Tootfinder

'tis the season for the Flaming Star nebula.
Photons collected and massaged a few years ago.
🔭🧪 #astrophotography

Contextuality-based quantum key distribution with deterministic single-photon sources
Yu Meng, Debashis Saha, Mikkel Thorbj{\o}rn Mikkelsen, Clara Henke, Ying Wang, Nikolai Bart, Arne Ludwig, Ad\'an Cabello, Leonardo Midolo
https://arxiv.org/abs/2510.12761

Contextuality-based quantum key distribution with deterministic single-photon sources
Photons are central to quantum technologies, with photonic qubits offering a promising platform for quantum communication. Semiconductor quantum dots stand out for their ability to generate single photons on demand, a key capability for enabling long-distance quantum networks. In this work, we utilize high-purity single-photon sources based on self-assembled InAs(Ga)As quantum dots as quantum information carriers. We demonstrate that such on-demand single photons can generate quantum contextual…

Causal Bounds on EFTs with anomalies with a Pseudoscalar, Photons, and Gravitons
Ziyu Dong, Jaehoon Jeong, Alex Pomarol
https://arxiv.org/abs/2510.12138 https://

Causal Bounds on EFTs with anomalies with a Pseudoscalar, Photons, and Gravitons
Theories with pseudoscalars that couple through anomalies (such as axion models) are of particular phenomenological interest. We carry out a comprehensive analysis of all bounds obtainable from bootstrapping the amplitudes when a pseudoscalar couples to photons and gravitons. This allows us to find new cutoff scales of theories with anomalies that are more restrictive than those obtained from naive perturbative analysis. Our results are especially relevant for holographic models, as the bounds …

Dispersion-Aware Modeling Framework for Parallel Optical Computing
Ziqi Wei, Yuanjian Wan, Yuhu Cheng, Xiao Yu, Peng Xie
https://arxiv.org/abs/2511.18897 https://arxiv.org/pdf/2511.18897 https://arxiv.org/html/2511.18897
arXiv:2511.18897v1 Announce Type: new
Abstract: Optical computing represents a groundbreaking technology that leverages the unique properties of photons, with innate parallelism standing as its most compelling advantage. Parallel optical computing like cascaded Mach-Zehnder interferometers (MZIs) based offers powerful computational capabilities but also introduces new challenges, particularly concerning dispersion due to the introduction of new frequencies. In this work, we extend existing theories of cascaded MZI systems to develop a generalized model tailored for wavelength-multiplexed parallel optical computing. Our comprehensive model incorporates component dispersion characteristics into a wavelength-dependent transfer matrix framework and is experimentally validated. We propose a computationally efficient compensation strategy that reduces global dispersion error within a 40 nm range from 0.22 to 0.039 using edge-spectrum calibration. This work establishes a fundamental framework for dispersion-aware model and error correction in MZI-based parallel optical computing chips, advancing the reliability of multi-wavelength photonic processors.
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Emission of pairs of Minkowski photons through the lens of the Unruh effect
Juan V. O. P\^egas, Robert Bingham, Gianluca Gregori, George E. A. Matsas
https://arxiv.org/abs/2510.01477

Emission of pairs of Minkowski photons through the lens of the Unruh effect
We discuss the emission of pairs of photons by charges with generic worldlines in the Minkowski vacuum from the viewpoint of inertial observers and interpret them from the perspective of Rindler observers. We show that the emission of pairs of Minkowski photons corresponds, in general, to three distinct processes according to Rindler observers: scattering, and emission and absorption of pairs of Rindler photons. In the special case of uniformly accelerated charges, the radiation observed in the…

High-energy photons from Gamma-Ray Bursts, but no neutrinos
A. De R\'ujula (Instituto de F\'isica Te\'orica)
https://arxiv.org/abs/2510.12634 https://

High-energy photons from Gamma-Ray Bursts, but no neutrinos
The Cannon-Ball model of Gamma-Ray Bursts and their afterglows--described in the text and in innumerable previous occasions--is extremely successful and predictive. In a few intrinsically bright GRBs, gamma-rays with energies in the TeV range have been observed. The CB model, I argue, has no difficulty in describing the origin and approximate properties of these high-energy gamma rays and the extreme difficulty of observing their accompanying neutrinos.

