4 papers
Quantifying Measurement Objectivity: A Retrodictive Approach
Jiaxi Kuang, Teruaki Nagasawa, Kensei Torii +1
When can one interpret the outcomes of a quantum measurement as revealing a pre-existing objective property? Using the recently developed formalism of quantum measurement retrodict…
Joint Realizability Tradeoffs Bounded by Quantum Channel Incompatibility
Shintaro Minagawa, Ryo Takakura, Kensei Torii
Incompatible quantum channels cannot be jointly and exactly realized, meaning that any approximate joint realization inevitably entails a tradeoff in implementation accuracy. While…
Comparing quantum incompatibility of device sets from an operational perspective
Kensei Torii, Ryo Takakura, Ryotaro Imamura
To effectively utilize quantum incompatibility as a resource in quantum information processing, it is crucial to evaluate how incompatible a set of devices is. In this study, we pr…
Quantum measurement retrodiction and entropic uncertainty relations
Jiaxi Kuang, Kensei Torii, Francesco Buscemi
We study quantum measurement retrodiction using the principle of minimum change. For quantum-to-classical measurement channels, we show that all standard quantum divergences select…