Tootfinder

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 …

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…

$\Sigma^{ }$ production in pp collisions at $\sqrt{s} = 13$ TeV
ALICE Collaboration
https://arxiv.org/abs/2508.20808 https://arxiv.org/pdf/2508.20808

$Σ^{+}$ production in pp collisions at $\sqrt{s} = 13$ TeV
The measurement of $Σ^{+}$ production in pp collisions at $\sqrt{s} = 13$ TeV is presented. The measurement is performed at midrapidity in both minimum-bias and high-multiplicity pp collisions at $\sqrt{s} = 13$ TeV. The $Σ^{+}$ is reconstructed via its weak-decay topology in the decay channel $Σ^{+} \rightarrow {\rm p} + π^{0}$ with $π^{0} \rightarrow γ+ γ$. In a novel approach, the neutral pion is reconstructed by combining photons that convert in the detector material with photons mea…

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…

Direct Collapse Black Hole Candidates from Decaying Dark Matter
Yash Aggarwal, James B. Dent, Philip Tanedo, Tao Xu
https://arxiv.org/abs/2509.25325 https://

Direct Collapse Black Hole Candidates from Decaying Dark Matter
Injecting 1-13.6 eV photons into the early universe can suppress the molecular hydrogen abundance and alter the star formation history dramatically enough to produce direct collapse black holes. These, in turn, could explain the recently observed population of puzzling high-redshift supermassive black holes that appear to require super-Eddington accretion. We show that axion dark matter decay in the intergalactic medium can account for this energy injection. We use a single zone model of the ga…

Harnessing the Diamond-Air Interface as an Efficient Photon Antenna for Solid-State Emitters
Paul Weinbrenner, Aina Lopez Benet, \.Idil G\"ozel, Friedemann Reinhard
https://arxiv.org/abs/2509.26071

Harnessing the Diamond-Air Interface as an Efficient Photon Antenna for Solid-State Emitters
Extracting photons from defect centers is challenging due to the high refractive index of typical substrates. For nitrogen-vacancy centers in diamond, reaching saturation count rates above $2.5\times10^5\,\mathrm{counts}/\mathrm{s}$ so far requires nanofabricated optics like diamond waveguides or solid immersion lenses. Here we present an experimental and theoretical study of defect center emission at unmodified planar dielectric surfaces by quantitative back focal plane imaging and analytical …

A machine learning approach to axion-like particle searches in CTAO observations of blazars
Francesco Schiavone (Bari Univ, INFN Bari), Leonardo Di Venere (INFN Bari), Francesco Giordano (Bari Univ, INFN Bari)
https://arxiv.org/abs/2509.24543

A machine learning approach to axion-like particle searches in CTAO observations of blazars
Axion-like particles (ALPs) are a common prediction of several extensions of the Standard Model of particle physics and could be detected through their coupling to photons, which enables ALP-photon conversions in external magnetic fields. This conversion could lead to two distinct signatures in gamma-ray spectra of blazars: a superimposition of energy-dependent "wiggles" on the spectral shape, and a hardening at high (multi-TeV) energies, due to the ALP beam eluding absorption by the extragalac…

Heard a particular application of the definition of Planck's constant I wasn't aware of that made more real for me "we just can't see that small" and drove home that it was not about "quantiziation of spacetime".
I knew Planck energy was where a photon could become a black hole - but "our particle smashing makes black holes past a certain point" didn't say much to me about spacetime itself.
But today I was reading and saw where someone pointed out that beyond a certain scale, we use photons and light for studying reality - and that a photon with Planck wavelength by definition would have Planck energy.
So to make light of the right wavelength to study features of reality smaller than Planck length, you'd -also- trigger the black hole behavior.
For some reason this explanation sits _way_ better in my head. I get they're all related, I'd just never heard this angle of it in this particular way before.

Single-Photon Detection in Few-Layer NbSe$_2$ Superconducting Nanowires
Lucio Zugliani, Alessandro Palermo, Bianca Scaparra, Aniket Patra, Fabian Wietschorke, Pietro Metuh, Athanasios Paralikis, Domenico De Fazio, Christoph Kastl, Rasmus Flaschmann, Battulga Munkhbat, Kai M\"uller, Jonathan J. Finley, Matteo Barbone
https://arxiv.org/…

Single-Photon Detection in Few-Layer NbSe$_2$ Superconducting Nanowires
Superconducting Nanowire Single-Photon Detectors (SNSPDs) are key building blocks for photonic quantum technologies due to their ability to detect single photons with ultra-high efficiency, low dark counts and fast temporal resolution. Superconducting materials exhibiting high uniformity, large absorption cross-section and atomic-scale thickness are desirable to extend single-photon detection from the near-infrared up to the terahertz regime, where existing material choices are especially const…

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…

The Missing Hard Photons of Little Red Dots: Their Incident Ionizing Spectra Resemble Massive Stars
Bingjie Wang, Joel Leja, Harley Katz, Kohei Inayoshi, Nikko J. Cleri, Anna de Graaff, Raphael E. Hviding, Pieter van Dokkum, Jenny E. Greene, Ivo Labb\'e, Jorryt Matthee, Ian McConachie, Rohan P. Naidu, Erica J. Nelson
https://arxiv.org/…

The Missing Hard Photons of Little Red Dots: Their Incident Ionizing Spectra Resemble Massive Stars
The nature of Little Red Dots (LRDs) has largely been investigated through their continuum emission, with lines assumed to arise from a broad-line region. In this paper, we instead use recombination lines to infer the intrinsic properties of the central engine of LRDs. Our analysis first reveals a tension between the ionizing properties implied from H$α$ and HeII$\,λ$4686. The high H$α$ EWs require copious H-ionizing photons, more than the bluest AGN ionizing spectra can provide. In contrast…

