287 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- The University of TokyoJP65 papers
- Kyoto UniversityJP56 papers
- National Astronomical Observatory of JapanJP28 papers
- Japan Science and Technology AgencyJP16 papers
- Tohoku UniversityJP16 papers
- Kyushu UniversityJP13 papers
- Institute of Space and Astronautical ScienceJP12 papers
- Nagoya UniversityJP11 papers
- Centre National de la Recherche ScientifiqueFR8 papers
- Pennsylvania State UniversityUS8 papers
- The University of OsakaJP7 papers
- University of California, BerkeleyUS7 papers
9 papers · 1 filter
Localization and limit laws of a three-state alternate quantum walk on a two-dimensional lattice
Takuya Machida, C. M. Chandrashekar
A two-dimensional discrete-time quantum walk (DTQW) can be realized by alternating a two-state DTQW in one spatial dimension followed by an evolution in the other dimension. This w…
Sparse approximation based on a random overcomplete basis
Yoshinori Nakanishi-Ohno, Tomoyuki Obuchi, Masato Okada +1
We discuss a strategy of sparse approximation that is based on the use of an overcomplete basis, and evaluate its performance when a random matrix is used as this basis. A small co…
A genuinely stable Lagrange-Galerkin scheme for convection-diffusion problems
Masahisa Tabata, Shinya Uchiumi
We present a Lagrange-Galerkin scheme free from numerical quadrature for convection-diffusion problems. Since the scheme can be implemented exactly as it is, theoretical stability…
Probing the nature of the TeV gamma-ray binary HESS J0632+057 by monitoring Be disk variability
Yuki Moritani, Atsuo T. Okazaki, Alex C. Carciofi +9
We report on monitoring observations of the TeV gamma-ray binary HESS J0632+057, which were carried out to constrain the interaction between the Be circumstellar disk and the compa…
Holonomic gradient method for distribution function of a weighted sum of noncentral chi-square random variables
Tamio Koyama, Akimichi Takemura
We apply the holonomic gradient method to compute the distribution function of a weighted sum of independent noncentral chi-square random variables. It is the distribution function…
A limit law of the return probability for a quantum walk on a hexagonal lattice
Takuya Machida
A return probability of random walks is one of the interesting subjects. As it is well known, the return probability strongly depends on the structure of the space where the random…
Collective motion of oscillatory walkers
Takahiro Ezaki, Ryosuke Nishi, Daichi Yanagisawa +1
We study a system of interacting self-propelled particles whose walking velocity depends on the stage of the locomotion cycle. The model introduces a phase equation in the optimal…
Dynamics of assembly production flow
Takahiro Ezaki, Daichi Yanagisawa, Katsuhiro Nishinari
Despite recent developments in management theory, maintaining a manufacturing schedule remains difficult because of production delays and fluctuations in demand and supply of mater…
Taming macroscopic jamming in transportation networks
Takahiro Ezaki, Ryosuke Nishi, Katsuhiro Nishinari
In transportation networks, a spontaneous jamming transition is often observed, e.g in urban road networks and airport networks. Because of this instability, flow distribution is s…