Tootfinder

Probing Light Dark Matter with Cosmic Gravitational Focusing
Shao-Feng Ge, Liang Tan
https://arxiv.org/abs/2509.21213 https://arxiv.org/pdf/2509.21213

Probing Light Dark Matter with Cosmic Gravitational Focusing
We investigate the possibility of using the cosmic gravitational focusing (CGF) to probe the minor light dark matter (DM) component whose mass is in the range of $(0.1 \sim 100)$\,eV. Being a purely gravitational effect, the CGF offers a mode-independent probe that is complementary to the existing ways such as Lyman-$α$ and $ΔN_{\rm eff}$. Such effect finally leads to a dipole density distribution that would affect the galaxy formation and hence can be reconstructed with galaxy surveys such a…

Characterizing bright $\delta$ Scuti pulsators using TESS lightcurves
Prasad Mani, Timothy R. Bedding, Mara Bernizzoni, Simon J. Murphy, Daniel Hey
https://arxiv.org/abs/2508.18589

Characterizing bright $δ$ Scuti pulsators using TESS lightcurves
We present a study of bright, young $δ$ Scuti stars near the zero-age main sequence using TESS light curves and Gaia DR3 data. From a sample of 2041 stars with G<7 and $G_{BP}-G_{RP}$ colour in the range 0-0.6, we identified 444 $δ$ Scuti pulsators. We measured a pulsator fraction of ~70% in the middle of the instability strip, tapering off towards the edges. A period - luminosity diagram reveals a concentration along the fundamental mode and overtone ridges. We addressed sample completeness …

#LibreOffice Writer follows the dark/light mode on Gnome. That is awesome!

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…

Spatial-mode demultiplexing for quantum-inspired superresolution experiments
Nickolay Erin Titov
https://arxiv.org/abs/2509.17115 https://arxiv.org/pdf/250…

Spatial-mode demultiplexing for quantum-inspired superresolution experiments
Conventional optical imaging is limited by diffraction, preventing discrimination of closely spaced incoherent sources. Inspired by quantum parameter estimation, this thesis explores spatial-mode demultiplexing (SPADE) as a method to overcome this limit by projecting light onto an orthonormal mode basis. In this work, we design and experimentally validate a practical implementation of spatial-mode demultiplexing via Multi-Plane Light Conversion (MPLC).

Crank-rocker optical fiber mode scrambler prototype for the GMT-Consortium Large Earth Finder (G-CLEF)
Matthew C. H. Leung, Colby Jurgenson, Andrew Szentgyorgyi, William Podgorski, Mark Mueller, Yahel Sofer Rimalt, Joseph Zajac, Cem Onyuksel, Daniel Durusky, Peter Doherty
https://arxiv.org/abs/2509.18306

I guess it's a good first step https://toot.cafe/@tomayac/115309411832537447
But I've also been waiting for *years* (`prefers-color-scheme` was introduced in 2019), for:
- light/dark-mode `theme_color`
- light/dark-mode `background_color`
- light-dark-mode `ic…

Nonperturbative quantum field theory for pseudo-Goldstone modes, slow-Goldstone modes, and their quantum chaos
Fadi Sun, Jinwu Ye
https://arxiv.org/abs/2508.14491 https://

Nonperturbative quantum field theory for pseudo-Goldstone modes, slow-Goldstone modes, and their quantum chaos
In this work, we develop a novel form of non-perturbative theory to identify a light pseudo-Goldstone mode with a small mass, as well as a new type of Goldstone mode with a tiny slope (termed the slow-Goldstone mode), which may not be obtained via traditional perturbative methods. We demonstrate our formalism in the context of superfluids formed by Rashba spin-orbit coupled spinor bosons in a square lattice weakly interacting with a spin-anisotropic interaction. The experimental detections of t…

Dynamical neutron-star tides: The signature of a mode resonance
P. Pnigouras, N. Andersson, F. Gittins, A. R. Counsell
https://arxiv.org/abs/2508.06416 https://

Dynamical neutron-star tides: The signature of a mode resonance
Motivated by future opportunities in gravitational-wave astronomy and the ongoing effort to constrain physics under extreme conditions, we consider the signature of individual mode resonances excited during the inspiral of binary systems involving neutron stars. Specifically, we quantify how each resonant mode contributes to the effective (frequency-dependent) tidal deformability. The resonant solution is shown to be accurately represented by a new closed-form approximation, which sheds light o…

