Tootfinder

Attosecond-resolved probing of recolliding electron wave packets in liquids and aqueous solutions
Angana Mondal, Nicolas Tancogne-Dejean, George Trenins, Sona Achotian, Meng Han, Tadas Balciunas, Zhong Yin, Angel Rubio, Mariana Rossi, Ofer Neufeld, Hans Jakob W\"orner
https://arxiv.org/abs/2509.12872

Attosecond-resolved probing of recolliding electron wave packets in liquids and aqueous solutions
High-harmonic spectroscopy (HHS) in liquids promises real-time access to ultrafast electronic dynamics in the native environment of chemical and biological processes. While electron recollision has been established as the dominant mechanism of high-harmonic generation (HHG) in liquids, resolving the underlying electron dynamics has remained elusive. Here we demonstrate attosecond-resolved measurements of recolliding electron wave packets, extending HHS from neat liquids to aqueous solutions. Us…

Expanding detection bandwidth via a photonic reservoir for ultrafast optical sensing
Yuito Ito, Tomoaki Niiyama, Tetsuya Asai, Gouhei Tanaka, Atsushi Uchida, Satoshi Sunada
https://arxiv.org/abs/2510.10404

Expanding detection bandwidth via a photonic reservoir for ultrafast optical sensing
The detection of ultrafast optical and radio-frequency (RF) signals is crucial for applications ranging from high-speed communications to advanced sensing. However, conventional detectors are fundamentally constrained by their intrinsic bandwidth, limiting accurate broadband signal measurement. Here, we show that a neuromorphic photonic processing approach can overcome this limitation, enabling accurate broadband signal detection beyond the detector bandwidth. The key idea lies in the spatiotem…

Comparing XRISM cluster velocity dispersions with predictions from cosmological simulations: are feedback models too ejective?
XRISM Collaboration, Marc Audard, Hisamitsu Awaki, Ralf Ballhausen, Aya Bamba, Ehud Behar, Rozenn Boissay-Malaquin, Laura Brenneman, Gregory V. Brown, Lia Corrales, Elisa Costantini, Renata Cumbee, Maria Diaz Trigo, Chris Done, Tadayasu Dotani, Ken Ebisawa, Megan E. Eckart, Dominique Eckert, Satoshi Eguchi, Teruaki Enoto, Yuichiro Ezoe, Adam Foster, Ryuichi Fuj…

Comparing XRISM cluster velocity dispersions with predictions from cosmological simulations: are feedback models too ejective?
The dynamics of the intra-cluster medium (ICM), the hot plasma that fills galaxy clusters, are shaped by gravity-driven cluster mergers and feedback from supermassive black holes (SMBH) in the cluster cores. XRISM measurements of ICM velocities in several clusters offer insights into these processes. We compare XRISM measurements for nine galaxy clusters (Virgo, Perseus, Centaurus, Hydra A, PKS\,0745--19, A2029, Coma, A2319, Ophiuchus) with predictions from three state-of-the-art cosmological s…

Topological Hall Effect in PrSb$_2$
Shingo Araki, Hinata Izumida, Kazuto Akiba, Tatsuo C. Kobayashi, Takashi Kambe
https://arxiv.org/abs/2510.06570 https://

Topological Hall Effect in PrSb$_2$
PrSb$_2$ exhibits a charge-density wave (CDW) transition at $T_\mathrm{CDW} = 100$ K and antiferromagnetic (AFM) ordering at $T_\mathrm{N} = 5$ K at ambient pressure. Hall resistivity measurements revealed an anomalous feature within the AFM state, which was attributed to the topological Hall effect (THE), ruling out contributions from the ordinary and anomalous Hall effects. Significantly, the THE anomaly diminished with increasing pressure and almost vanished as the CDW transition was suppres…

Quantitative imaging of 478-keV prompt gamma rays from boron neutron capture reactions
Tetsuya Mizumoto, Shotaro Komura, Atsushi Takada, Yoshinori Sakurai, Toru Tanimori
https://arxiv.org/abs/2509.00435

