Expertini Research Research

Browse Research Papers

1,348+ open-access research outputs.

โœ• Clear
๐Ÿ” radu iacob ๐Ÿ“‚ Physics
Showing 1348 results for "radu iacob" in Physics
Physics Preprint PDF DOI

First Detection of Faraday Rotation in a Gamma-Ray Burst Afterglow: Low Polarization and High Rotation Measure in GRB 260310A Reveal Jet Magnetic Structure and Environment

Collin T. Christy, Tanmoy Laskar, Kate D. Alexander, Noah Franz, Jonathan Granot, Ryan Chornock, Raffaella Margutti, Ramandeep Gill, Jeniveve Pearson, Edo Berger, Wen-fai Fong, Coleman Rohde, Patricia Schady ยท 2026

We report the detection of linear polarization in the radio afterglow of GRB 260310A, representing the first centimeter-wavelength polarization detection of a gamma-ray burst (GRB) afterglow and the fโ€ฆ

Read Paper โ†’
Physics Preprint PDF DOI

Orbital Data Centers: Spacecraft Constraints and Economic Viability

Slava G. Turyshev ยท 2026

Orbital data centers are being evaluated as solar-powered compute constellations and relay-integrated processing platforms. Their feasibility is not set by orbital solar flux alone, but by simultaneouโ€ฆ

Read Paper โ†’
Physics Preprint PDF DOI

The IACOB project: XVII. Nitrogen abundances in Galactic O-type stars: further hints for separating binary-interaction products from effectively single stars

C. Martinez-Sebastian, G. Holgado, S. Simon-Diaz, F. Martins, J. Puls ยท 2026

Context. Growing evidence is revealing the crucial role of binarity in massive star evolution. This affects evolution models and demands a refinement of the available observational constraints. Aims. โ€ฆ

Read Paper โ†’
Physics Preprint PDF DOI

Non-Monotonic Rotation Imprint on Time-Integrated Neutrino Spectral Moments in a 15\,$M_\odot$ Core-Collapse Supernova Sequence

Nicolas Viaux ยท 2026

We study the early post-bounce neutrino signal of the published Garching $15\,M_\odot$ rotating core-collapse supernova (CCSN) sequence consisting of non-rotating (NR), slowly rotating (SR, $\Omega_0=โ€ฆ

Read Paper โ†’
Physics Preprint PDF DOI

Quantum Kernel Advantage over Classical Collapse in Medical Foundation Model Embeddings

Sebastian Cajas Ordonez, Felipe Ocampo Osorio, Dax Enshan Koh, Rafi Al Attrach, Aldo Marzullo, Ariel Guerra-Adames, J. Alejandro Andrade, Siong Thye Goh, Chi-Yu Chen, Rahul Gorijavolu, Xue Yang, Noah Dane Hebdon, Leo Anthony Celi ยท 2026

We provide evidence of quantum kernel advantage under noiseless simulation in binary insurance classification on MIMIC-CXR chest radiographs using quantum support vector machines (QSVM) with frozen emโ€ฆ

Read Paper โ†’
Physics Preprint PDF DOI

Rotation-induced Relaxation of Supernova Constraints on Axionlike Particles

Tsurugi Takata, Kanji Mori, Ko Nakamura, Kei Kotake ยท 2026

We study how rotation modifies the constraints on MeV-scale axion-like particles (ALPs) coupled to photons derived from SN 1987A. We constrain the ALP parameter space based on both the energy-loss argโ€ฆ

Read Paper โ†’
Physics Preprint PDF DOI

Radio Monitoring Campaign of Active Repeater FRB 20220912A with CHIME

Thomas C. Abbott, Aaron B. Pearlman, Victoria M. Kaspi, Ayush Pandhi, Charanjot Brar, Alyssa Cassity, Amanda M. Cook, Alice P. Curtin, Emmanuel Fonseca, Bryan M. Gaensler, Deborah C. Good, Jason W. Hessels, Afrokk Khan, Calvin Leung, Robert A. Main, Ryan Mckinven, Bradley W. Meyers, Kenzie Nimmo, Mason Ng, Ziggy Pleunis, Paul Scholz, Vishwangi Shah, Kaitlyn Shin ยท 2026