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 …

Closure Relations of Synchrotron Self-Compton from Reverse shock and Fermi-LAT GRBs
Nissim Fraija, B. Betancourt Kamenetskaia, Antonio Galv\'an G\'amez, Maria G. Dainotti, Hermes Le\'on Vargas
https://arxiv.org/abs/2509.23345

Closure Relations of Synchrotron Self-Compton from Reverse shock and Fermi-LAT GRBs
Synchrotron radiation from the reverse- and forward-shock regions typically describes the evolution of temporal and spectral features given by the closure relations (CRs) during the late and long-/short-lasting emission in the afterglow phase of Gamma-ray bursts (GRBs). Although synchrotron photons are restricted to keV and a few MeV energies, the synchrotron self-Compton (SSC) mechanism can disperse them above hundreds of MeV energies. We present the CRs of the SSC process radiated from the re…

Toward triggered generation of indistinguishable single-photons from MoTe$_2$ quantum emitters
Pawe{\l} Wyborski, Athanasios Paralikis, Pietro Metuh, Martin A. Jacobsen, Christian Ruiz, Niels Gregersen, Battulga Munkhbat
https://arxiv.org/abs/2508.20743

Toward triggered generation of indistinguishable single-photons from MoTe$_2$ quantum emitters
Single-photon sources operating in the telecom band are fundamental components for long-distance optical quantum communication and information processing. Two-dimensional (2D) transition metal dichalcogenides (TMDs) offer a promising platform for such sources, but their development has been hindered by limited spectral range and poor single-photon indistinguishability. Here, we demonstrate a reproducible and systematic approach for generating near-infrared (1090-1200 nm) quantum emitters in bil…

Directional strong coupling at the nanoscale between hyperbolic polaritons and organic molecules
Ana I. F. Tresguerres-Mata, Olga G. Matveeva, Christian Lanza, Jos\'e \'Alvarez-Cuervo, Kirill V. Voronin, Francesco Calavalle, Garen Avedissian, Pablo D\'iaz-N\'u\~nez, Gonzalo \'Alvarez-P\'erez, Aitana Tarazaga Mart\'in-Luengo, Javier Taboada-Guti\'errez, Jiahua Duan, Javier Mart\'in-S\'anchez, Andrei Bylinkin, Rainer Hillenbrand, Artem Mishchenko, …

Directional strong coupling at the nanoscale between hyperbolic polaritons and organic molecules
Strong coupling (SC) is a fundamental concept in physics that describes extreme interactions between light and matter. Recent experiments have demonstrated SC at the nanometer scale, where strongly confined polaritons, rather than photons, couple to quantum emitters or molecular vibrations. Coupling with the latter is generally referred to as vibrational SC (VSC) and is of significant fundamental and technological interest, as it can be an effective tool for modifying molecular properties. Howe…

Replaced article(s) found for astro-ph.CO. https://arxiv.org/list/astro-ph.CO/new
[1/1]:
- Measuring photo-ionization rate and mean free path of HeII ionizing photons at $2.5 \leq z \leq 3...
Prakash Gaikwad, Frederick B. Davies, Martin G. Haehnelt

Generation of C-band entangled photon pairs by biexciton-exciton cascade from symmetric InAs/InP quantum dots
Anna Musia{\l}, Maja Wasiluk, Katarzyna Roszak, Micha{\l} Gawe{\l}czyk, Wojciech Rudno-Rudzi\'nski, Pawe{\l} Wyborski, Johann P. Reithmaier, Mohamed Benyoucef, Grzegorz S\k{e}k
https://arxiv.org/abs/2509.24500

Generation of C-band entangled photon pairs by biexciton-exciton cascade from symmetric InAs/InP quantum dots
Hereby, we study the generation of pairs of polarization-entangled photons at telecom C-band by biexciton-exciton cascade from non-resonantly excited epitaxial InAs/InP quantum dots (QDs). It is realized without external tuning of the fine structure splitting (FSS), which does not exceed 10 $μ$eV in as-grown nanostructures, due to their high in-plane symmetry. Excitonic complexes are identified by means of excitation power-dependent and polarization-resolved magneto)microphotoluminescence. The…

Search for a new scalar resonance decaying to a Higgs boson and another new scalar particle in the final state with two bottom quarks and two photons in proton-proton collisions at $\sqrt{s}$ = 13 TeV
CMS Collaboration
https://arxiv.org/abs/2508.11494

Search for a new scalar resonance decaying to a Higgs boson and another new scalar particle in the final state with two bottom quarks and two photons in proton-proton collisions at $\sqrt{s}$ = 13 TeV
A search is presented for a new scalar resonance, X, decaying to a standard model Higgs boson and another new scalar particle, Y, in the final state where the Higgs boson decays to a $\mathrm{b\bar{b}}$ pair, while the Y particle decays to a pair of photons. The search is performed in the mass range 240$-$100 \GeV for the resonance X, and in the mass range 70$-$800 GeV for the particle Y, using proton-proton collision data collected by the CMS experiment at $\sqrt{s}$ = 13 TeV, corresponding to…

Q-REACH: Quantum information Repetition, Error Analysis and Correction using Caching Network
Karl C. Linne (Kai Li), Yuanyuan Li, Debashri Roy, Kaushik Chowdhury
https://arxiv.org/abs/2509.24407

Q-REACH: Quantum information Repetition, Error Analysis and Correction using Caching Network
Quantum repeaters incorporating quantum memory play a pivotal role in mitigating loss in transmitted quantum information (photons) due to link attenuation over a long-distance quantum communication network. However, limited availability of available storage in such quantum repeaters and the impact on the time spent within the memory unit presents a trade-off between quantum information fidelity (a metric that quantifies the degree of similarity between a pair of quantum states) and qubit transm…

