4 papers · 1 filter
Metrological quantum-to-classical crossover in the volume of a noisy quasiperiodic lattice
Priya Ghosh, Debarupa Saha, Ujjwal Sen +1
Localization-delocalization transitions have recently been proposed for building a class of efficient quantum many-body critical sensors. This work scrutinizes metrological perform…
Resourcefulness vs indivisibility in quantum channels
Priya Ghosh, Soumyajit Pal, Ujjwal Sen
Open quantum dynamics can be categorized in several ways, including according to their divisibility. For any quantum channel acting for any finite time period, we propose measures…
Designing a Universal Quantum Switch for Arbitrary Quantum Dynamics
Priya Ghosh, Kornikar Sen, Ujjwal Sen
A quantum switch is a superoperator that, in general, creates a superposition of various causal orders of two or more quantum dynamics that are all divisible in the complete positi…
Detecting quantum properties in physical systems using proxy witnesses
Priya Ghosh, Ujjwal Sen, Siddhartha Das
In practice, it is quite challenging to detect a quantum property, a microscopic property, in a macroscopic system. In our work, we construct general proxy witnesses of quantum pro…