6 papers · 1 filter
Entanglement Generation Beyond Quantum Theory: From Product States to Popescu-Rohrlich Boxes
Shun Umekawa, Akihiro Hokkyo, Hayato Arai +1
Entanglement generation is a fundamental dynamical capability in quantum information science and underpins many quantum advantages. While quantum theory enables it through unitary…
Intersubjectivity as a principle determining physical observables and non-classicality
Shun Umekawa, Koki Ono, Hayato Arai
We identify an operational principle that singles out Projection-Valued Measures (PVMs) among general Positive Operator-Valued Measures (POVMs), bridging the modern quantum measure…
Hypothesis testing and Stein's lemma in general probability theories with Euclidean Jordan algebra and its quantum realization
Kanta Sonoda, Hayato Arai, Masahito Hayashi
Even though quantum information theory gives advantage over classical information theory, these two information theories have a structural similarity that many exponet rates of inf…
Quantum Implementation of Non-Positive-Operator-Valued Measurements in General Probabilistic Theories by Post-Selected POVMs
Hayato Arai, Masahito Hayashi
It is important problem to clarify the class of implementable quantum measurements from both fundamental and applicable viewpoints. Positive-Operator-Valued Measure (POVM) measurem…
One-shot and asymptotic classical capacity in general physical theories
Shintaro Minagawa, Hayato Arai
With the recent development of quantum information theory, some attempts exist to construct information theory beyond quantum theory. Here we consider hypothesis testing relative e…
Derivation of Standard Quantum Theory via State Discrimination
Hayato Arai, Masahito Hayashi
It is a key issue to characterize the model of standard quantum theory out of general models by an operational condition. The framework of General Probabilistic Theories (GPTs) is…