Optimised spectral purity of unfiltered photons via pump and nonlinearity shaping
Tommaso Faleo, Christopher L. Morrison, Rom\'eo Beignon, Francesco Graffitti, Vikas Remesh, Stefan Frick, Alessandro Fedrizzi, Gregor Weihs, Robert Keil
https://arxiv.org/abs/2510.06196

Optimised spectral purity of unfiltered photons via pump and nonlinearity shaping
Photonic quantum technologies rely on the efficient generation and interference of indistinguishable photons. Exceptional achievements in this respect have been obtained by domain engineering of quasi-phase-matched parametric down-conversion sources, demonstrating high two-photon interference visibility using only moderate bandpass spectral filtering. Here, we optimised the spectral purity and indistinguishability of photons from telecom-wavelength sources by combining Gaussian quasi-phase-matc…

Amplification and Detection of Single Itinerant Microwave Photons
Lukas Danner (German Aerospace Center, Institute for Complex Quantum Systems and IQST, University of Ulm, Ulm, Germany), Max Hofheinz (Institut Quantique, Universit\'e de Sherbrooke, Sherbrooke, Qu\'ebec, Canada), Nicolas Bourlet (Institut Quantique, Universit\'e de Sherbrooke, Sherbrooke, Qu\'ebec, Canada), Ciprian Padurariu (Institute for Complex Quantum Systems and IQST, University of Ulm, Ulm, Germany…

Amplification and Detection of Single Itinerant Microwave Photons
Single-photon detectors are an essential part of the toolbox of modern quantum optics for implementing quantum technologies and enabling tests of fundamental physics. The low energy of microwave photons, the natural signal path for superconducting quantum devices, makes their detection much harder than for visible light. Despite impressive progress in recent years and the proposal and realization of a number of different detector architectures, the reliable detection of a single itinerant micro…

Direct measurement of photons from the electron-hadron bremsstrahlung at the EIC
L. Adamczyk, Y. Ali, J. J. Chwastowski, A. B. Kowalewska, B. Pawlik, K. Piotrzkowski, M. Przybycien
https://arxiv.org/abs/2510.05259

Direct measurement of photons from the electron-hadron bremsstrahlung at the EIC
Direct detection of bremsstrahlung photons, in principle, offers the most straightforward and most robust method of luminosity determination at the EIC, but requires an extraordinary performance of the photon detector. In this paper, we first discuss the extreme working conditions for such detectors at the EIC and the resulting technology choices. Then, we report the initial results of Monte Carlo simulations, using Geant4, of the proposed sampling calorimeter, which is made of a copper absorbe…

Here's some space photons I snapped up before they hit my driveway.
Flame Nebula and Horsehead Nebula in Orion.
#astrophotography

Attosecond-resolved quantum fluctuations of light and matter
Matan Even Tzur, Chen Mor, Noa Yaffe, Michael Birk, Andrei Rasputnyi, Omer Kneller, Ido Nisim, Ido Kaminer, Maria Chekhova, Michael Krueger, Misha Ivanov, Nirit Dudovich, Oren Cohen
https://arxiv.org/abs/2511.18362 https://arxiv.org/pdf/2511.18362 https://arxiv.org/html/2511.18362
arXiv:2511.18362v1 Announce Type: new
Abstract: Until recently, attosecond optical spectroscopy and quantum optics evolved along non-overlapping directions. In attosecond science, attosecond pulses have been regarded as classical waves, applied to probe electron dynamics on their natural time scale. Here, we transfer fundamental concepts of quantum optics into attosecond physics, enabling control of both the properties of the XUV attosecond pulses and the quantum fluctuations of matter on attosecond time scales. By combining bright squeezed vacuum (BSV) with a strong laser field to drive high-harmonic generation, we transfer the quantum properties of the BSV onto the resulting XUV attosecond pulses. Applying advanced attosecond interferometry, we reconstruct the quantum state of the XUV high harmonics and their associated attosecond pulses with attosecond precision. Finally, we resolve the squeezing of the electron's wavepacket during one of the most fundamental strong-field phenomena - field induced tunneling. The ability to measure and control quantum correlations in both electrons and XUV attosecond pulses establishes a foundation for attosecond quantum electrodynamics, manipulating the quantum state of electrons and photons with sub-cycle precision.
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Search for a resonance decaying into a scalar particle and a Higgs boson in the final state with two bottom quarks and two photons with 199 fb$^{-1}$ of data collected at $\sqrt{s}$=13 TeV and $\sqrt{s}$=13.6 TeV with the ATLAS detector
ATLAS Collaboration
https://arxiv.org/abs/2510.02857

Search for a resonance decaying into a scalar particle and a Higgs boson in the final state with two bottom quarks and two photons with 199 fb$^{-1}$ of data collected at $\sqrt{s}$=13 TeV and $\sqrt{s}$=13.6 TeV with the ATLAS detector
A search for the resonant production of a heavy scalar $X$ decaying into a Higgs boson and a lighter scalar $S$, through the process $X \rightarrow S (\rightarrow b \bar{b})H ( \rightarrow γγ)$, where the two photons are consistent with the Higgs boson decay, is performed. The search is conducted using integrated luminosities of 140 fb$^{-1}$ and 58.6 fb$^{-1}$ of proton-proton collision data at centre-of-mass energies of 13 TeV and 13.6 TeV respectively, recorded with the ATLAS detector at t…