Inverse-Designed Photonic Crystal Cavities with Controllable Far-Field Numerical Aperture
Neelesh Kumar Vij, Purbita Purkayastha, Jasvith Raj Basani, Edo Waks
https://arxiv.org/abs/2509.16827

Inverse-Designed Photonic Crystal Cavities with Controllable Far-Field Numerical Aperture
Photonic crystal cavities confine light to subwavelength volumes, enabling strong light-matter interactions for applications in low-power photonics, opto-electronics, nonlinear optics, and quantum information. These applications demand cavities that combine high quality factors, low mode volumes, and high coupling efficiencies. However, optimizing across these metrics requires exploring a large design space, motivating the use of inverse design strategies. Previous inverse design efforts target…

Chern insulators and topological flat bands in cavity-embedded kagome systems
Hikaru Goto, Ryo Okugawa, Takami Tohyama
https://arxiv.org/abs/2510.09150 https://

Chern insulators and topological flat bands in cavity-embedded kagome systems
We investigate topological band structures of a kagome system coupled to a circularly polarized cavity mode, using a model based on a muffin-tin potential and quantum light-matter interaction. We show that Chern insulating phases emerge in the cavity-embedded kagome system due to the light-matter interaction that breaks time-reversal symmetry. We also find that a nearly flat band can be topologically nontrivial with a nonzero Chern number. By varying the light-matter interaction, we also reveal…

Coherence and Dimensionality Witnesses for Fractional OAM Modes
A. L. S. Santos Junior, I. Prego, M. Gil de Oliveira, A. C. Barbosa, B. P. da Silva, D. J. Brod, E. F. Galv\~ao, A. Z. Khoury
https://arxiv.org/abs/2509.13275

Coherence and Dimensionality Witnesses for Fractional OAM Modes
We characterize sets of fractional orbital angular momentum (OAM) modes of a light beam using unitary-invariant properties encoded by two-mode overlaps. Using basis-independent coherence and dimension witnesses, we experimentally certify, on a triple of fractional modes, both the presence of coherence and that the states necessarily span a space of dimension 3. We propose and implement a practical, fast experimental method to extract two-mode overlaps requiring only a single intensity image per…

Selective excitation of molecular vibrations via a two-mode cavity Raman scheme
Lucas Borges, Thomas Schnappinger, Markus Kowalewski
https://arxiv.org/abs/2509.07753 https://

Selective excitation of molecular vibrations via a two-mode cavity Raman scheme
The experimental realization of strong light-matter coupling with molecules initiated the rapidly evolving field of molecular polaritonics. Most studies focus on how exciton polaritons, which combine electronic excitations with confined light modes, alter photochemistry. In this paper, we investigate their use in selectively exciting molecular vibrational states in the ground state. Selectively exciting molecules to high vibrational states with infrared lasers to catalyze ground-state chemical …

Glass transition in colloidal monolayers controlled by light-induced caging
Abolfazl Ahmadirahmat, Michele Caraglio, Vincent Krakoviack, Thomas Franosch
https://arxiv.org/abs/2509.07726

Glass transition in colloidal monolayers controlled by light-induced caging
We theoretically investigate the glass-transition problem for a quasi-two-dimensional colloidal dense suspension modulated by a one-dimensional periodic external potential as imposed by interfering laser beams. Relying on a mode-coupling approach, we examine the nonequilibrium state diagram for hard disks as a function of the density and the period of the modulation for various potential strengths. The competition between the local packing and the distortion of the cages induced by the potentia…

Single atom enables extraordinary light transmission through zero-mode waveguide
Vasily Klimov
https://arxiv.org/abs/2508.21514 https://arxiv.org/pdf/2508.…

Single atom enables extraordinary light transmission through zero-mode waveguide
In this work, we develop a theory of light transmission through a Zero-Mode Waveguide (ZMW) containing a single atom. It is shown that the presence of a single atom inside the ZMW can lead to either a significant enhancement or suppression of light transmission, depending on the detuning of the excitation field frequency from the atomic resonance. This extraordinary transmission and blocking effect can be employed for studying the spatiotemporal dynamics of atoms in complex nanoscopic environme…

