6 papers
Two-state generator extraction: property currents and a two-layer arrow of time in pre- and post-selected quantum dynamics
Seiki Saito
Conditioning on both past and future assigns intermediate-time properties a causal observer does not; these time-symmetric assignments obey exact symmetry theorems and are measurab…
Deep Learning-Accelerated Dynamic Kinetic Monte Carlo Simulation for Hydrogen Transport in Tungsten
Seiki Saito, Keisuke Takeuchi, Hiroaki Nakamura +5
In magnetic confinement fusion reactors, hydrogen plasma irradiation causes material saturation and recycling, where hydrogen released from the tungsten wall significantly impacts…
Temporal Coarse-Graining as the Origin of Macroscopic Friction in Quantum Spin Chains via Data-Driven Liouvillian Extraction
Seiki Saito
Understanding how macroscopic irreversible hydrodynamics emerges from the reversible unitary dynamics of isolated quantum many-body systems remains a central challenge. Conventiona…
Development of a 3D-CNN-based Prediction Model for Migration Barriers in Plasma-Wall Interactions
Seiki Saito, Keisuke Takeuchi, Hiroaki Nakamura +5
Understanding the long-term transport of hydrogen isotopes in plasma-facing materials, such as tungsten, is critical for the steady-state operation of magnetic confinement fusion r…
Reactive Molecular Dynamics Simulation on DNA Double Strand Breaks Induced by Hydrogen Elimination
Hiroaki Nakamura, Kento Ishiguro, Ayako Nakata +3
We propose a scar model to reproduce how double-strand breaks occur in the telomeric DNA damaged by the effect of the -decay of tritium to helium. In this scar model, the two hy…
Molecular dynamics simulation for coalescence of vacancies in tungsten crystal
Sotaro Tsuru, Hiroaki Nakamura, Yuki Goto +3
We performed molecular dynamics simulations of coalescence of two vacancies in a tungsten (W) crystal to elucidate the effect of temperature and hydrogen atoms. Simulations were pe…