167 citations · 229 across the 10 of their papers we have counts for
10 papers
Indefinite Causal Order Reverses the Real-Complex Hierarchy
Jacopo Surace, Shintaro Minagawa, Ravi Kunjwal
[Note added after submission. After posting the first version of this preprint and corresponding with Ved Kunte and Kuntal Sengupta, we identified an issue with the claimed separat…
Robustness-based bounds for approximate joint realizations of incompatible quantum channels
Shintaro Minagawa, Ryo Takakura, Kensei Torii
Several quantum channels may fail to admit an exact joint realization, a property known as incompatibility. Channel incompatibility unifies various quantum limitations, such as mea…
All star-incompatible measurements can certify steering-based randomness
Shintaro Minagawa, Ravi Kunjwal
Certifying that quantum randomness generated by untrusted devices is unpredictable to an attacker (say, Eve) is crucial for device-independent security. Bipartite protocols where o…
Catalytic channels are the only noise-robust catalytic processes
Jeongrak Son, Ray Ganardi, Shintaro Minagawa +3
Catalysis refers to the possibility of enabling otherwise inaccessible quantum state transitions by supplying an auxiliary system, provided that the auxiliary is returned to its in…
Universal validity of the second law of information thermodynamics
Shintaro Minagawa, M. Hamed Mohammady, Kenta Sakai +2
Adiabatic measurements, followed by feedback and erasure protocols, have often been considered as a model to embody Maxwell's Demon paradox and to study the interplay between therm…
A complete and operational resource theory of measurement sharpness
Francesco Buscemi, Kodai Kobayashi, Shintaro Minagawa
We construct a resource theory of sharpness for finite-dimensional positive operator-valued measures (POVMs), where the sharpness-non-increasing operations are given by quantum pre…
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…
Unifying different notions of quantum incompatibility into a strict hierarchy of resource theories of communication
Francesco Buscemi, Kodai Kobayashi, Shintaro Minagawa +2
While there is general consensus on the definition of incompatible POVMs, moving up to the level of instruments one finds a much less clear situation, with mathematically different…
Von Neumann's information engine without the spectral theorem
Shintaro Minagawa, Hayato Arai, Francesco Buscemi
Von Neumann obtained the formula for the entropy of a quantum state by assuming the validity of the second law of thermodynamics in a thought experiment involving semipermeable mem…
Fundamental limits of quantum error mitigation
Ryuji Takagi, Suguru Endo, Shintaro Minagawa +1
The inevitable accumulation of errors in near-future quantum devices represents a key obstacle in delivering practical quantum advantages, motivating the development of various qua…