Searching for a Charged Higgs Boson in Top-Quark Decays via the $WZ$ Mode
Saiyad Ashanujjaman, Andreas Crivellin, Siddharth P. Maharathy, Bruce Mellado
https://arxiv.org/abs/2509.07094

Searching for a Charged Higgs Boson in Top-Quark Decays via the $WZ$ Mode
Top-quark decays are sensitive probes of light charged Higgs bosons ($H^\pm$) due to the sizable $t\bar t$ production cross section at the LHC in conjunction with their distinct experimental signatures. While dedicated ATLAS and CMS searches considered only $H^\pm$ decays into $τν$, $cs$, or $cb$ for $m_{H^\pm}

Search for a photon peak from keV-scale dark matter annihilation with NuSTAR: Constraints on $\langle \sigma v \rangle$ after 11 years of observations
E. I. Zakharov, V. V. Barinov, D. S. Gorbunov, R. A. Krivonos, A. A. Mukhin
https://arxiv.org/abs/2509.08506

Search for a photon peak from keV-scale dark matter annihilation with NuSTAR: Constraints on $\langle σv \rangle$ after 11 years of observations
We report new constraints on the velocity-independent annihilation cross section $\langle σv \rangle$ of keV-scale dark matter particles based on 11 years of observations with the NuSTAR X-ray telescope. Using the unfocused stray light mode of the instrument, which provides a wide field-of-view and a stable instrumental background, we perform a sensitive search for photon signatures from dark matter annihilation in the Galactic halo. We model the resulting diffuse X-ray spectrum over the 3-20 …

The R-index: A universal metric for evaluating OAM content and mode purity in optical fields
Monika Bahl, Georgios M. Koutentakis, Mikhail Maslov, Tom Jungnickel, Timo Gassen, Mikhail Lemeshko, Oliver H. Heckl
https://arxiv.org/abs/2508.12973

The R-index: A universal metric for evaluating OAM content and mode purity in optical fields
Despite its pivotal role in optical manipulation, high-capacity communications, and quantum information, a general measure of orbital angular momentum (OAM) in structured light remains elusive. In optical fields, where multiple vortices coexist, the local nature of vortex OAM and the absence of a common rotation axis make the total OAM of the field difficult to quantify. Here, we introduce the R-index, a metric that captures the intrinsic OAM content of any structured optical field, from pure L…

Multiparameter quantum metrology at Heisenberg scaling for an arbitrary two-channel linear interferometer with squeezed light
Atmadev Rai, Danilo Triggiani, Paolo Facchi, Vincenzo Tamma
https://arxiv.org/abs/2509.07574

Multiparameter quantum metrology at Heisenberg scaling for an arbitrary two-channel linear interferometer with squeezed light
We present a framework for simultaneously estimating all four real parameters of a general two-channel unitary U(2) with Heisenberg-scaling precision. We derive analytical expressions for the quantum Fisher information matrix and show that all parameters attain the 1/N scaling in the precision by using experimentally feasible Gaussian probes such as two-mode squeezed states or two single-mode squeezed states. Our results extend multiparameter metrology to its most general two-mode setting and e…

Focal-plane wavefront sensing with moderately broadband light using a short multi-mode fiber
Auxiliadora Padr\'on-Brito, Natalia Arteaga-Marrero, Ian Cunnyngham, Jeff Kuhn
https://arxiv.org/abs/2510.03058

Focal-plane wavefront sensing with moderately broadband light using a short multi-mode fiber
We propose a focal-plane wavefront sensor (FPWFS) based on a short multimode fiber (MMF) capable of operating under moderately broadband illumination. By coupling the aberrated focal-plane field into an MMF of length <1 cm, we preserve modal interference over a 10 nm bandwidth at near-infrared wavelengths. The resulting output intensity pattern encodes pupil phase information, enabling wavefront recovery via a neural network. Our approach resolves the inherent sign ambiguity of even pupil-phase…

Floquet Theory of lattice electrons coupled to an off-resonant cavity
Jules Sueiro, Gian Marcello Andolina, Marco Schir\`o
https://arxiv.org/abs/2507.22715 https://