FRB 20220912A is a highly active repeating fast radio burst (FRB) source, discovered by the Canadian Hydrogen Intensity Mapping Experiment (CHIME) using its real-time FRB detection system (CHIME/FRB).โ€ฆ

Read Paper โ†’
Physics Preprint PDF DOI

Detection and Evolution of Linear Polarization of the Galactic Center Transient MAXI J1744-294

Joseph M. Michail, Sebastiano D. von Fellenberg, Mayura Balakrishnan, Geoffrey C. Bower, Nicole M. Ford, Zach Sumners, Giovanni G. Fazio, Daryl Haggard, Joseph L. Hora, Garrett K. Keating, J. D. Livingston, Sera Markoff, Bart Ripperda, Sophia Sanchez-Maes, Howard A. Smith, S. P. Willner, Jun-Hui Zhao ยท 2026

MAXI J1744$-$294, likely a low-mass X-ray binary system, is a Galactic-center transient source, detected at radio and X-ray wavelengths, located approximately $19''$ southeast of Sgr A*. We report theโ€ฆ

Read Paper โ†’
Physics Preprint PDF DOI

Reliability of uGMRT Band-4 Polarimetry: Results from a Quadrature Hybrid Polarizer Bypass Experiment

Arpan Pal, Sanjeet Rai, Ganesh Kumbhar ยท 2026

Polarimetric observations at sub-GHz frequencies offer unique access to the magnetized universe through Faraday rotation and depolarization studies, but achieving reliable polarization calibration at โ€ฆ

Read Paper โ†’
Physics Preprint PDF DOI

Effects of Tungsten Radiative Cooling on Impurity, Heat and Momentum Transport in DIII-D Plasmas

A. Tema Biwole, T. Odstrcil, X. Litaudon, S. Shi, D. Ernst, C. F. B. Zimmermann, J. Lestz, N. T. Howard, P. Rodriguez-Fernandez, F. Khabanov, F. Turco, C. Perks, P. Manas, D. Fajardo, S. K. Kim, L. Schmitz, H. Wang, W. Boyes, S. Ding, B. Victor, C. Christal, C. Lasnier, T. M. Wilks, G. McKee ยท 2026

A first-of-its-kind experiment was conducted in the DIII-D tokamak under WEST similarity constraints on plasma shape and core parameters. This work presents a detailed transport study comparing a refeโ€ฆ

Read Paper โ†’
Physics Preprint PDF DOI

Black Hole Interior Operators and Dilatation Symmetry in Planar Black Branes

Nirmalya Kajuri ยท 2026

Planar AdS black branes have a scaling symmetry that maps a brane solution at one temperature to a solution at another. It is natural to expect that boundary representations of bulk field modes shouldโ€ฆ

Read Paper โ†’
Physics Preprint PDF DOI

Machine learning-based virtual diagnostics of dielectric laser acceleration

Thilo Egenolf, Oliver Boine-Frankenheim ยท 2026

We present the development of a digital twin-based reconstruction framework for dielectric laser acceleration (DLA) based on machine-learning-assisted inversion of single-shot electron energy spectra.โ€ฆ

Read Paper โ†’
Physics Preprint PDF DOI

Detectability and Systematic Bias from First-Order Phase-Transition Dephasing in Kerr EMRIs

Jingxu Wu, Liangyu Luo, Junyi Zhang, Jiyun Yang, Haoxiang Ma, Jie Shi ยท 2026

We study gravitational-wave dephasing induced by an effective first-order phase transition in a Kerr extreme mass-ratio inspiral (EMRI). The transition is modeled phenomenologically as a finite-width โ€ฆ

Read Paper โ†’
Physics Preprint PDF DOI

From Jets to Failed Supernovae: Morphologies and Gravitational-Wave Signatures in Two-Dimensional Magnetorotational Core-Collapse Supernovae

Kuo-Chuan Pan, Yi-Fang Li ยท 2026

Magnetized and rotating core-collapse supernovae (CCSNe) are promising candidates for producing long gamma-ray bursts and hypernovae. In this project, we present 34 two-dimensional magnetized core-colโ€ฆ

