5 papers
Dynamical Quantum Phase Transitions in Boundary Time Crystals
Sukrut Mondkar, Priya Ghosh, Ujjwal Sen
We demonstrate the existence of a dynamical quantum phase transition (DQPT) in a dissipative collective-spin model that exhibits the boundary time crystal (BTC) phase. We initializ…
Role reversal in quantum Mpemba effect
Arunabha Das, Paranjoy Chaki, Priya Ghosh +1
We investigate the quantum Mpemba effect in a dissipative Dicke model, which consists of a spin-1/2 ensemble coupled to a bosonic mode, which in turn is coupled to a bosonic bath.…
Comparing physical quantities with finite-precision: beyond standard metrology and an illustration for cooling in quantum processes
Anindita Sarkar, Paranjoy Chaki, Priya Ghosh +1
We propose a general framework to compare the values of a physical quantity pertaining to two - or more - physical setups, in the finite-precision scenario. Such a situation requir…
Role of phase of optimal probe in noncommutativity vs coherence in quantum multiparameter estimation
Ritopriyo Pal, Priya Ghosh, Ahana Ghoshal +1
Quantum multiparameter estimation offers a framework for the simultaneous estimation of multiple parameters, pertaining to possibly noncommutating observables. While the optimal pr…
Fluctuation in energy extraction from quantum batteries: How open should the system be to control it?
Anindita Sarkar, Paranjoy Chaki, Priya Ghosh +1
We ask whether there exists a relation between controllability of the fluctuations in extractable energy of a quantum battery and (a) how open an arbitrary but fixed battery system…