59 citations · 98 across the 29 of their papers we have counts for
29 papers
Conserved relativistic Ertel's current generating the vortical and thermodynamic aspects of spacetime
Hirofumi Sakuma, Izumi Ojima, Hayato Saigo +1
Motivated by Aoki et al.'s recent research on conserved charges and entropy current, we investigated the conservation of relativistic Ertel's current, which has received little att…
Category theory as a foundation for soft robotics
Hayato Saigo, Makoto Naruse, Kazuya Okamura +2
Soft robotics is an emerging field of research where the robot body is composed of compliant and soft materials. It allows the body to bend, twist, and deform to move or to adapt i…
Local reservoir model for choice-based learning
Makoto Naruse, Eiji Yamamoto, Takashi Nakao +6
Decision making based on behavioral and neural observations of living systems has been extensively studied in brain science, psychology, and other disciplines. Decision-making mech…
Photon localization revisited
Izumi Ojima, Hayato Saigo
In the light of Newton-Wigner-Wightman theorem of localizability question, we have proposed before a typical generation mechanism of effective mass for photons to be localized in t…
Local state and sector theory in local quantum physics
Izumi Ojima, Kazuya Okamura, Hayato Saigo
We define a new concept of local states in the framework of algebraic quantum field theory (AQFT). Local states are a natural generalization of states and give a clear vision of lo…
Notes on the Krupa-Zawisza Ultrapower of Self-Adjoint Operators
Hiroshi Ando, Izumi Ojima, Hayato Saigo
It is known that there is a difficulty in constructing the ultrapower of unbounded operators. Krupa and Zawisza gave a rigorous definition of the ultrapower A^{omega} of a selfadjo…