Floquet Theory of lattice electrons coupled to an off-resonant cavity
We use Floquet theory and the High-Frequency expansion to derive an effective Hamiltonian for electrons coupled to an off resonant cavity mode, either in its vacuum or driven by classical light. For vacuum fields, we show that long-range hopping and cavity-mediated interactions arise as a direct consequence of quantum fluctuations. As an application, this method is applied to the Su-Schrieffer-Heeger (SSH) model. At high light-matter coupling, our results reveal significant deviations from mean…

The optical photometric variability of Herbig Ae/Be stars from TESS
Ann Marie Cody, Lynne A. Hillenbrand, Shreya Chandragiri, Marvin Morgan
https://arxiv.org/abs/2510.08633 http…

The optical photometric variability of Herbig Ae/Be stars from TESS
We have carried out a photometric time domain study of 188 intermediate-mass young stars observed in Full Frame Image mode with the TESS satellite over the first 3.3 years of its mission. The majority of these targets are classified as Herbig Ae/Be stars (HAeBes). All were monitored at optical wavelengths for at least one 27-day TESS sector, with many having multiple sectors of data. From a custom aperture photometry pipeline, we produced light curves and analyzed the variability therein, as a …

Ultrafast optical modulation of vibrational strong coupling in ReCl(CO)$_3$(2,2-bipyridine)
Liying Chen, Alexander M. McKillop, Ashley P. Fidler, Marissa L. Weichman
https://arxiv.org/abs/2509.11439

Ultrafast optical modulation of vibrational strong coupling in ReCl(CO)$_3$(2,2-bipyridine)
Polaritons - hybrid light-matter states formed from the strong coupling of a bright molecular transition with a confined photonic mode - may offer new opportunities for optical control of molecular behavior. Vibrational strong coupling (VSC) has been reported to impact ground-state chemical reactivity, but its influence on electronic excited-state dynamics remains unexplored. Here, we take a first step towards excited-state VSC by demonstrating optical modulation of the ReCl(CO)$_3$(bpy), (bpy …

Efficient Third-Harmonic Generation via Strong Coupling of Quasi-Guided Modes
Xin Huang, Qi Lin, Sheng-Xuan Xia, Xiang Zhai, Gui-Dong Liu
https://arxiv.org/abs/2508.14514 https:…

Efficient Third-Harmonic Generation via Strong Coupling of Quasi-Guided Modes
Improving the conversion efficiency is critical for advancing nonlinear photonic devices, enabling applications in ultrafast optics, quantum light sources, and high-resolution imaging. Herein, we present a bilayer waveguide integrated with a periodic square nanocube array to enhance third-harmonic generation (THG) efficiency. This structure achieves strong coupling between TE- and TM-polarized quasi-guided mode (QGM) resonances, thereby enabling simultaneous dynamic control of both resonant Q-f…

Quantitative Nonlinear Optical Polarimetry with High Spatial Resolution
Albert Suceava, Sankalpa Hazra, Jadupati Nag, John Hayden, Safdar Imam, Zhiwen Liu, Abishek Iyer, Mercouri Kanatzidis, Susan Trolier-McKinstry, Jon-Paul Maria, Venkatraman Gopalan
https://arxiv.org/abs/2507.23050

Quantitative Nonlinear Optical Polarimetry with High Spatial Resolution
Nonlinear optical microscopy such as in the optical second-harmonic generation (SHG) modality has become a popular tool today for probing materials in the physical and biological sciences. While imaging and spectroscopy are widely used in the microscopy mode, nonlinear polarimetry, which can shed light on materials' symmetry and microstructure, is relatively underdeveloped. This is partly because quantitative analytical modeling of the optical SHG response for anisotropic crystals and films lar…

End-to-End Complexity Analysis for Quantum Simulation of the Extended Jaynes-Cummings Models
Nam Nguyen, Michael Yu, Alan Robertson, Hiromichi Nishimura, Samuel J. Elman, Benjamin Koltenbah
https://arxiv.org/abs/2509.13546

End-to-End Complexity Analysis for Quantum Simulation of the Extended Jaynes-Cummings Models
The extended Jaynes-Cummings model (eJCM) is a foundational framework for describing multi-mode light-matter interactions, with direct applications in quantum technologies such as photon addition and quasi-noiseless amplification. However, the model's complexity makes classical simulation intractable for large systems that could be of practical interest. In this work, we present a comprehensive, end-to-end framework for the quantum simulation of the eJCM. We develop explicit quantum algorithms …