AGN spectral variability across activity states and searches for axion-like particles
Denys Malyshev, Lidiia Zadorozhna, Yuriy Bidasyuk, Andrea Santangelo, Oleg Ruchayskiy
https://arxiv.org/abs/2509.22344

AGN spectral variability across activity states and searches for axion-like particles
Axion-like particles (ALPs) are compelling candidates for dark matter and potential portals to new physics beyond the Standard Model. Photons traversing magnetized regions can convert into ALPs, producing characteristic, energy-dependent absorption features in astrophysical spectra. The probability of such conversions depends sensitively on both the photon energy and the properties of the intervening magnetic fields. Most existing searches have focused on individual astrophysical sources, but…

Quantum Interference of Distinguishable Photons Based on Spatially-Resolved Measurements
Miguel Angel Gonzalez, Alejandra Alarc\'on, Andres Camilo Quintero, Daniel Sabogal, Luca Maggio, Vincenzo Tamma, Daniel F. Urrego, Alejandra Valencia
https://arxiv.org/abs/2508.14845

Quantum Interference of Distinguishable Photons Based on Spatially-Resolved Measurements
We present experimental results demonstrating the quantum interference of two photons distinguishable in their transverse momenta, each entering the input ports of a balanced beam splitter. This counterintuitive interference effect is made possible through spatially resolved measurements in the near field, i.e., by resolving the conjugate variable in which the photons are distinguishable. Our experimental findings agree with theoretical predictions. We contrast our results with a non-spatially …

Emergence of Photon Bose-Einstein Condensation from Down-Scattering in Cold Electron Media
Bing'ang Guo, Wei Kou, Xurong Chen
https://arxiv.org/abs/2508.17267 https://

Emergence of Photon Bose-Einstein Condensation from Down-Scattering in Cold Electron Media
In this study, we examine the emergence of photon Bose-Einstein condensation (BEC) resulting from the interaction of high-energy photons with a cold electron gas, modeled via a modified Kompaneets equation. Beginning with an initial black-body photon spectrum, we perform numerical simulations to track the evolution of the photon distribution under the influence of inverse Compton scattering, wherein photons dissipate energy through collisions with cold electrons. Our results demonstrate a prono…

Quantum-limited optical delay sensing across an enhanced dynamic range by frequency-resolving two-photon interference
Russell M. J. Brooks, Luca Maggio, Thomas Jaeken, Joseph Ho, Erik Gauger, Vincenzo Tamma, Alessandro Fedrizzi
https://arxiv.org/abs/2509.22791

Quantum-limited optical delay sensing across an enhanced dynamic range by frequency-resolving two-photon interference
Hong-Ou-Mandel interferometry is an effective tool for precision sensing, but it faces a fundamental trade-off between dynamic range and measurement precision. To overcome this limitation, we sample the frequencies of two interfering photons, which extends the sensitivity in the time domain. This enhances the dynamic range of optical delay estimation by up to twenty times compared to the non-resolved estimates. We demonstrate this approach with independent photon sources and show the precision …

Lorentz invariance violation in the extragalactic propagation of ultra-high energy photons and in the development of showers in the Earth crust and atmosphere
Denise Boncioli, Valdir Barbosa Bezerra, Matteo Giammarco, Iarley Pereira Lobo, Pedro Morais, Francesco Salamida
https://arxiv.org/abs/2509.14753

Lorentz invariance violation in the extragalactic propagation of ultra-high energy photons and in the development of showers in the Earth crust and atmosphere
We investigate the effects of Lorentz invariance violation (LIV) on photon interactions, considering both intergalactic propagation (Breit-Wheeler process) and atmospheric interactions (Bethe-Heitler process). By incorporating LIV into the theoretical framework, we analyze how it modifies key quantities such as the cross section, threshold energy, and mean free path of photons traveling through intergalactic space. In addition, we study its impact on extensive air showers initiated by high-ener…

X-rays from Inelastic Dark Matter Freeze-in
Gordan Krnjaic, David McKeen, Riku Mizuta, Gopolang Mohlabeng, David E. Morrissey, Douglas Tuckler
https://arxiv.org/abs/2509.19428 h…

X-rays from Inelastic Dark Matter Freeze-in
We study inelastic dark matter produced via freeze-in through a light mediator with a mass splitting below the electron-positron threshold. In this regime, the heavier dark matter state is naturally long-lived compared to the age of the Universe and decays to the lighter state in association with photons. Given a light mediator, the dark matter abundance is directly related to the decay rate of the heavier dark matter. We show that observations of photons from the galactic center can effectivel…

In silico investigation of Ba-based ternary chalcogenides for photovoltaic applications
Ramya Kormath Madam Raghupathy, Hossein Mirhosseini, Thomas D. K\"uhne
https://arxiv.org/abs/2508.18796

In silico investigation of Ba-based ternary chalcogenides for photovoltaic applications
In solar cells, the absorbers are the key components for capturing solar energy and converting photons into electron-hole pairs. The search for high-performance absorbers with advantageous characteristics is an ongoing task for researchers. In this work, we investigated promising and environmentally benign Ba-based ternary chalcogenides for photovoltaic applications. The total number of Ba-based ternary chalcogenides in the Materials Project database was found to be 279. Materials screening bas…

Dark Photon Oscillations in Waveguide
Yu-Xin Tian, Wenyu Wang, Wen-Na Yang, Bin Zhu
https://arxiv.org/abs/2509.14962 https://arxiv.org/pdf/2509.14962

