55 citations · 294 across the 25 of their papers we have counts for
4 papers · 1 filter
Separability criterion using one observable for special states: Entanglement detection via quantum quench
Roopayan Ghosh, Sougato Bose
Detecting entanglement in many-body quantum systems is crucial but challenging, typically requiring multiple measurements. Here, we establish the class of states where measuring co…
Tuning the phase diagram of a Rosenzweig-Porter model with fractal disorder
Madhumita Sarkar, Roopayan Ghosh, Ivan M. Khaymovich
Rosenzweig-Porter (RP) model has garnered much attention in the last decade, as it is a simple analytically tractable model showing both ergodic--nonergodic extended and Anderson l…
Boundary Chaos: Exact Entanglement Dynamics
Felix Fritzsch, Roopayan Ghosh, Tomaž Prosen
We compute the dynamics of entanglement in the minimal setup producing ergodic and mixing quantum many-body dynamics, which we previously dubbed {\em boundary chaos}. This consists…
Relaxation of imbalance in a disordered XX model with on-site dephasing
Roopayan Ghosh, Marko Žnidarič
The relaxation of observables to their non-equilibrium steady states in a disordered XX chain subjected to dephasing at every site has been intensely studied in recent years. We co…