Testing new-physics scenarios with the combined LHAASO and Carpet-3 fluence spectrum of GRB 221009A: axion-like particles and Lorentz-invariance violation
P. S. Satunin, S. V. Troitsky
https://arxiv.org/abs/2510.07234

Testing new-physics scenarios with the combined LHAASO and Carpet-3 fluence spectrum of GRB 221009A: axion-like particles and Lorentz-invariance violation
From gamma-ray burst (GRB) 221009A, very high-energy photons were detected: >10 TeV with LHAASO and >100 TeV with Carpet-3. Such energetic photons are expected to be absorbed via electron-positron pair production on their way to the Earth. Their observation might be explained by new physics, including Lorentz invariance violation (LIV) or photon mixing with axion-like particles (ALPs). Here, we construct a joint fluence spectrum by combining flux measurements from both experiments, and fit it u…

Today's photons

The effect of a short mean free path on HII regions and 21-cm tomography during reionization
Michael M. Wyatt, Steven R. Furlanetto, Mary H. Minasyan
https://arxiv.org/abs/2510.09750

The effect of a short mean free path on HII regions and 21-cm tomography during reionization
Recent measurements of the mean free path (MFP) of ionizing photons at $z=6$ find that it is significantly shorter than extrapolations from lower $z$. This has a substantial impact on the topology of reionization and thus the prospects of tomography of the 21-cm signal from upcoming radio interferometers. In this work we develop the first analytic model of reionization which explicitly incorporates the MFP as a free parameter, allowing us to transparently explore its effect on the process. Our …

Planetary Nebula Evolution for Single Stellar Models. The Formation of Neutral Spikes
Guillermo Garcia-Segura, Arturo Manchado, Jesus A. Toala, Martin A. Guerrero, Alberto J. Castro-Tirado
https://arxiv.org/abs/2510.08721

Planetary Nebula Evolution for Single Stellar Models. The Formation of Neutral Spikes
Two-dimensional hydrodynamical simulations are presented from the formation up to the late evolution of planetary nebula, for 6 different stellar models from 1 to 5 Mo. The hydrodynamical models use stellar evolution calculations as inner boundary conditions and updated values for the number of ionizing photons. Special emphasis is placed on the formation of neutral spikes, as recently observed by the James Webb Space Telescope. The results indicate that neutral spikes can be detected either at…

Learning interpretable closures for thermal radiation transport in optically-thin media using WSINDy
Daniel Messenger, Ben Southworth, Hans Hammer, Luis Chacon
https://arxiv.org/abs/2510.11840

Learning interpretable closures for thermal radiation transport in optically-thin media using WSINDy
We introduce an equation learning framework to identify a closed set of equations for moment quantities in 1D thermal radiation transport (TRT) in optically thin media. While optically thick media admits a well-known diffusive closure, the utility of moment closures in providing accurate low-dimensional surrogates for TRT in optically thin media is unclear, as the mean-free path of photons is large and the radiation flux is far from its Fickean limit. Here, we demonstrate the viability of using…

REBELS-IFU: Linking damped Lyman-$\alpha$ absorption to [CII] emission and dust content in the EoR
Lucie E. Rowland, Kasper E. Heintz, Hiddo Algera, Mauro Stefanon, Jacqueline Hodge, Rychard Bouwens, Manuel Aravena, Elisabete da Cunha, Pratika Dayal, Andrea Ferrara, Rebecca Fisher, Valentino Gonz\'alez, Hanae Inami, Olena Komarova, Ilse de Looze, Themiya Nanayakkara, Katherine Ormerod, Andrea Pallottini, Clara L. Pollock, Renske Smit, Paul van der Werf, Joris Witstok

REBELS-IFU: Linking damped Lyman-$α$ absorption to [CII] emission and dust content in the EoR
Neutral gas in galaxies during the Epoch of Reionisation regulates star formation, dust growth, and the escape of ionising photons, making it a key ingredient in understanding both galaxy assembly and reionisation. Yet, direct constraints on the HI content of galaxies at z>6 have been scarce. With JWST, Ly$α$ damping wings in galaxy spectra can now provide a direct probe of this neutral component. We analyse JWST/NIRSpec prism spectra of 12 UV-luminous galaxies from the REBELS-IFU program at z…

Analytic timing calculations and timing limits with prompt photons, high-aspect-ratio crystals, and complex TOF-kernels in TOF-PET
Nicolaus Kratochwil, Emilie Roncali, Gerard Arino-Estrada
https://arxiv.org/abs/2510.05461