Dark Photon Oscillations in Waveguide
Dark photons, which can kinetically mix with ordinary photons, represent the simplest extension to the standard model. Detecting their oscillations with visible photons could provide crucial insights into the nature of dark matter and fundamental interactions beyond the standard model. We propose a novel laboratory-based approach to detect dark photon oscillations using a laser in an Optical Time-domain Relectometry (OTDR) setup. The laser light propagating through the optical fiber undergoes o…

Improving the efficiency of quantum engineering of SCSs by adding two demultiplexed input photons
Mikhail S. Podoshvedov, Sergey A. Podoshvedov
https://arxiv.org/abs/2509.14625 …

Improving the efficiency of quantum engineering of SCSs by adding two demultiplexed input photons
Conditional addition and subtraction of photons is a powerful tool for quantum engineering of continuous variable (CV) states that forms the fundamental building blocks of advanced photonic technologies. For high fidelity information processing, precise control of quantum engineering of CV states is highly demanded. We propose a scheme for measurement induced quantum engineering of even/odd superposition of coherent states (SCSs) of amplitude>2.5 and with fidelity exceeding>0.99. It includes si…

Multipolar transitions excited by twisted photons in heavy quarkonia
P. S. Korolev, V. A. Ryakin
https://arxiv.org/abs/2508.09877 https://arxiv.org/pdf/250…

Multipolar transitions excited by twisted photons in heavy quarkonia
In this study, we investigate the excitation of multipole transitions in quarkonium systems by high-energy photons carrying orbital angular momentum. We derive explicit expressions for the amplitude and probability of photoexcitation incorporating the dynamics of the quarkonium center of mass. It is shown that the leading contribution to the transitions induced by twisted photons comes from the multipole $j=|m_γ|$ and $m_γ=l'-l$ in the long-wave approximation. Despite the fact that …

Latest results from the searches for ultra-high-energy photons at the Pierre Auger Observatory
Pierpaolo Savina (for the Pierre Auger Collaboration)
https://arxiv.org/abs/2509.05113

Latest results from the searches for ultra-high-energy photons at the Pierre Auger Observatory
The Pierre Auger Observatory is the largest air-shower detector in the world, offering unparalleled exposure to photons with energies above $5 \times 10^{16}$ eV. Since the start of data collection almost two decades ago, numerous searches for photons have been conducted using the detection systems of the Observatory. These searches have led to the most stringent upper limits on the diffuse photon flux. These limits place severe constraints on current models regarding the origin of ultra-high-e…

New UPC results at the LHC - modeling the proton and neutron emission in photon-induced nuclear processes
P. Jucha, K. Mazurek, A. Szczurek, K. Pysz
https://arxiv.org/abs/2508.20791

New UPC results at the LHC - modeling the proton and neutron emission in photon-induced nuclear processes
The ultrarelativistic collisions of heavy ions provide rich spectrum of possibilities to discuss the response of the nucleus to photons. Newly published neutron and proton multiplicities measured in the ALICE experiment in ultraperipheral collisions allow investigating the influence of the electromagnetic fields on colliding nuclei for the $^{208}$Pb+$^{208}$Pb at $\sqrt{s_{NN}}$=5.02~TeV. The theoretical predictions are done within hybrid model including equivalent photon approximations (EPA),…

Strong antibunching photons/photon pairs emission in two atoms cavity QED system with the Van der Waals interaction
Zhouyang Yu, Jinping Xu, Chengjie Zhu, Zhengyang Bai, Yaping Yang
https://arxiv.org/abs/2509.11585

Strong antibunching photons/photon pairs emission in two atoms cavity QED system with the Van der Waals interaction
Weinvestigate the generation of antibunching photons and photon pairs in a two-atom cavity QED system leveraging interatomic van der Waals (vdW) interaction. We show that the vdW interaction shifts the two-atom excited state, enabling the suppression of two-photon excitation via destructive interference in a diamond configuration. This leads to antibunching photon emission with extremely high purity. Furthermore, by tuning the vdW interaction strength, the conditions for conventional …

Probing the Parameter Space of Axion-Like Particles Using Simulation-Based Inference
Pooja Bhattacharjee, Christopher Eckner, Gabrijela Zaharijas, Gert Kluge, Giacomo D'Amico
https://arxiv.org/abs/2509.20578

Probing the Parameter Space of Axion-Like Particles Using Simulation-Based Inference
Axion-like particles (ALPs), hypothetical pseudoscalar particles that couple to photons, are among the most actively investigated candidates for new physics beyond the Standard Model. Their interaction with gamma rays in the presence of astrophysical magnetic fields can leave characteristic, energy-dependent modulations in observed spectra. Capturing such subtle features requires precise statistical inference, but standard likelihood-based methods often fall short when faced with complex models…

Electrically pumped ultrabright entangled photons on chip
Xu-Feng Jiao, Ming-Yang Zheng, Yi-Hang Chen, Bo Cao, Xina Wang, Yang Liu, Cheng-Ao Yang, Xiu-Ping Xie, Chao-Yang Lu, Zhi-Chuan Niu, Qiang Zhang, Jian-Wei Pan
https://arxiv.org/abs/2508.14566

Electrically pumped ultrabright entangled photons on chip
Entangled photon sources (EPS) are essential for quantum science and technology. Despite advancements in integrated optical platforms like thin-film lithium niobate, a scalable, high-performance, chip-scale EPS has remained elusive. We address this by demonstrating an electrically pumped, post-selection-free polarization-EPS, achieved through hybrid integration of a distributed feedback laser with thin-film lithium niobate chip which integrates periodically poled lithium niobate waveguides, bea…