Read Paper โ†’
Physics Preprint PDF DOI

FAST Polarization Catalog of FRB 20240114A

Tian-Cong Wang, Jun-Shuo Zhang, Xiao-Hui Liu, Wei-Yang Wang, Pei Wang, He Gao, Di Li, Bing Zhang, Wei-Wei Zhu, Jin-Lin Han, Ke-Jia Lee, Ye Li, Dengke Zhou, Wan-Jin Lu, Jintao Xie, Jianhua Fang, Jin-Huang Cao, Chen-Chen Miao, Yu-Hao Zhu, Yunchuan Chen, Si-Lu Xu, Huaxi Chen, Xiao-Feng Cheng, Qin Wu, Shuo Cao, Long-Xuan Zhang, Shi-Yan Tian, Yong-Kun Zhang, Yi Feng, De-Jiang Zhou, Jia-Rui Niu, Heng Xu, Xuelei Chen, Yuan-Pei Yang, Dong-Zi Li, Fa-Yin Wang, Chao-Wei Tsai, Wen-Fei Yu, Chen-Hui Niu, Jia-Wei Luo, Rui Luo, E. Gugercinoglu, Zi-Wei Wu, Chun-Feng Zhang, Xiang-Lei Chen, Shuai Feng, Xiang-Han Cui, Qing-Yue Qu, Yuan-Hong Qu, Bo-Jun Wang, Yi-Dan Wang, Lin Lin, Ai-Yuan Yang, Yuan-Chuan Zou, Yu-Xiang Huang, Wei-Cong Jing, Jian Li, Yong-Feng Huang, Su-Ming Weng, Shi-Han Yew, Xue-Feng Wu, Lei Zhang, Ru-Shuang Zhao ยท 2026

Polarization measurements of fast radio bursts (FRBs) probe the magnetized plasma surrounding their central engines. FRB~20240114A is an exceptionally active repeating source, with 17,356 bursts detecโ€ฆ

Read Paper โ†’
Physics Preprint PDF DOI

Quantum orientation entanglement analysis of the interpolating helicity states between the instant form dynamics and the light-front dynamics

Deepasika Dayananda, Chueng-Ryong Ji ยท 2026

The interplay between quantum orientation entanglement and Wigner rotation plays a fundamental role in understanding the behavior of spin angular momentum in quantum states. To analyze the quantum oriโ€ฆ

Read Paper โ†’
Physics Preprint PDF DOI

Discovery of a millisecond pulsar with a CO white dwarf companion

Jie Zhang, Zerui Wang, Lei Zhang, Yulan Liu, Alessandro Ridolfi, Meng Guo, Di Li, Ryan S. Lynch, Cong Wang, Pei Wang, Mengmeng Ni, Jiale Hu, Mengquan Liu, Zhie Liu, Bo Han, Chenchen Miao ยท 2026

We report the discovery and characterization of PSR J1810-0623, a fully recycled millisecond pulsar with a spin period of 4.55 ms, discovered with the Five-hundred-meter Aperture Spherical radio Telesโ€ฆ

Read Paper โ†’
Physics Preprint PDF DOI

Three-dimensional Global Relativistic Radiation Magnetohydrodynamics of Magnetically Arrested Disk Accretion Flows in AGNs

Ramiz Aktar, Kuo-Chuan Pan, Toru Okuda ยท 2026

We perform three-dimensional radiation-relativistic magnetohydrodynamic (3D Rad-RMHD) simulations of accretion flows around spinning active galactic nuclei (AGNs). Our study focuses on the magneticallโ€ฆ

Read Paper โ†’
Physics Preprint PDF DOI

Dual Cutler-Vallisneri Corrections: Mitigating PSD Drift in Zero-Latency Gravitational-Wave Searches

James Kennington ยท 2026

Maximizing pre-merger warning times in gravitational-wave searches requires minimizing algorithmic latency. While current pipelines typically rely on truncated linear-phase filters, minimum-phase whitโ€ฆ

Read Paper โ†’
Physics Preprint PDF DOI

A Stable, High-Order Time-Stepping Scheme for the Drift-Diffusion Model in Modern Solar Cell Simulation

Jun Du, Jun Yan ยท 2026

This paper presents a one-dimensional transient drift--diffusion simulator for advanced solar cells, integrating a structure-preserving finite-volume spatial discretization with Scharfetter--Gummel--tโ€ฆ

Read Paper โ†’
Page 1 of 68 Next โ†’