Analytic timing calculations and timing limits with prompt photons, high-aspect-ratio crystals, and complex TOF-kernels in TOF-PET
Modeling the timing performance of light-based radiation detectors accurately is essential for optimizing time-of-flight positron emission tomography (TOF-PET). We present an analytic framework that combines existing models to predict the timing behavior of high-aspect ratio crystals, including contributions from prompt photons such as Cherenkov radiation. This framework is built on a closed-form solution for optical light transport, convolved with the photodetector response and photon producti…

Emergent Denoising of SDSS Galaxy Spectra Through Unsupervised Deep Learning
Oliver Camilleri, Zahra Sharbaf, Ignacio Ferreras
https://arxiv.org/abs/2510.08411 https://

Emergent Denoising of SDSS Galaxy Spectra Through Unsupervised Deep Learning
Spectroscopy represents the ideal observational method to maximally extract information from galaxies regarding their star formation and chemical enrichment histories. However, absorption spectra of galaxies prove rather challenging at high redshift or in low mass galaxies, due to the need to spread the photons into a relatively large set of spectral bins. For this reason, the data from many state-of-the-art spectroscopic surveys suffer from low signal-to-noise (S/N) ratios, and prevent accurat…

Enhanced Axion-Photon Conversion via Seeded Photons instead of Resonant Cavities for Short-Pulse Axion Detection
Xiangyan An, Min Chen, Jianglai Liu, Zhengming Sheng, Jie Zhang
https://arxiv.org/abs/2509.21417

Enhanced Axion-Photon Conversion via Seeded Photons instead of Resonant Cavities for Short-Pulse Axion Detection
We propose a seeded axion-photon conversion scheme to enhance the sensitivity of light-shining-through-wall (LSW) experiments for axion detection, where the axions are generated from short pulse lasers and the usual resonant cavity is not applicable. By injecting a small, coherent seed electromagnetic field (EM field) into the axion-photon conversion region, the axion-induced EM field can constructively interfere with the seed field, amplifying the regenerated photon number beyond the unseeded …

Modeling gamma-ray signatures of particle acceleration in stellar clusters from GeV to PeV
A. Inventar, S. Gabici, E. Peretti
https://arxiv.org/abs/2510.12562 https://

Modeling gamma-ray signatures of particle acceleration in stellar clusters from GeV to PeV
Young massive stellar clusters (YMSCs) have recently regained interest as PeVatron candidates, potentially accounting for the cosmic-ray (CR) knee as alternatives to isolated supernova remnants (SNRs). LHAASO's unique capability to detect photons above 0.1 PeV, hence tracing multi-PeV CRs, can provide critical constraints on galactic acceleration models when combined with H.E.S.S. and Fermi-LAT data. We investigate the transport of particles from YMSCs acceleration sites, namely wind terminatio…

Microwave-to-Optical Quantum Transduction of Photons for Quantum Interconnects
Akihiko Sekine, Ryo Murakami, Yoshiyasu Doi
https://arxiv.org/abs/2509.26349 https://

Microwave-to-Optical Quantum Transduction of Photons for Quantum Interconnects
The quantum transduction, or equivalently quantum frequency conversion, is vital for the realization of, e.g., quantum networks, distributed quantum computing, and quantum repeaters. The microwave-to-optical quantum transduction is of particular interest in the field of superconducting quantum computing, since interconnecting dilution refrigerators is considered inevitable for realizing large-scale quantum computers with fault-tolerance. In this review, we overview recent theoretical and experi…

Crosslisted article(s) found for nucl-ex. https://arxiv.org/list/nucl-ex/new
[1/1]:
- Direct measurement of photons from the electron-hadron bremsstrahlung at the EIC
L. Adamczyk, Y. Ali, J. J. Chwastowski, A. B. Kowalewska, B. Pawlik, K. Piotrzkowski, M. Przybycien

Determining the Density of In-gap States in Organic Semiconductors: A Pitfall of Photoelectron Yield Spectroscopy
Ryotaro Nakazawa, Masaya Kitaoka, Ryota Kaimori, Manato Tateno, Runa Hoshikawa, Yuya Tanaka, Hisao Ishii
https://arxiv.org/abs/2510.00865

Determining the Density of In-gap States in Organic Semiconductors: A Pitfall of Photoelectron Yield Spectroscopy
Accurate determination of electronic states with low density in the bandgap (in-gap states) is crucial for understanding and optimizing the performance of organic optoelectronic devices. In the device research field, photoelectron yield spectroscopy (PYS) has been widely used to evaluate such states, and its derivative is commonly employed to estimate the density of states (DOS). However, low-energy photons in PYS can generate excitons and anions in organic semiconductors, raising questions abo…

Detection of Axion Stars in Galactic Magnetic Fields
Kuldeep J. Purohit, Jitesh R. Bhatt, Subhendra Mohanty, Prashant K. Mehta
https://arxiv.org/abs/2510.11032 https://

