Tootfinder

Realizing Laser-driven Deuteron Acceleration with Low Energy Spread via In-situ D$_2$O-deposited Target
Tianyun Wei, Yasunobu Arikawa, Seyed Reza Mirfayzi, Yanjun Gu, Takehito Hayakawa, Alessio Morace, Kunioki Mima, Zechen Lan, Ryuya Yamada, Kohei Yamanoi, Koichi Honda, Sergei V. Bulanov, Akifumi Yogo
https://arxiv.org/abs/2404.…

Realizing Laser-driven Deuteron Acceleration with Low Energy Spread via In-situ D$_2$O-deposited Target
Generation of quasi-monoenergetic ion pulse by laser-driven acceleration is one of the hot topics in laser plasma physics. In this study, we present a new method for the \textit{In-situ} deposition of an ultra-thin D$_2$O layer on the surface of an aluminum foil target utilizing a spherical D$_2$O capsule. Employing a 10$^{19}$ W/cm$^2$ laser, we achieve the acceleration of 10.8 MeV deuterons with an energy spread of $Δ$E/E = 4.6% in the most favorable shot. The energy spread depends on the ex…

Birth of Rapidly Spinning, Overmassive Black Holes in the Early Universe
Kohei Inayoshi, Kohei Ichikawa
https://arxiv.org/abs/2402.14706 https://

Birth of Rapidly Spinning, Overmassive Black Holes in the Early Universe
The James Webb Space Telescope (JWST) has unveiled numerous massive black holes (BHs) in faint, broad-line active galactic nuclei (AGNs). The discovery highlights the presence of dust-reddened AGN populations, referred to as little red dots (LRDs), more abundant than X-ray selected AGNs, which are less influenced by obscuration. This finding indicates that the cosmic growth rate of BHs within this population does not decrease but rather increases at higher redshifts beyond $z\sim 6$. The BH acc…

Arithmetic properties of multiplier polynomials for certain polynomial maps
Yuya Murakami, Kaoru Sano, Kohei Takehira
https://arxiv.org/abs/2403.17315 http…

Arithmetic properties of multiplier polynomials for certain polynomial maps
We investigate the arithmetic properties of the multiplier polynomials for certain $1$-parameter families of polynomials. In particular, we answer the unsolved Excercise 4.12 (c) of the book ``The Arithmetic of Dynamical Systems" by J. H. Silverman for broader classes of polynomials than quadratic polynomials. As a corollary, we obtain the uniform upper bound of the naive height of parabolic parameters of unicritical polynomials. Moreover, candidates for the parabolic parameter are determined. …

Direct measure of DNA bending by quantum magnetic imaging of a nano-mechanical torque-balance
Zeeshawn Kazi, Isaac M. Shelby, Ruhee Nirodi, Joseph Turnbull, Hideyuki Watanabe, Kohei M. Itoh, Paul A. Wiggins, Kai-Mei C. Fu
https://arxiv.org/abs/2402.17964

Direct measure of DNA bending by quantum magnetic imaging of a nano-mechanical torque-balance
DNA flexibility is a key determinant of biological function, from nucleosome positioning to transcriptional regulation, motivating a direct measurement of the bend-torque response of individual DNA molecules. In this work, DNA bending is detected using a nano-mechanical torque balance formed by tethering a ferromagnetic nanoparticle probe by an individual DNA molecule to a diamond magnetic field imager. The torque exerted by the DNA in response to bending caused by an applied magnetic torque is…

Birth of Rapidly Spinning, Overmassive Black Holes in the Early Universe
Kohei Inayoshi, Kohei Ichikawa
https://arxiv.org/abs/2402.14706 https://

Birth of Rapidly Spinning, Overmassive Black Holes in the Early Universe
The James Webb Space Telescope (JWST) has unveiled numerous massive black holes (BHs) in faint, broad-line active galactic nuclei (AGNs). The discovery highlights the presence of dust-reddened AGN populations, referred to as little red dots (LRDs), more abundant than X-ray selected AGNs, which are less influenced by obscuration. This finding indicates that the cosmic growth rate of BHs within this population does not decrease but rather increases at higher redshifts beyond $z\sim 6$. The BH acc…

Negative Impact of Online Political Incivility on Willingness to See Political Comments
Kohei Nishi
https://arxiv.org/abs/2403.08372 https://

Negative Impact of Online Political Incivility on Willingness to See Political Comments
Recently, there has been significant attention on online political incivility. While previous research suggests that uncivil political comments lead people to be less willing to see more comments on the same issue, two critical questions have received limited exploration: (1) Are people exposed to uncivil political comments less willing to see other comments from the person who posted the uncivil comment?; (2) Are people exposed to uncivil political comments less willing to see comments from pe…

Non-equilibrium pathways to emergent polar supertextures
Vladimir A. Stoica, Tiannan Yang, Sujit Das, Yue Cao, Huaiyu Wang, Yuya Kubota, Cheng Dai, Hari Padmanabhan, Yusuke Sato, Anudeep Mangu, Quynh L. Nguyen, Zhan Zhang, Disha Talreja, Marc E. Zajac, Donald A. Walko, Anthony D. DiChiara, Shigeki Owada, Kohei Miyanishi, Kenji Tamasaku, Takahiro Sato, James M. Glownia, Vincent Esposito, Silke Nelson, Matthias C. Hoffmann, Richard D. Schaller, Aaron M. Lindenberg, Lane W. Martin, Ramamo…

Study of local conserved quantities in the one-dimensional Hubbard model
Kohei Fukai
https://arxiv.org/abs/2402.08924 https://arxiv.o…

Study of local conserved quantities in the one-dimensional Hubbard model
In this thesis, I study the local charges $\{Q_k\}$ in the one-dimensional Hubbard model, which is an integrable system used for theoretical studies of non-perturbative effects in strongly correlated electron systems. I obtained their explicit expressions in a closed form. An expression of the $k$-local charge $Q_k$ for $k > 5$, where $k$ denotes the support, had been unknown in previous studies. I find that $Q_k$ is a linear combination of a particular kind of products of the hopping terms. I …

Negative Impact of Online Political Incivility on Willingness to See Political Comments
Kohei Nishi
https://arxiv.org/abs/2403.08372 https://

Negative Impact of Online Political Incivility on Willingness to See Political Comments
Recently, there has been significant attention on online political incivility. While previous research suggests that uncivil political comments lead people to be less willing to see more comments on the same issue, two critical questions have received limited exploration: (1) Are people exposed to uncivil political comments less willing to see other comments from the person who posted the uncivil comment?; (2) Are people exposed to uncivil political comments less willing to see comments from pe…

Non-equilibrium pathways to emergent polar supertextures
Vladimir A. Stoica, Tiannan Yang, Sujit Das, Yue Cao, Huaiyu Wang, Yuya Kubota, Cheng Dai, Hari Padmanabhan, Yusuke Sato, Anudeep Mangu, Quynh L. Nguyen, Zhan Zhang, Disha Talreja, Marc E. Zajac, Donald A. Walko, Anthony D. DiChiara, Shigeki Owada, Kohei Miyanishi, Kenji Tamasaku, Takahiro Sato, James M. Glownia, Vincent Esposito, Silke Nelson, Matthias C. Hoffmann, Richard D. Schaller, Aaron M. Lindenberg, Lane W. Martin, Ramamo…