2025-05-12 10:38 |
[PUBDB-2025-01596]
Journal Article
Chen, Y. ; Xue, X. ; Cardoso, V.
Black holes as fermion factories
[DESY-23-109; arXiv:2308.00741]
Ultralight bosons near rotating black holes can undergo significant growth through superradiant energy extraction, potentially reaching field values close to the Planck scale and transforming black holes into effective transducers for these fields. The interaction between boson fields and fermions may lead to parametric production or Schwinger pair production of fermions, with efficiencies significantly exceeding those of perturbative decay processes. [...]
OpenAccess: PDF PDF (PDFA);
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2025-05-09 14:21 |
[PUBDB-2025-01590]
Book/Dissertation / PhD Thesis
Trebushinin, A. ; Serkez, S. ; Geloni, G. ; et al
Statistical optics methods for generating, simulating, and characterising emission from relativistic electron beams
[DESY-THESIS-2025-008]
Hamburg : Verlag Deutsches Elektronen-Synchrotron DESY, DESY-THESIS 172 pp. (2024) [10.3204/PUBDB-2025-01590]2024 = Dissertation, Universität Hamburg, 2025
Synchrotron radiation sources and free-electron lasers have revolutionised the study of matter and biological systems by providing unique combinations of radiation pulse characteristics. Although these two types of facilities differ fundamentally in terms of pulses time scales, coherence properties, and (peak) brilliance, each offers an exceptional mix of these features. [...]
OpenAccess: _PhD_Thesis___final__сopy_PDF-A - PDF PDF (PDFA); desy-thesis-25-008.title - PDF PDF (PDFA);
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2025-05-09 12:05 |
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2025-05-09 12:00 |
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2025-05-09 10:51 |
[PUBDB-2025-01581]
Talk (non-conference)
Schweighofer, B.
openCost „Cost Data Survey“ - Results
The aim of the project openCost is to create a technical infrastructure that makes publication costs freely accessible and exchangeable via standardized interfaces and formats. This is supposed to enable cost transparency on an institutional, national, and international level.To achieve this, we are developing a standardized metadata schema to record, retrieve and map all publication costs of a scientific institution in a structured form. [...]
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2025-05-07 10:18 |
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2025-05-06 13:46 |
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2025-05-05 16:39 |
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2025-05-05 12:07 |
[PUBDB-2025-01527]
Journal Article
ISLAM, M. ; Adhikari, S. K. ; Adhikari, S. ; et al
Charge conduction and relaxation in Ca$_{1−x}$Dy$_x$BaFe$_4$O$_7$
The paper presents in-depth studies of the dielectric properties and conduction dynamics of Dy-doped CaBaFe$_4$O$_7$ which is a recently characterized magnetoelectric material with strong potentials for technological applications as it shows a near-room-temperature ferrimagnetic transition along with strong ferrimagnetic moment, and gigantic electric polarization change. This work demonstrates the direct correlation of the dielectric and electrical transport properties of Ca$_{1−𝑥}$Dy$_𝑥$BaFe$_4$O$_7$ (𝑥=0, 0.01, 0.03, and 0.05) with structural distortion through various dc, ac conduction, high-energy x-ray diffraction studies, and modeling of the data [...]
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2025-05-05 11:20 |
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