112 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Kobe UniversityJP9 papers
- Korea Institute for Advanced StudyKR7 papers
- Hokkaido UniversityJP5 papers
- Nara Women's UniversityJP3 papers
- National Institute of Technology, Tomakomai CollegeJP3 papers
- The University of TokyoJP3 papers
- Japan Science and Technology AgencyJP2 papers
- Kumamoto Health Science UniversityJP2 papers
- RIKENJP2 papers
- RIKEN Center for Brain ScienceJP2 papers
- Ritsumeikan UniversityJP2 papers
- Ruđer Bošković InstituteHR2 papers
28 papers
Decidability of Quantum Modal Logic
Kenji Tokuo
The decidability of a logical system refers to the existence of an algorithm that can determine whether any given formula in that system is a theorem. In this paper, Harrop's lemma…
Quantum modal logic
Kenji Tokuo
A modal logic based on quantum logic is formalized in its simplest possible form. Specifically, a relational semantics and a sequent calculus are provided, and the soundness and th…
Facial Expression Recognition System Using DNN Accelerator with Multi-threading on FPGA
Takuto Ando, Yusuke Inoue
In this paper, we implement a stand-alone facial expression recognition system on an SoC FPGA with multi-threading using a Deep learning Processor Unit (DPU). The system consists o…
Peculiarity of Symmetric Ring Systems with Double Y-Junctions and the magnetic effects
Yukihiro Fujimoto, Kohkichi Konno, Tomoaki Nagasawa
We discuss quantum dynamics in the ring systems with double Y-junctions in which two arms have same length. The node of a Y-junction can be parametrized by U(3). Considering mathem…
Dynamical generation of quark/lepton mass hierarchy in an extra dimension
Yukihiro Fujimoto, Kouhei Hasegawa, Kenji Nishiwaki +4
We show that the observed quark/lepton mass hierarchy can be realized dynamically on an interval extra dimension with point interactions. In our model, the positions of the point i…
5d Dirac fermion on quantum graph
Yukihiro Fujimoto, Tomonori Inoue, Makoto Sakamoto +2
In this paper, we investigate a five-dimensional Dirac fermion on a quantum graph that consists of a single vertex and loops. We find that the model possesses a rich structure…
Correspondence between Phase Oscillator Network and Classical XY Model with the same random and frustrated interactions
Tomoyuki Kimoto, Tatsuya Uezu
We study correspondence between a phase oscillator network with distributed natural frequencies and a classical XY model at finite temperatures with the same random and frustrated…
Extended supersymmetry with central charges in higher dimensional Dirac action
Yukihiro Fujimoto, Kouhei Hasegawa, Kenji Nishiwaki +3
A new realization of extended quantum-mechanical supersymmetry (QM SUSY) with central extension is investigated. We first show that two different sets of () supercharges…
Quantum Reflection and Transmission in Ring Systems with Double Y-Junctions: Occurrence of Perfect Reflection
Yukihiro Fujimoto, Kohkichi Konno, Tomoaki Nagasawa +1
We consider the scattering problems of a quantum particle in a system with a single Y-junction and in ring systems with double Y-junctions. We provide new formalism for such quantu…
Duality of (2,3,5)-distributions and Lagrangian cone structures
Goo Ishikawa, Yumiko Kitagawa, Asahi Tsuchida +1
As was shown by a part of the authors, for a given -distribution on a -dimensional manifold , there is, locally, a Lagrangian cone structure on another …
Extended supersymmetry in Dirac action with extra dimensions
Yukihiro Fujimoto, Kouhei Hasegawa, Kenji Nishiwaki +3
We investigate a new realization of extended quantum-mechanical supersymmetry. We first show that an quantum-mechanical supersymmetry is hidden in the four-dimensio…
Dynamical generation of fermion mass hierarchy in an extra dimension
Yukihiro Fujimoto, Takashi Miura, Kenji Nishiwaki +1
We propose a new mechanism to produce a fermion mass hierarchy dynamically in a model with a singlet generation of fermions. A five dimensional gauge theory on an interval with poi…
Supersymmetry in 6d Dirac Action
Yukihiro Fujimoto, Kouhei Hasegawa, Kenji Nishiwaki +2
We investigate a 6d Dirac fermion on a rectangle. It is found that the 4d spectrum is governed by supersymmetric quantum mechanics. Then we demonstrate that the supersymmetry…
6d Dirac fermion on a rectangle; scrutinizing boundary conditions, mode functions and spectrum
Yukihiro Fujimoto, Kouhei Hasegawa, Kenji Nishiwaki +2
We classify possible boundary conditions of a 6d Dirac fermion on a rectangle under the requirement that the 4d Lorentz structure is maintained, and derive the profiles and spe…
Comprehensive Analysis of Yukawa Hierarchies on with Magnetic Fluxes
Yukihiro Fujimoto, Tatsuo Kobayashi, Kenji Nishiwaki +2
Based on the result of classification in our previous work, we exhaustively investigate Yukawa sector of model on magnetized orbifolds , , $T^{2}/Z…
Active Dirac Neutrinos via Doublets in 5d
Yukihiro Fujimoto, K. Hasegawa, Tomoaki Nagasawa +3
We propose a new mechanism to generate minuscule active neutrino masses in a five-dimensional~(5d) spacetime of an interval without introducing singlet neutrinos. Under a…
Correspondence between phase oscillator network and classical XY model with the same infinite-range interaction in statics
T. Uezu, T. Kimoto, S. Kiyokawa +1
We study the phase oscillator networks with distributed natural frequencies and classical XY models both of which have a class of infinite-range interactions in common. We find tha…
Duality on geodesics of Cartan distributions and sub-Riemannian pseudo-product structures
G. Ishikawa, Y. Kitagawa, W. Yukuno
Given a five dimensional space endowed with a Cartan distribution, the abnormal geodesics form another five dimensional space with a cone structure. Then it is shown, if the cone s…
Duality of singular paths for (2,3,5)-distributions
Goo Ishikawa, Yumiko Kitagawa, Wataru Yukuno
We show a duality which arises from distributions of Cartan type, having growth (2, 3, 5), from the view point of geometric control theory. In fact we consider the space of singula…
Solvable model of a phase oscillator network on a circle with infinite-range Mexican-hat-type interaction
Tatsuya Uezu, Tomoyuki Kimoto, Masato Okada
We describe a solvable model of a phase oscillator network on a circle with infinite-range Mexican-hat-type interaction. We derive self-consistent equations of the order parameters…
An Optimal Odd Unimodular Lattice in Dimension 72
Masaaki Harada, Tsuyoshi Miezaki
It is shown that if there is an extremal even unimodular lattice in dimension 72, then there is an optimal odd unimodular lattice in that dimension. Hence, the first example of an…
An elementary approach to toy models for D. H. Lehmer's conjecture
Eiichi Bannai, Tsuyoshi Miezaki, Vladimir A. Yudin
In 1947, Lehmer conjectured that the Ramanujan's tau function never vanishes for all positive integers , where is the -th Fourier coefficient of the cusp form $…
Logic of Simultaneity
Kenji Tokuo
A logical model of spatiotemporal structures is pictured as a succession of processes in time. One usual way to formalize time structure is to assume the global existence of time p…
Synapse efficiency diverges due to synaptic pruning following over-growth
Kazushi Mimura, Tomoyuki Kimoto, Masato Okada
In the development of the brain, it is known that synapses are pruned following over-growth. This pruning following over-growth seems to be a universal phenomenon that occurs in al…