Detection of Axion Stars in Galactic Magnetic Fields
We perform a linear mode analysis of a uniformly distributed cloud of axion-like particles (ALPs) embedded in a magnetized intergalactic medium, in order to investigate the stability of axion stars under realistic astrophysical conditions. We find that when the frequency $ω$ of transverse waves is much smaller than the collision frequency $ν_c$ of the intergalactic plasma, the conversion of ALPs into photons occurs on timescales far longer than the age of the Universe, ensuring stability of t…

Replaced article(s) found for hep-lat. https://arxiv.org/list/hep-lat/new
[1/1]:
- Emergent photons and mechanisms of confinement
Jeffrey Giansiracusa, David Lanners, Tin Sulejmanpasic

Arbitrary control of the temporal waveform of photons during spontaneous emission
Carl Thomas, Rebecca Munk, Boris Blinov
https://arxiv.org/abs/2511.23462 https://

Optimization of the time-multiplexed SPDC source at 900-950 nm range
V. O. Gotovtsev, I. V. Dyakonov, O. V. Borzenkova, K. A. Taratorin, T. B. Dugarnimaev, A. A. Korneev, S. P. Kulik, S. S. Straupe
https://arxiv.org/abs/2510.12556

Optimization of the time-multiplexed SPDC source at 900-950 nm range
In the field of quantum technology, single photons have emerged as a pivotal resource, prompting the development of heralded single photon sources (HSPS) with enhanced generation probability. The majority of such sources are based on spontaneous parametric down-conversion (SPDC), but they exhibit a low single photon generation probability. The multiplexing principle (arXiv:quant-ph/0205103) has been proposed as a solution to this problem. This paper presents a demonstration of a time-multiplexe…

Excitation energy of fission fragments within nuclear time-dependent density functional theory
Antonio Bjel\v{c}i\'c, Nicolas Schunck, Marc Verriere
https://arxiv.org/abs/2510.06701

Excitation energy of fission fragments within nuclear time-dependent density functional theory
The number and properties of the neutrons and photons emitted in nuclear fission are directly related to the excitation energy of the fission fragments when they are formed at scission. Though not observable experimentally because of the extremely short time scales, the excitation energy of fission fragments can be predicted by microscopic theory based on time-dependent density functional theory (TDDFT). Initial results on the value of the total kinetic energy of fission reactions were very pro…

Crosslisted article(s) found for physics.plasm-ph. https://arxiv.org/list/physics.plasm-ph/new
[1/1]:
- Enhanced Axion-Photon Conversion via Seeded Photons instead of Resonant Cavities for Short-Pulse ...
Xiangyan An, Min Chen, Jianglai Liu, Zhengming Sheng, Jie Zhang

Pion bremsstrahlung in the splitting function formalism and the dark photon production
Dmitry Gorbunov, Ekaterina Kriukova
https://arxiv.org/abs/2510.00213 https://

Pion bremsstrahlung in the splitting function formalism and the dark photon production
We study the production of hypothetical vector portal mediators, dark photons $γ^\prime$, with masses in the range 0.4-3.5 GeV in the negatively charged pion-proton collisions $π^-p\rightarrow γ^\prime X$ via inelastic pion bremsstrahlung and QCD Drell-Yan-like process. In both cases we estimate the value of total dark photon production cross section and obtain the energy distribution for dark photons that could be produced in the NA64h experiment. We also present the mean energies of dark p…

Primary Proca Hair and the Double-Peak Optics of Black Holes
R. A. Konoplya, D. Ovchinnikov, J. Schee
https://arxiv.org/abs/2510.05947 https://arxiv.org/pd…

Primary Proca Hair and the Double-Peak Optics of Black Holes
We study the optical properties of black holes endowed with primary Proca hair, focusing on the distinctive double-peak structure generated in the effective potential by the massive vector field. This novel feature drastically modifies the geodesic motion of both photons and massive particles, leading to qualitatively new dynamical and observational signatures. We derive and analyze the effective potentials, classify time-like and null geodesics, and identify the conditions for multiple circula…

Replaced article(s) found for physics.app-ph. https://arxiv.org/list/physics.app-ph/new
[1/1]:
- Low-loss polarization-maintaining router for single and entangled photons at a telecom wavelength
Pengfei Wang, Soyoung Baek, Masahiro Yabuno, Shigehito Miki, Hirotaka Terai, Fu…

Crosslisted article(s) found for physics.med-ph. https://arxiv.org/list/physics.med-ph/new
[1/1]:
- Analytic timing calculations and timing limits with prompt photons, high-aspect-ratio crystals, a...
Nicolaus Kratochwil, Emilie Roncali, Gerard Arino-Estrada

