7 papers
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…
Autoequivalences and stability conditions on a degenerate K3 surface
Hayato Arai
We study autoequivalences and stability conditions on the derived category of coherent sheaves on a singular surface which arises as an open subvariety of a type III Kulikov de…
Half-spherical twists on derived categories of coherent sheaves
Hayato Arai
For a flat morphism between smooth quasi-projective varieties and its fiber , we prove that spherical objects on pushed-forward from ind…
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…