Magnon-photon coupling in the YIG-based disk and ring microcavities
S. S. Demirchyan, D. M. Krichevsky, V. I. Belotelov
https://arxiv.org/abs/2509.18872 https://

Novel Limits on Dark Photon Mixing from Radiation Safety
Wen Yin
https://arxiv.org/abs/2508.14885 https://arxiv.org/pdf/2508.14885

Novel Limits on Dark Photon Mixing from Radiation Safety
I propose a novel laboratory search for dark photons based on radiation-safety monitoring at synchrotron radiation facilities, including NanoTerasu, SPring-8, KEK-PF, and ESRF. Dark photons can be produced parasitically in undulators or via photon-mirror interactions, and subsequently traverse optical systems and shielding. Taking into account quantum effects and the internal structure of undulators, mirrors, and detectors, I show that even a simple Geiger-Müller counter, routinely used for ra…

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…

Replaced article(s) found for quant-ph. https://arxiv.org/list/quant-ph/new
[2/2]:
- Orbital angular momentum of entangled photons as a probe for relativistic effects
Fazilah Nothlawala, Kiki Dekkers, Moslem Mahdavifar, Jonathan Leach, Andrew Forbes, Isaac Nape

Polarization-dependent Interference in Nonlinear Compton Scattering
Zu-dong Zhao, Suo Tang
https://arxiv.org/abs/2509.09920 https://arxiv.org/pdf/2509.0992…

Polarization-dependent Interference in Nonlinear Compton Scattering
We investigate the phase interference effects in the nonlinear Compton scattering via the collision between an high-energy electron and the laser in the intermediate intensity region, and reveal that the importance of interference effects on the scattered photons depends sensitively on the relative polarization of the scattered photons and laser pulse. For scattered photons polarized parallel to the laser field, the effective distance between two interfered phase points is much larger than that…

Towards integrated sensors for optimized OCT with undetected photons
Franz Roeder, Ren\'e Pollmann, Viktor Quiring, Christof Eigner, Benjamin Brecht, Christine Silberhorn
https://arxiv.org/abs/2508.05320

Towards integrated sensors for optimized OCT with undetected photons
The development of practical sensors for optical coherence tomography (OCT) with undetected photons requires miniaturization via integration. To be practical, these sensors must exhibit a large spectral bandwidth and a high brightness, which are linked to a high axial resolution and a sufficient signal to noise ratio, respectively. Here, we combine these requirements in a scheme for OCT-measurements with undetected photons based on nonlinear Ti:LiNbO$_3$ waveguides. We investigate the performan…

Morphology of Young Massive Stellar Clusters with Next-Generation IACTs
Alberto Bonollo, Paolo Esposito, Andrea Giuliani, Patrizia Caraveo, Giorgio Galanti, Silvia Crestan, Michela Rigoselli, Sandro Mereghetti
https://arxiv.org/abs/2509.20150

Morphology of Young Massive Stellar Clusters with Next-Generation IACTs
The term PeVatron designates astrophysical objects capable of accelerating particles to PeV energies. Their nature and particle acceleration mechanisms are uncertain, but ultra-high-energy gamma rays are produced when particles accelerated by either leptonic or hadronic PeVatrons interact with the surrounding medium or radiation fields. The atmospheric air shower observatory LHAASO detected photons with energies above 100 TeV from 43 sources in the Galactic Plane, proving the existence of PeVat…

Spin Correlations in Dark Photon Searches
Jonathan L. Feng, Mi\v{s}a Toman, Eli Welch
https://arxiv.org/abs/2508.18352 https://arxiv.org/pdf/2508.18352

Spin Correlations in Dark Photon Searches
We investigate the spin correlations between production and decay in the process where dark photons $A'$ are produced in pseudoscalar meson decays, for example, $π^0, η\to γA'$, and then decay to fermion pairs, $A' \to f \bar{f}$. This process is the focus of many experimental searches, but spin correlations are typically ignored. We derive analytic results that allow us to quickly scan parameter space and quantify the error made in neglecting spin correlations. In particular, we define a di…

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…

The merger of spinning, accreting supermassive black hole binaries
Lorenzo Ennoggi, Manuela Campanelli, Julian Krolik, Scott C. Noble, Yosef Zlochower, Maria Chiara de Simone
https://arxiv.org/abs/2509.10319

The merger of spinning, accreting supermassive black hole binaries
Because they are likely to accrete substantial amounts of interstellar gas, merging supermassive binary black holes are expected to be strong multimessenger sources, radiating gravitational waves, photons from thermal gas, and photons from relativistic electrons energized by relativistic jets. Here we report on a numerical simulation that covers the late inspiral, merger, and initial postmerger phase of such a system where both black holes have the same mass and spin, and both spin axes are par…

Unquestionable Bell theorem for interwoven frustrated down conversion processes
Pawe{\l} Cie\'sli\'nski, Marcin Markiewicz, Konrad Schlichtholz, Jan-{\AA}ke Larsson, Marek \.Zukowski
https://arxiv.org/abs/2508.19207

Unquestionable Bell theorem for interwoven frustrated down conversion processes
In the Wang et al. paper "Violation of Bell inequality with unentangled photons'' [Science Advances, 1 Aug 2025 Vol 11, Issue 31], in which a brilliant experiment involving two interwoven frustrated down conversion processes is reported, Bell non-classicality of the observed interference processes is conjectured under some tacit additional assumptions. To clear any doubts about Bell non-classicality of the interference processes observed by Wang et al., we give an unconditional Bell-type proo…

Observation of topological Phenomena in a Weyl Exceptional Ring with Single Photons
Zhong-Sheng Chen, Wei-Xin Chen, Fan Wu, Zhong-Wei Xu, Jing Ma, Yun-Kun Jiang, Huai-Zhi Wu, Shi-Biao Zheng
https://arxiv.org/abs/2509.13708

