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- The University of TokyoJP20 papers
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6 papers · 1 filter
Anomalous statistics in the Langevin equation with fluctuating diffusivity: from Brownian yet non-Gaussian diffusion to anomalous diffusion and ergodicity breaking
Takuma Akimoto, Jae-Hyung Jeon, Ralf Metzler +3
Diffusive motion is a fundamental transport mechanism in physical and biological systems, governing dynamics across a wide range of scales -- from molecular transport to animal for…
Tensor Renormalization Group Calculations of Partition-Function Ratios
Satoshi Morita, Naoki Kawashima
The behavior of dimensionless quantities defined as ratios of partition functions is analyzed to investigate phase transitions and critical phenomena. At criticality, the universal…
Improving the efficiency of quantum annealing with controlled diagonal catalysts
Tomohiro Hattori, Shu Tanaka
Quantum annealing is a promising algorithm for solving combinatorial optimization problems. It searches for the ground state of the Ising model, which corresponds to the optimal so…
Scaling Behaviors in Active Model B+ via the Functional Renormalization Group
Gergely FejÅs, Zsolt Szép, Naoki Yamamoto
We study the scaling behaviors of the active model B+ using the functional renormalization group (FRG) approach, based on the nonequilibrium effective action formulated via the Mar…
Structural Comparison of Error Mitigation Methods for Ising Machines: Penalty-Spin Model versus Stacked Model
Tetsuro Abe, Kanta Hino, Shu Tanaka
Error-mitigation methods for Ising machines are reexamined not merely as noise-suppression techniques but as a structural design problem of replica-coupled Ising models. Using simu…
Evaluating the Performance of Direct Higher-Order Formulations in Combinatorial Optimization Problems
Kazuki Ikeuchi, Yoshiki Matsuda, Shu Tanaka
Ising machines, including quantum annealing machines, are promising next-generation computers for combinatorial optimization problems. However, due to hardware limitations, most Is…