3 papers
quant-ph2025
Macroscopicity and observational deficit in states, operations, and correlations
Teruaki Nagasawa, Eyuri Wakakuwa, Kohtaro Kato +1
To understand the emergence of macroscopic irreversibility from microscopic reversible dynamics, the idea of coarse-graining plays a fundamental role. In this work, we develop a un…
quant-ph2025
Port-based telecloning of an unknown quantum state
Reiji Okada, Kohtaro Kato, Francesco Buscemi
Telecloning is a protocol introduced by Murao et al. [Phys. Rev. A 59, 156 (1999)] to distribute copies of an unknown quantum state to many receivers in a way that beats the trivia…
quant-ph2024
Quantum Bayes' rule and Petz transpose map from the minimum change principle
Ge Bai, Francesco Buscemi, Valerio Scarani
Bayes' rule, which is routinely used to update beliefs based on new evidence, can be derived from a principle of minimum change. This principle states that updated beliefs must be…