Observation of topological Phenomena in a Weyl Exceptional Ring with Single Photons
Compared with Hermitian theory, non-Hermitian physics offers a fundamentally different mathematical framework, enabling the observation of topological phenomena that have no analogue in Hermitian systems. Among these, the exceptional point (EP) ring stands out as a quintessential topological feature unique to non-Hermitian systems. In this study, we employ single-photon interferometry to overcome the experimental challenge of precise phase control in quantum systems, thereby enabling a complete…

The optical analogy between a Lorentz-violating cosmos and a Magneto-Electric medium
Iman Motie, Brahim Lamine, Alain Blanchard, R\'emy Battesti, Carlo Rizzo
https://arxiv.org/abs/2509.19388

The optical analogy between a Lorentz-violating cosmos and a Magneto-Electric medium
The goal of our study is to investigate the effects of Lorentz symmetry violation by examining the behavior of photons within the framework of the Standard Model Extension (SME). We show that, from an optical point of view, the Lorentz-violating cosmos is analogous to a Magneto-Electric medium like the quantum vacuum in the presence of the magnetic and electric field. This analogy provides a formulation for exploring experimental evidence of Lorentz symmetry violation in the propagation of ligh…

Ultrafast non-adiabatic molecular energy conversion into photons induced by quantized electromagnetic fields
Arley Fl\'orez L\'opez, Johan F. Triana, Jos\'e Luis Sanz-Vicario
https://arxiv.org/abs/2509.13233

Ultrafast non-adiabatic molecular energy conversion into photons induced by quantized electromagnetic fields
Molecular polaritons within the mid-infrared regime have emerged as a source for modifying and manipulating molecular and photonic properties. However, the development of new methodologies for photon generation is still a challenge in nanophotonics. We propose a molecular model based on the Holstein-quantum-Rabi Hamiltonian, which also incorporates realistic dipole moments and non-adiabatic couplings among electronic excited states, to study the ultrafast photodynamics of diatomic molecules in …

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.

Radiation of "breathing" vortex electron packets in magnetic field
G. V. Zmaga, G. K. Sizykh, D. V. Grosman, Qi Meng, Liping Zou, Pengming Zhang, D. V. Karlovets
https://arxiv.org/abs/2509.21195

Radiation of "breathing" vortex electron packets in magnetic field
When a vortex electron with an orbital angular momentum (OAM) enters a magnetic field, its quantum state is described with a nonstationary Laguerre-Gaussian (NSLG) state rather than with a stationary Landau state. A key feature of these NSLG states is oscillations of the electron wave packet's root-mean-square (r.m.s.) radius, similar to betatron oscillations. Classically, such an oscillating charge distribution is expected to emit photons. This raises a critical question: does this radiation c…

Probing lepton flavor violating dark matter scenarios via astrophysical photons and positrons
Jin-Han Liang, Yi Liao, Xiao-Dong Ma
https://arxiv.org/abs/2508.05121 https://

Probing lepton flavor violating dark matter scenarios via astrophysical photons and positrons
In this Letter we explore, for the first time, the constraints on lepton flavor violating (LFV) dark matter (DM) scenarios via the astrophysical photons and positrons, including both the annihilation and decay modes, ${\tt DM(+DM)}\to e^\pm μ^\mp, e^\pm τ^\mp, μ^\pm τ^\mp$. Given the presence of LFV interactions in various DM models and the challenge of probing such interactions at terrestrial facilities, such as DM direct detection and collider experiments, indirect detection offers a uniq…

Piezomechanical scattering loss in electro-optics quantum transducers
Mai Zhang, Xin-Biao Xu, Ming Li, Jia-Qi Wang, Guang-Can Guo, Chang-Ling Zou
https://arxiv.org/abs/2509.19826

Piezomechanical scattering loss in electro-optics quantum transducers
Quantum transduction between microwave and optical photons is essential for building scalable quantum networks, with electro-optics conversion emerging as a promising approach. Recent experiments, however, observe significant quality factor degradation in superconducting microwave cavities when realizing the electro optics transducers. Here, we identify the piezomechanical scattering, where microwave photon loss through phonon radiation into substrate, as a universal dissipation mechanism in th…

Photon-starved polarimetry via functional classical shadows
Matteo Rosati, Miranda Parisi, Linda Sansoni, Eleonora Stefanutti, Andrea Chiuri, Marco Barbieri
https://arxiv.org/abs/2509.19547

Photon-starved polarimetry via functional classical shadows
Polarimetry and optical imaging techniques face challenges in photon-starved scenarios, where the low number of detected photons imposes a trade-off between image resolution, integration time, and sample sensitivity. Here we introduce a quantum-inspired method, functional classical shadows, for reconstructing a polarization profile in the low photon-flux regime. Our method harnesses correlations between neighbouring datapoints, based on the recent realisation that machine learning can estimate …

Strong spin-magnon coupling in a van der Waals magnet with tunable chiral symmetry
D. Garc\'ia-Pons, J. P\'erez-Bail\'on, C. Boix-Constant, I. G\'omez-Mu\~noz, X. del Arco, S. Ma\~nas-Valero, E. Coronado, D. Zueco, M. J. Mart\'inez-P\'erez
https://arxiv.org/abs/2508.17888

Strong spin-magnon coupling in a van der Waals magnet with tunable chiral symmetry
Quantum technologies require platforms that can coherently interface qubits with bosonic excitations. Photons have traditionally played this role in cavity quantum electrodynamics, but achieving the same goal using solid-state bosons remains challenging. Here we demonstrate strong and tunable spin-magnon coupling between molecular spin qubits and magnons in a van der Waals antiferromagnetic insulator. Using [Gd(W$_5$O$_{18}$)$_{2}$]$^{9-}$ as the spin ensemble and CrSBr as the magnonic resonato…

