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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…
Dynamical Characterization of Quantum Coherence
Hai Wang, Ujjwal Sen
Quantum coherence, rooted in the superposition principle of quantum mechanics, is a crucial quantum resource. Various measures, operational interpretations, and generalizations of…