6 papers
Encoding parameters by measurement: Forgetting can be better in quantum metrology
Shuva Mondal, Priya Ghosh, Ujjwal Sen
We introduce quantum parameter estimation with the encoding being via a quantum measurement. We quantify the precision for estimating parameters characterizing a general two-outcom…
Infinite reduction in absorbing time in quantum walks over classical ones
Shuva Mondal, Amrita Mandal, Ujjwal Sen
We study the absorption time and spreading rate of the discrete-time quantum walk propagating on a line in the presence or absence of an absorber. We analytically establish that in…
Dissipation stabilizes Dicke Time Quasicrystals
Sk Anisur, Sayan Choudhury, Shuva Mondal +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…
Optimal quantum precision in noise estimation: Is entanglement necessary?
Shuva Mondal, Priya Ghosh, Ujjwal Sen
We ask whether the optimal probe is entangled, and if so, what is its character and amount, for estimating the noise parameter of a large class of local quantum encoding processes…
Isocoherent Work Extraction from Quantum Batteries: Basis-Dependent Response
Shuva Mondal, Debarupa Saha, Ujjwal Sen
We identify a connection between quantum coherence and the maximum extractable work from a quantum battery, and to this end, we define the coherence-constrained maximal work (CCMW)…
Entanglement marker for lifetime of time crystal in transmon-modulated open Dicke model
Tanaya Ray, Shuva Mondal, Ujjwal Sen
We investigate the discrete time crystal (DTC) phase in a qubit ensemble, periodically driven by its interaction with either a photon or a transmon field, which is prone to dissipa…