C60 fullerene as an on-demand single photon source at room temperature
Raul Lahoz Sanz, Lidia Lozano Mart\'in, Adri\`a Br\'u i Cort\'es, Sergi Hern\'andez, Mart\'i Duocastella, Jos\'e M. G\'omez-Cama, Bruno Juli\'a-D\'iaz
https://arxiv.org/abs/2508.17824

C60 fullerene as an on-demand single photon source at room temperature
Single photon sources are fundamental for applications in quantum computing, secure communication, and sensing, as they enable the generation of individual photons and ensure strict control over photon number statistics. However, current single photon sources can be limited by a lack of robustness, difficulty of integration into existing optical or electronic devices, and high cost. In this study, we present the use of off-the-shelf \ch{C60} fullerene molecules embedded in polystyrene as room-t…

Dark Higgs-strahlung at Belle II: A distinctive dark sector signature with displaced vertices and missing energy
Francesca Acanfora, Felix Kahlhoefer
https://arxiv.org/abs/2508.09247

Dark Higgs-strahlung at Belle II: A distinctive dark sector signature with displaced vertices and missing energy
Dark photons with kinetic mixing are compelling mediators for the interactions between dark matter and Standard Model particles. While most experimental searches focus on fully visible or fully invisible decays of dark photons, we explore processes that involve dark Higgs-strahlung, i.e. the emission of a dark Higgs boson connected to the mass generation of the dark photon. If the dark Higgs boson is the lightest dark sector particle, it is expected to be long-lived and decay into Standard Mode…

Beam-splitter-free, high-rate quantum key distribution inspired by intrinsic quantum mechanical spatial randomness of entangled photons
Ayan Kumar Nai, Gopal Prasad Sahu, Rutuj Gharate, C. M. Chandrashekar, G. K. Samanta
https://arxiv.org/abs/2509.10231

Beam-splitter-free, high-rate quantum key distribution inspired by intrinsic quantum mechanical spatial randomness of entangled photons
Quantum key distribution (QKD) using entangled photon sources (EPS) is a cornerstone of secure communication. Despite rapid advances in QKD, conventional protocols still employ beam splitters (BSs) for passive random basis selection. However, BSs intrinsically suffer from photon loss, imperfect splitting ratios, and polarization dependence, limiting the key rate, increasing the quantum bit error rate (QBER), and constraining scalability, particularly over long distances. By contrast, EPSs based…

Selective excitation of a single rare-earth ion in an optical fiber
Kaito Shimizu, Kazutaka Katsumata, Ayumu Rikuta, Tsuyoshi Kanemoto, Kei Sakai, Tomo Osada, Kaoru Sanaka
https://arxiv.org/abs/2508.17650

Selective excitation of a single rare-earth ion in an optical fiber
Fiber-coupled single-photon source is an essential component for the implementation of optical quantum communication technologies. Using the rare-earth ion doped in an optical fiber as an emitter is a significant method to construct such photon source at room temperature, as well as achieving high coupling and channeling efficiency. In this study, we experimentally demonstrated the generation of single photons at room temperature by selectively exciting a sole rare-earth ion isolated within a t…

A vapor-cavity-QED system for quantum computation and communication
Sharoon Austin, Dhruv Devulapalli, Khoi Hoang, Feng Zhou, Kartik Srinivasan, Alexey V. Gorshkov
https://arxiv.org/abs/2509.19432

A vapor-cavity-QED system for quantum computation and communication
In this work, we propose performing key operations in quantum computation and communication using room-temperature atoms moving across a grid of high-quality-factor, small-mode-volume cavities. These cavities enable high-cooperativity interactions with single atoms to be achieved with a characteristic timescale much shorter than the atomic transit time, allowing multiple coherent operations to take place. We study scenarios where we can drive a Raman transition to generate photons with specific…

Simple explanation of apparent Bell nonlocality of unentangled photons
Antoni W\'ojcik, Jan W\'ojcik
https://arxiv.org/abs/2509.03127 https://arxiv…

Simple explanation of apparent Bell nonlocality of unentangled photons
Wang et al. [Science Advances, 1 Aug 2025 Vol 11, Issue 31] recently reported an experiment that they interpret as demonstrating a violation of Bell's inequality using unentangled photons. Such a claim is highly controversial, since it is well established that product states cannot surpass the bounds set by local hidden variable models. In this manuscript, we analyze the essential features of the experiment through simplified, idealized scenarios. Our analysis shows that the apparent violation …

Parallel Architecture of a Frequency Comb Qudit Quantum Processor
Duncan L. MacFarlane, Hiva Shahoei, Murphy V. Paul, R. Mason Tuller, Mitchell A. Thornton
https://arxiv.org/abs/2508.15981

Parallel Architecture of a Frequency Comb Qudit Quantum Processor
Quantum optical frequency combs provide an intriguing approach to high-dimensional quantum states. Because of the need to move probabilities among different colors, the realization of gates appropriate to multicolor photons requires nonlinear or electro-optic mixing. This paper describes a novel architecture for such gates. The parallel arrangement of mixers by dimension allows graceful scaling beyond two-dimensional qubits. The parallelism of the implementation simplifies the programming of th…

There is no ultrastrong coupling with photons
Diego Fern\'andez de la Pradilla, Esteban Moreno, Johannes Feist
https://arxiv.org/abs/2508.00702 https://

