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Shun Umekawa

4 papers hereh-index 18 citations5 works total

Matching runs newest-first, so older work may not be attached to this profile yet.

author position
  • first author3
  • middle author1

Across the 4 of 4 papers where every author was matched, so the position is known.

fields
  • quant-ph4

identity via Semantic Scholar / OpenAlex

collaborators

4 papers

quant-ph2026

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…

quant-ph2026

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…

quant-ph2026

Information Thermodynamics in Generalized Probabilistic Theories

Koki Ono, Shun Umekawa, Hiroyasu Tajima

Generalized probabilistic theories (GPTs) provide a unified framework for describing probabilistic physical theories, encompassing classical and quantum theories as well as hypothe…

quant-ph2026

On the operational and algebraic quantum correlations

Shun Umekawa, Jaeha Lee

We investigate the intrinsic ambiguity in the definition of correlation functions arising from the inevitable invasiveness of quantum measurements. While algebraic correlations def…

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