A Sample of HeII {\lambda}4686 "Changing-Look" Quasars
Wentao Lu, Jun-Xian Wang
https://arxiv.org/abs/2510.06753 https://arxiv.org/pdf/2510.06753…

A Sample of HeII λ4686 "Changing-Look" Quasars
We present the first systematic search for "changing-look" ("CL") behavior in the broad He ii λ4686 emission line in quasars, utilizing repeated spectroscopy from the Sloan Digital Sky Survey (SDSS). The He ii line, originating from high-ionization gas and powered by extreme ultraviolet photons, serves as a sensitive tracer of changes in the ionizing continuum. After applying strict spectral selection criteria and visual inspection to a parent sample of over 9,000 quasars with multi-epoch spec…

Purcell-enhanced single-photon generation from CsPbBr$_3$ quantum dots in in-situ selected Laguerre-Gaussian modes
Virginia Oddi, Darius Urbonas, Etsuki Kobiyama, Ioannis Georgakilas, Ihor Cherniukh, Kseniia Shcherbak, Chenglian Zhu, Maryna I. Bodnarchuk, Maksym V. Kovalenko, Rainer F. Mahrt, Gabriele Rain\`o, Thilo St\"oferle
https://

Purcell-enhanced single-photon generation from CsPbBr$_3$ quantum dots in in-situ selected Laguerre-Gaussian modes
Single photons in Laguerre-Gaussian (LG) beams, which carry orbital angular momentum (OAM), could enable more robust and efficient photonic quantum communication and information processing, as well as enhanced sensitivity in quantum metrology and imaging. However, as most implementations are indirect or require additional mode-shaping elements, direct generation of single photons with OAM has received growing interest. Colloidal lead halide perovskite quantum dots (QDs) have recently emerged as…

Sub-Threshold Fermi-LAT Sources in the Vicinity of KM3-230312A
Angelina Sherman, Nestor Mirabal, David Guevel, Ke Fang, Kohta Murase, Elizabeth Hays
https://arxiv.org/abs/2510.09101

Sub-Threshold Fermi-LAT Sources in the Vicinity of KM3-230312A
The KM3NeT collaboration has recently reported the detection of an extraordinary ultra-high-energy neutrino event with an energy of 220 PeV. Ultrahigh energy neutrinos and gamma-rays are co-produced in ultrahigh energy cosmic-ray interactions. The ultrahigh energy gamma-rays produced alongside the KM3NeT neutrino may quickly cascade down to lower energies due to interactions with intergalactic photons and magnetic fields. Because of this, the KM3NeT neutrino could be accompanied by an observabl…

Topological surface magnon-polariton in an insulating canted antiferromagnet
Weixin Li, Rundong Yuan, Fenglin Zhong, Bo Peng, Jean-Philippe Ansermet, Haiming Yu
https://arxiv.org/abs/2510.08334

Topological surface magnon-polariton in an insulating canted antiferromagnet
Excitation and control of antiferromagnetic magnon modes lie at the heart of coherent antiferromagnetic spintronics. Here, we propose a topological surface magnon-polariton as the potential means to excite antiferromagnetic magnons in the prototypical magnonic material hematite. We show that in an insulating canted antiferromagnet, where the magnons can strongly couple to photons using electrical on-chip layouts, a surface magnon-polariton mode exists in the gap of the bulk magnon-photon bands.…

SQuaD: Smart Quantum Detection for Photon Recognition and Dark Count Elimination
Karl C. Linne (Kai Li), Sho Uemura, Yue Ji, Andrew Karmen, Allen Zang, Alex Kolar, Martin Di Federico, Orlando Quaranta, Gustavo Cancelo, Tian Zhong
https://arxiv.org/abs/2509.24383

SQuaD: Smart Quantum Detection for Photon Recognition and Dark Count Elimination
Quantum detectors of single photons are an essential component for quantum information processing across computing, communication and networking. Today's quantum detection system, which consists of single photon detectors, timing electronics, control and data processing software, is primarily used for counting the number of single photon detection events. However, it is largely incapable of extracting other rich physical characteristics of the detected photons, such as their wavelengths, polari…

New Tests of Low-Scale Quantum Gravity with Cosmic-Ray Collisions
Manuel Ettengruber, Gonzalo Herrera
https://arxiv.org/abs/2510.11879 https://arxiv.org/pd…

New Tests of Low-Scale Quantum Gravity with Cosmic-Ray Collisions
Cosmic ray collisions at high center of mass energy could enable graviton and black hole production as expected in theories of low-scale quantum gravity, such as extra-dimensions, many species, or some versions of string theory. Here we propose three novel phenomenological tests of these theories. We first consider the collision of cosmic rays with ambient protons, electrons and photons in Active Galactic Nuclei (AGN), finding that high-energy neutrino data from the blazar TXS 0506+056 places a…

