and heating suppression via two-rate drive protocols
Tista Banerjee, Sayan Choudhury, K. Sengupta
We demonstrate the existence of exact Floquet flat bands implying strong violation of the eigenstate thermalization hypothesis in a large class of closed quantum many-body systems…
Prethermalization in aperiodically driven classical spin systems
Sajag Kumar, Sayan Choudhury
Periodically driven classical many-body systems can host a rich zoo of prethermal dynamical phases. In this work, we extend the paradigm of classical prethermalization to aperiodic…