Quantitative imaging of 478-keV prompt gamma rays from boron neutron capture reactions
The accurate imaging and quantitative measurement of 478-keV prompt gamma rays are critical for advancing boron neutron capture therapy (BNCT), a promising cancer treatment. Although numerical simulations have indicated that such measurements are feasible, their practical application has proven challenging. This study introduces a gamma-ray imaging detector designed specifically for precise BNCT measurements. Using boron-rich phantom samples, we successfully imaged 478-keV gamma rays and establ…

Long-Term Variability in Physiological-Arousal Relationships for Robust Emotion Estimation
Hiroto Sakimura, Takayuki Nagaya, Tomoki Nishi, Tetsuo Kurahashi, Katsunori Kohda, Nobuhiko Muramoto
https://arxiv.org/abs/2508.18782

Long-Term Variability in Physiological-Arousal Relationships for Robust Emotion Estimation
Estimating emotional states from physiological signals is a central topic in affective computing and psychophysiology. While many emotion estimation systems implicitly assume a stable relationship between physiological features and subjective affect, this assumption has rarely been tested over long timeframes. This study investigates whether such relationships remain consistent across several months within individuals. We developed a custom measurement system and constructed a longitudinal data…

Full-field rheo-optical analysis of wormlike and networked micellar structures under uniaxial extensional flow
Masakazu Muto, Naoki Kako, Tatsuya Yoshino, Shinji Tamano
https://arxiv.org/abs/2507.15562

Full-field rheo-optical analysis of wormlike and networked micellar structures under uniaxial extensional flow
The present study proposes a novel full-field extensional rheo-optical technique to investigate the relationship between the rheological properties and internal structural deformation of complex fluids under uniaxial extensional flow. Macroscopic viscoelasticity from rheological measurements and microscopic birefringence from optical measurements are integrated to evaluate the microstructural deformation and orientation of the fluids under extensional stress. The proposed technique integrates a…

Optically detected magnetic resonance of nitrogen-vacancy centers in microdiamonds inside nanopolycrystalline diamond anvil cell
Masahiro Ohkuma, Keigo Arai, Kenji Ohta, Toru Shinmei, Ryo Matsumoto, Yoshihiko Takano, Tetsuo Irifune
https://arxiv.org/abs/2507.13634

Optically detected magnetic resonance of nitrogen-vacancy centers in microdiamonds inside nanopolycrystalline diamond anvil cell
We demonstrated optically detected magnetic resonance (ODMR) of nitrogen-vacancy (NV) centers in microdiamonds inside a diamond anvil cell pressurized with nanopolycrystalline diamond (NPD) anvils. NPD exhibits high optical transparency, superior hardness, and low thermal conductivity, making it suitable for optical and spectroscopic measurements under high-pressure and high-temperature conditions. We observed the ODMR signal from an ensemble of NV centers under high pressures, reaching up to 2…

Magneto-cubic and magneto-linear dependence observed in an in-plane anomalous Hall magnet
Ayano Nakamura, Shinichi Nishihaya, Mitsuru Akaki, Motoi Kimata, Kenta Sudo, Yuki Deguchi, Hsiang Lee, Tadashi Yoneda, Masaki Kondo, Hiroaki Ishizuka, Masashi Tokunaga, Masaki Uchida
https://arxiv.org/abs/2507.21458

Magneto-cubic and magneto-linear dependence observed in an in-plane anomalous Hall magnet
The Hall effect, particularly that arising from in-plane magnetic field, has recently emerged as a sensitive probe of quantum geometric properties in solids. Especially in trigonal systems, in-plane anomalous Hall effect (AHE) can be explicitly induced by nontrivial off-diagonal coupling between the magnetic field and the Hall vector on the principal plane. Here we elucidate multipolar dependence of the off-diagonal coupling in the in-plane AHE, by systematically measuring on the (001) principa…