Improved Dark Photon Sensitivity from the Dark SRF Experiment
Saarik Kalia, Zhen Liu, Bianca Giaccone, Oleksandr Melnychuk, Roman Pilipenko, Asher Berlin, Anson Hook, Sergey Belomestnykh, Crispin Contreras-Martinez, Daniil Frolov, Timergali Khabiboulline, Yuriy Pischalnikov, Sam Posen, Oleg Pronitchev, Vyacheslav Yakovlev, Anna Grassellino, Roni Harnik, Alexander Romanenko

Improved Dark Photon Sensitivity from the Dark SRF Experiment
We report the refined dark-photon exclusion bound from Dark SRF's pathfinder run. Our new result is driven by improved theoretical modeling of frequency instability in high-quality resonant experiments. Our analysis leads to a constraint that is an order of magnitude stronger than previously reported (corresponding to a signal-to-noise ratio that is four orders of magnitude larger). This result represents the world-leading constraint on non-dark-matter dark photons over a wide range of masses b…

Towards polarization-enhanced PET: Study of random background in polarization-correlated Compton events
Ana Marija Ko\v{z}uljevi\'c, Tomislav Bokuli\'c, Darko Gro\v{s}ev, Siddharth Parashari, Luka Paveli\'c, Marinko Rade, Marijan \v{Z}uvi\'c, Mihael Makek
https://arxiv.org/abs/2510.11504

Towards polarization-enhanced PET: Study of random background in polarization-correlated Compton events
Positron Emission Tomography (PET) is a medical imaging modality that utilizes positron-emitting isotopes, such as Ga-68 and F-18, for many diagnostic purposes. The positron annihilates with an electron from the surrounding area, creating two photons of 511 keV energy and opposite momenta, entangled in their orthogonal polarizations. When each photon undergoes a Compton scattering process, the difference of their azimuthal scattering angles reflects the initial orthogonality of their polarizati…

Possibility of Inducing $^{241}$Am Fluctuations (Primakoff Photon-Magnetic Field Coupling Experiment)
C. Scarlett, E. Fischbach, B. Freeman, J. J. Coy, P. Edwards, D. Osborne, J. Edwards, L. Mwibanda, A. Alsayegh, M. Chiu
https://arxiv.org/abs/2510.03523

Possibility of Inducing $^{241}$Am Fluctuations (Primakoff Photon-Magnetic Field Coupling Experiment)
This paper reports on results from an experiment designed to search for exotic particles interacting with nuclear matter. These particles could be created through the Primakoff coupling between photons and an external magnetic field. Theory suggests this coupling leads to the production of weakly interacting particles (e.g. axions) that are important to understanding the lack of a measured neutron electric dipole moment (nEDM). The current experiment has been run to look for evidence of weakly …

Two-Photon Induced Coherence without Induced Emission
Dong-Gil Im, Seung-Yeun Yoo, Chung-Hyun Lee, Jongheon Suh, Yoon-Ho Kim
https://arxiv.org/abs/2510.09392 https://

Two-Photon Induced Coherence without Induced Emission
At the heart of recent advances in quantum imaging and spectroscopy with undetected photons is the quantum optical effect known as induced coherence without induced emission. This quantum interference effect has enabled access to challenging wavelength regimes for imaging and spectroscopic applications. However, the potential of undetected photon quantum metrology, particularly the enhanced phase sensitivity offered by Fock or N00N states, has not yet been realized, as prior work focused only o…

Demagnetization-Driven Nanoscale Chirality-Selective Thermal Switch
In Hyeok Choi, Daeheon Kim, Yeon Jong Jin, Seungmo Yang, Tae-Seong Ju, Changsoo Kim, Chanyong Hwang, Dongbin Shin, Jong Seok Lee
https://arxiv.org/abs/2509.24205

Demagnetization-Driven Nanoscale Chirality-Selective Thermal Switch
Chiral-lattice degrees of freedom can offer novel chirality-selective functionalities for thermotronic applications. Chiral phonons, carrying both heat and angular momentum, can emerge through a breaking of chiral degeneracy in the phonon bands, either via an intrinsic chiral crystal structure or by angular momentum transfer from photons or spins. This chiral controllability of the lattice dynamics enables a design of chiral thermo-devices by integrating ferromagnets with chiral materials. Here…

Rotation of intrinsic orbital angular momentum and the orbital Hall effect for twisted particles in arbitrary gravitational fields
Alexander J. Silenko
https://arxiv.org/abs/2510.03450

