Publications by authors named "Y Sumino"
We calculate the two-loop heavy quarkonium Hamiltonian within potential-nonrelativistic-QCD effective field theory in the nonannihilation channel. This calculation represents the first nontrivial step toward determining the N^{4}LO Hamiltonian in the weak coupling regime. The large amount of computation is systematically handled by employing the β expansion, differential equations for master integrals, and adopting a single-step matching procedure, in contrast to the conventional two-step approach.
View Article and Find Full Text PDFMixing of two fluids can lead to the formation of a precipitate. If one of the fluids is injected into a confined space filled with the other, then a created precipitate disrupts the flow locally and forms complex spatiotemporal patterns. The relevance of controlling these patterns has been highlighted in the engineering and geological contexts.
View Article and Find Full Text PDFArticle Synopsis
- Under non-equilibrium conditions, liquid droplets can dynamically interact with their environment, creating systems that exhibit self-organizing functions similar to living organisms.
- The study highlights the importance of pairing and eruptive behaviors in cells for collective activity and function maintenance, but these have been difficult to replicate in artificial systems.
- The researchers developed a droplet system using hydrophobic oils on water, which can autonomously form moving structures and display cyclic behaviors, mimicking complex cellular dynamics through the interaction of their interfacial properties.
Article Synopsis
- Cells use a process called water/water phase separation (w/wPS) to form droplets containing crowded biopolymers, which help organize biological components and their reactions.
- Researchers discovered that these droplets can trap kinesins and microtubules, creating a vortex flow that enhances mechanical activity within the droplet.
- The study demonstrates that w/wPS not only aids in chemical interactions but also plays a crucial role in mechanical movement by effectively organizing protein motors.