There is no ultrastrong coupling with photons
Theoretical accounts of ultrastrongly coupled light-matter systems commonly assume that it arises from the interaction of an emitter with propagating photon modes supported by a structure, understanding photons as the excitations of the transverse electromagnetic field. This description discards the Coulomb interaction between the emitter and structure charges. Here, we show with a general argument based on electromagnetic constraints that the emitter-photon coupling strength is fundamentally l…

Time-resolved certification of frequency-bin entanglement over multi-mode channels
St\'ephane Vinet, Marco Clementi, Marcello Bacchi, Yujie Zhang, Massimo Giacomin, Luke Neal, Paolo Villoresi, Matteo Galli, Daniele Bajoni, Thomas Jennewein
https://arxiv.org/abs/2508.10200

Time-resolved certification of frequency-bin entanglement over multi-mode channels
Frequency-bin entangled photons can be efficiently produced on-chip which offers a scalable, robust and low-footprint platform for quantum communication, particularly well-suited for resource-constrained settings such as mobile or satellite-based systems. However, analyzing such entangled states typically requires active and lossy components, limiting scalability and multi-mode compatibility. We demonstrate a novel technique for processing frequency-encoded photons using linear interferometry a…

Bose's Probabilistic Interactions, Einstein's Objections, and Their Legacy in Quantum Optics and Stochastic Mechanics
Partha Ghose
https://arxiv.org/abs/2509.15686 https…

Bose's Probabilistic Interactions, Einstein's Objections, and Their Legacy in Quantum Optics and Stochastic Mechanics
In 1924, S. N. Bose proposed (i) a new counting method for photons and (ii) a probabilistic law of microscopic matter-radiation interactions, treating emission and absorption as two aspects of a single, field-dependent process. While Einstein enthusiastically extended Bose's counting to material particles, he sharply criticized the probabilistic law, invoking detailed balance and the correspondence principle. This paper argues that (i) once one distinguishes encounter probabilities from transit…

Effects of time dependence in the second order coherence of pulsed light
Joscelyn van der Veen, Daniel James
https://arxiv.org/abs/2509.16090 https://arxiv…

Effects of time dependence in the second order coherence of pulsed light
For light in a single temporal mode, the time dependence is associated entirely with the deterministic pulse shape rather than the quantum state. This means the second order coherence of light can no longer be understood as the temporal distribution of photons. We calculate the distribution of photon arrival time differences for pulsed light and find that it is inherently strongly bunched in terms of photocount arrival time differences. We further show how to account for the pulse shape when de…

Integrated Telecom Wavelength Heralded Single-Photon Source based on GHz gated detectors
Maria Ana Pereira, Mingsong Wu, Arslan Sajid Raja, Rui Ning Wang, Tobias Kippenberg, Hugo Zbinden, Tiff Brydges, Rob Thew
https://arxiv.org/abs/2509.16049

Integrated Telecom Wavelength Heralded Single-Photon Source based on GHz gated detectors
We introduce a simple and flexible concept for a heralded -- spectrally pure -- single photon source. The scheme uses a probabilistic photon pair source pumped with a CW laser, whereby a rapid gating InGaAs/InP single photon avalanche diode provides a synchronous clock and temporally resolves, and hence spectrally filters, the heralded photons. We demonstrate the concept by combining this with a narrow-band integrated silicon nitride photon-pair source. This simple architecture is capable of he…

Orbital angular momentum of entangled photons as a probe for relativistic effects
Fazilah Nothlawala, Kiki Dekkers, Moslem Mahdavifar, Jonathan Leach, Andrew Forbes, Isaac Nape
https://arxiv.org/abs/2508.01716

Orbital angular momentum of entangled photons as a probe for relativistic effects
Orbital angular momentum (OAM) as both classical and quantum states of light has proven essential in numerous applications, from high-capacity information transfer to enhanced precision and accuracy in metrology. Here, we extend OAM metrology to relativistic scenarios to determine the Lorentz factor of a moving reference frame, exploiting the fact that OAM is not Lorentz invariant. Using OAM correlations of entangled states, we show that their joint OAM spectrum is modified by length contractio…

Proposal for High-Dimensional Entanglement Swapping with Linear Optics and Ancillary Photons
Baghdasar Baghdasaryan, Kaushik Joarder, Fabian Steinlechner
https://arxiv.org/abs/2509.02817

Proposal for High-Dimensional Entanglement Swapping with Linear Optics and Ancillary Photons
Quantum teleportation and entanglement swapping are fundamental building blocks for realizing global quantum networks. Both protocols have been extensively studied and experimentally demonstrated using two-dimensional qubit systems. Their implementation in high-dimensional (HD) systems offers significant advantages, such as enhanced noise resilience, greater robustness against eavesdropping, and increased information capacity. Generally, HD photonic entanglement swapping requires ancilla photon…

Coherent Control of Quantum-Dot Spins with Cyclic Optical Transitions
Zhe Xian Koong, Urs Haeusler, Jan M. Kaspari, Christian Schimpf, Benyam Dejen, Ahmed M. Hassanen, Daniel Graham, Ailton J. Garcia Jr., Melina Peter, Edmund Clarke, Maxime Hugues, Armando Rastelli, Doris E. Reiter, Mete Atat\"ure, Dorian A. Gangloff
https://arxiv.org…

Coherent Control of Quantum-Dot Spins with Cyclic Optical Transitions
Solid-state spins are promising as interfaces from stationary qubits to single photons for quantum communication technologies. Semiconductor quantum dots have excellent optical coherence, exhibit near unity collection efficiencies when coupled to photonic structures, and possess long-lived spins for quantum memory. However, the incompatibility of performing optical spin control and single-shot readout simultaneously has been a challenge faced by almost all solid-state emitters. To overcome this…