Rotation of intrinsic orbital angular momentum and the orbital Hall effect for twisted particles in arbitrary gravitational fields
For twisted particles in arbitrary gravitational fields, the problems of the rotation of intrinsic orbital angular momentum and the orbital Hall effect are solved in the general case. We need not use the Maxwell equations in curved spacetimes for a description of twisted photons. The exact general equation rigorously defining the OAM dynamics in any Riemannian spacetimes is derived. The general description of different manifestations of the orbital Hall effect for any twisted particles is also …

Neutrinogenic CMB spectral distortions
Shao-Ping Li, Jens Chluba
https://arxiv.org/abs/2510.04684 https://arxiv.org/pdf/2510.04684

Neutrinogenic CMB spectral distortions
Extra radiation injection after neutrino decoupling in the early Universe contributes to the effective number of neutrino species that can be constrained by the cosmic microwave background (CMB). However, any effective neutrino number itself cannot uniquely determine the underlying source. We argue that the degeneracy can be relaxed by CMB spectral distortions, which are caused by energy exchange between the extra radiation and photons. We consider neutrinogenic CMB spectral distortions, where …

Expanding the Landscape of Exotic Muon Decays
Admir Greljo, Ajdin Palavri\'c, Mirsad Tunja, Jure Zupan
https://arxiv.org/abs/2510.08674 https://arxiv.o…

Expanding the Landscape of Exotic Muon Decays
We chart new-physics models that produce exotic, high-multiplicity muon decays featuring prompt or displaced $e^+e^-$ pairs and/or photons, with or without missing energy, such as $μ\to 5e$, $μ\to 7e$, etc. Starting from an effective-field-theory perspective, we estimate the reach on the ultraviolet scale and identify conditions under which lower-multiplicity modes are suppressed or occur at comparable rates. We then construct explicit realizations in minimal dark-sector models with light, fe…

A quantum-coherent photon--emitter interface in the original telecom band
Marcus Albrechtsen, Severin Kr\"uger, Juan Loredo, Lucio Stefan, Zhe Liu, Yu Meng, Lukas L. Niekamp, Bianca F. Seyschab, Nikolai Spitzer, Richard J. Warburton, Peter Lodahl, Arne Ludwig, Leonardo Midolo
https://arxiv.org/abs/2510.09251

A quantum-coherent photon--emitter interface in the original telecom band
Quantum dots stand out as the most advanced and versatile light-matter interface available today. Their ability to deliver high-quality, high-rate, and pure photons has set benchmarks that far surpass other emitters. Yet, a critical frontier has remained elusive: achieving these exceptional capabilities at telecom wavelengths, bridging the gap to fiber-optic infrastructure and scalable silicon photonics. Overcoming this challenge demands high quality quantum materials and devices which, despite…

Switchable spin-photon coupling with hole spins in single-quantum dots
Carlos Sagaseta, Mar\'ia Jos\'e Calder\'on, Jos\'e Carlos Abadillo-Uriel
https://arxiv.org/abs/2510.05301

Switchable spin-photon coupling with hole spins in single-quantum dots
Spin qubits in semiconductor quantum dots offer a gate-tunable platform for quantum information processing. While two-qubit interactions are typically realized through exchange coupling between neighboring spins, coupling spin qubits to photons via hybrid spin-cQED devices enables long-range interactions and integration with other cQED platforms. Here, we investigate hole spin-photon coupling in compact single quantum dot setups. By incorporating ubiquitous strain inhomogeneities to our theory,…

WISPFI Experiment: Prototype Development
Josep Maria Batllori, Dieter Horns, Marios Maroudas
https://arxiv.org/abs/2510.01221 https://arxiv.org/pdf/2510.01…

WISPFI Experiment: Prototype Development
Axions and axion-like particles (ALPs) are well-motivated dark matter (DM) candidates that couple to photons in external magnetic fields. The parameter space around $m_a \sim 50~μ$eV remains largely unexplored by haloscope experiments. We present the first prototype of WISP Searches on a Fiber Interferometer (WISPFI), a table-top, model-independent scheme based on resonant photon-axion conversion in a hollow-core photonic crystal fiber (HC-PCF) integrated into a Mach-Zehnder interferometer (MZ…

The JWST EXCELS Survey: A spectroscopic investigation of the ionizing properties of star-forming galaxies at 1<z<8
R. Begley, R. J. McLure, F. Cullen, A. C. Carnall, T. M. Stanton, D. Scholte, D. J. McLeod, J. S. Dunlop, K. Z. Arellano-C\'ordova, C. Bondestam, C. T. Donnan, M. L. Hamadouch, A. E. Shapley, S. Stevenson
https://arx…

The JWST EXCELS Survey: A spectroscopic investigation of the ionizing properties of star-forming galaxies at 1
Charting the Epoch of Reionization demands robust assessments of what drives the production of ionizing photons in high-redshift star-forming galaxies (SFGs), and requires better predictive capabilities from current observations. Using a sample of $N=159$ SFGs at $1