Tootfinder

Hubble constant constraint using 117 FRBs with a more accurate probability density function for ${\rm DM}_{\rm diff}$
Jiaming Zhuge, Marios Kalomenopoulos, Bing Zhang
https://arxiv.org/abs/2508.05161

Hubble constant constraint using 117 FRBs with a more accurate probability density function for ${\rm DM}_{\rm diff}$
Fast radio bursts (FRBs) are among the most mysterious astronomical transients. Due to their short durations and cosmological distances, their dispersion measure (DM) - redshift ($z$) relation is useful for constraining cosmological parameters and detecting the baryons in the Universe. The increasing number of localized FRBs in recent years has provided more precise constraints on these parameters. In this project, we collect 117 of the latest, localized FRBs, discuss the effect of a more accur…

Replaced article(s) found for physics.chem-ph. https://arxiv.org/list/physics.chem-ph/new
[1/1]:
- Efficient Implementation of Gaussian Process Regression Accelerated Saddle Point Searches with Ap...
Rohit Goswami, Maxim Masterov, Satish Kamath, Alejandro Pe\~na…

A Neural Network Approach to Multi-radionuclide TDCR Beta Spectroscopy
Li Yi, Qian Yang
https://arxiv.org/abs/2509.03137 https://arxiv.org/pdf/2509.03137…

A Neural Network Approach to Multi-radionuclide TDCR Beta Spectroscopy
Liquid scintillation triple-to-doubly coincident ratio (TDCR) spectroscopy is widely adopted as a standard method for radionuclide quantification because of its inherent advantages such as high precision, self-calibrating capability, and independence from radioactive reference sources. However, multiradionuclide analysis via TDCR faces the challenges of limited automation and reliance on mixture-specific standards, which may not be easily available. Here, we present an Artificial Intelligence (…

FRB 20250316A - A Brilliant and Nearby One-off #FastRadioBurst Localized to 13 pc Precision: https://iopscience.iop.org/article/10.3847/2041-8213/adf62f -> Physical properties provided by Keck Observatory data reveals surprising FRB environment / Origin of Mysterious Radio Signal Possibly Discovered: https://keckobservatory.org/rbfloat/ / https://www.cfa.harvard.edu/news/origin-mysterious-radio-signal-possibly-discovered

Design and Experimental Validation of UAV Swarm-Based Phased Arrays with MagSafe- and LEGO-Inspired RF Connectors
Bidya Debnath, Mst Mostary Begum, Prashant Neupant, Brooke E. Molen, Junming Diao
https://arxiv.org/abs/2507.22295

Design and Experimental Validation of UAV Swarm-Based Phased Arrays with MagSafe- and LEGO-Inspired RF Connectors
This paper presents a novel UAV swarm-based phased array antenna system that leverages MagSafe- and LEGO-inspired radio frequency (RF) connectors to address key challenges in distributed phased arrays, including inter-element oscillator synchronization, localization, phase coherence, and positional accuracy. The proposed non-threaded, hands-free connectors enable precise inter-element spacing and establish a continuous, low-loss RF signal propagation path during mid-flight docking. A multi-stag…

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A narrowband burst from FRB 20190520B simultaneously observed by FAST and Parkes
Yuhao Zhu, Chenhui Niu, Shi Dai, Di Li, Pei Wang, Yi Feng, Jingwen Wu, Yongkun Zhang, Xianghan Cui, Junshuo Zhang, Jinhuang Cao
https://arxiv.org/abs/2507.17696

A narrowband burst from FRB 20190520B simultaneously observed by FAST and Parkes
Fast Radio Bursts (FRBs) are short-duration radio transients with mysterious origins. Since its uncertainty, there are very few FRBs that are observed by different instruments, simultaneously. This study presents a detailed analysis of a burst from FRB 20190520B observed by FAST and Parkes at the same time. The spectrum of this individual burst ended at the upper limit of the FAST frequency band and was simultaneously detected by the Parkes telescope in the 1.5-1.8 GHz range. By employing spect…

Theory of universal Planckian metal in t-J model: application for high-Tc cuprate superconductors
Yung-Yeh Chang, Khoe Van Nguyen, Kimberly Remund, Chung-Hou Chung
https://arxiv.org/abs/2506.15552

Theory of universal Planckian metal in t-J model: application for high-Tc cuprate superconductors
The mysterious quantum-critical Planckian bad metal phase with perfect T-linear resistivity persisting beyond the quasi-particle limit and universal T-linear scattering rate has been observed in various high-Tc cuprate superconductors. Here, we develop a realistic theoretical approach to this phase in an analytically solvable large-N multi-channel Kondo lattice model, derived from a heavy-fermion formulated conventionaL t-J model, known for qualitatively describing cuprates. This phase is origi…

Few-MHz bandwidth tunable optical filter based on a fiber-ring resonator
Gabriele Maron, Anton B\"olian, Xin-Xin Hu, Luke Masters, Arno Rauschenbeutel, J\"urgen Volz
https://arxiv.org/abs/2506.11953

Few-MHz bandwidth tunable optical filter based on a fiber-ring resonator
We present a fiber-ring resonator that realizes an ultra-narrowband, high-extinction, low-loss, tunable optical filter. It consists of a pair of commercial variable ratio directional couplers that allow precise adjustment of the filter bandwidth and its on-resonance transmission. This design also grants access to multiple modes of operation, such as a simultaneous band-stop and band-pass filter. Our characterization reveals a bandwidth of less than 2 MHz, together with an extinction exceeding 2…