4 papers
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…
Non-positive measurements aren't beneficial in quantum metrology for unitary encoding, but can be for open schemes
Paranjoy Chaki, Debarupa Saha, Kornikar Sen +1
We investigate whether non-positive operator-valued measurements can be beneficial for quantum metrology. For unitary encoding, we show that non-positive measurements offer no adva…
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…