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- Kyoto UniversityJP32 papers
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8 papers · 1 filter
Finite-temperature phase diagram of two-component bosons in a cubic optical lattice: Three-dimensional t-J model of hard-core bosons
Y. Nakano, T. Ishima, N. Kobayashi +3
We study the three-dimensional bosonic t-J model, i.e., the t-J model of "bosonic electrons", at finite temperatures. This model describes the Heisenberg spin model…
The Gathering Problem for Two Oblivious Robots with Unreliable Compasses
Taisuke Izumi, Samia Souissi, Yoshiaki Katayama +4
Anonymous mobile robots are often classified into synchronous, semi-synchronous and asynchronous robots when discussing the pattern formation problem. For semi-synchronous robots,…
On the Approximability and Hardness of Minimum Topic Connected Overlay and Its Special Instances
Jun Hosoda, Juraj Hromkovic, Taisuke Izumi +3
In the context of designing a scalable overlay network to support decentralized topic-based pub/sub communication, the Minimum Topic-Connected Overlay problem (Min-TCO in short) ha…
Lattice Ginzburg-Landau Model of a Ferromagnetic p-wave Pairing Phase in Superconducting Materials and an Inhomogeneous Coexisting State
Akihiro Shimizu, Hidetoshi Ozawa, Ikuo Ichinose +1
We study the interplay of the ferromagnetic (FM) state and the p-wave superconducting (SC) state observed in several materials such as UCoGe and URhGe in a totally nonperturbative…
Emergent velocity agreement in robot networks
Davide Canepa, Xavier Défago, Taisuke Izumi +1
In this paper we propose and prove correct a new self-stabilizing velocity agreement (flocking) algorithm for oblivious and asynchronous robot networks. Our algorithm allows a floc…
Suboptimal Solution Path Algorithm for Support Vector Machine
Masayuki Karasuyama, Ichiro Takeuchi
We consider a suboptimal solution path algorithm for the Support Vector Machine. The solution path algorithm is an effective tool for solving a sequence of a parametrized optimizat…