Unconventional Materials for Light Dark Matter Detection
Yonit Hochberg, Dino Novko, Rotem Ovadia, Antonio Politano
https://arxiv.org/abs/2507.07164 https://

Unconventional Materials for Light Dark Matter Detection
We propose the use of several unconventional materials as detectors for dark matter with mass beneath the MeV scale. These include the transition-metal dichalcogenide TiSe$_2$ hosting a low-energy plasmon in the charge-density-wave phase, Sr$_2$RuO$_4$ containing a low-energy acoustic demon mode, and hole-doped diamond with tunable optical and acoustic plasmon frequencies. We perform first-principles density functional theory computations of their loss functions at non-vanishing momenta and est…

Close encounters between periodic light and periodic arrays of quantum emitters
Frieder Lindel, Carlos J. S\'anchez Mart\'inez, Johannes Feist, Francisco J. Garc\'ia-Vidal
https://arxiv.org/abs/2508.00797

Close encounters between periodic light and periodic arrays of quantum emitters
Periodically structured surfaces (metasurfaces), i.e., periodic light, have evolved as a powerful tool for manipulating electromagnetic fields both in classical and quantum regimes. However, no general approach for quantizing the electromagnetic fields and treating quantum light-matter interactions in such structures exists. Here, we construct an ab initio few-mode quantization scheme for metasurface resonances based on macroscopic quantum electrodynamics. We use our approach to propose a frame…

Diffractive neural networks for mode-sorting with flexible detection regions
Kaden Bearne, Alexander Duplinskiy, Matthew J. Filipovich, A. I. Lvovsky
https://arxiv.org/abs/2508.20058

Diffractive neural networks for mode-sorting with flexible detection regions
Mode-sorting is a procedure that decomposes a light field into a basis of transverse modes, directing each mode into a separate spatial location, allowing the constituent mode intensities to be measured simultaneously. We demonstrate a mode-sorter based on a diffractive optical neural network and show that it is advantageous to include the output detection regions into the trainable set of parameters of that network. This approach outperforms traditional mode-sorting methods, achieving higher e…

Far-field radiation of bulk, edge and corner eigenmodes from a finite 2D Su-Schrieffer-Heeger plasmonic lattice
\'Alvaro Buend\'ia, Jos\'e Luis Pura, Vincenzo Giannini, Jos\'e Antonio S\'anchez Gil
https://arxiv.org/abs/2510.08063

Far-field radiation of bulk, edge and corner eigenmodes from a finite 2D Su-Schrieffer-Heeger plasmonic lattice
Subwavelength arrays of plasmonic nanoparticles allow us to control the behaviour of light at the nanoscale. Here, we develop an eigenmode analysis, employing a coupled electromagnetic dipole formalism, which permits us to isolate the contribution to the far-field radiation of each array mode. Specifically, we calculate the far-field radiation patterns by bulk, edge and corner out-of-plane eigenmodes in a finite 2D Su-Schrieffer-Heeger (SSH) array of plasmonic nanoparticles with out-of-plane di…

Maximum heralding probabilities of non-classical state generation from two-mode Gaussian state via photon counting measurements
Jarom\'ir Fiur\'a\v{s}ek
https://arxiv.org/abs/2510.01951

Maximum heralding probabilities of non-classical state generation from two-mode Gaussian state via photon counting measurements
Highly non-classical states of light - such as the approximate Gottesman-Kitaev-Preskill states or cat-like states - can be generated from experimentally accessible Gaussian states via photon counting measurements on selected modes, conditioned on specific outcomes of these heralding events. A simplest yet important example of this approach involves performing photon number measurements on one mode of a two-mode entangled Gaussian state. The heralding probability of this scheme is a key figure …

Unveiling the link between quantum ghost imaging and Grover's quantum searching algorithm
Neelan Gounden, Fazilah Nothlawala, Paola C. Obando, Thomas Konrad, Andrew Forbes, Isaac Nape
https://arxiv.org/abs/2508.11296

Unveiling the link between quantum ghost imaging and Grover's quantum searching algorithm
Photonic quantum technologies have become pivotal in the implementation of communication, imaging and computing modalities. Among these applications, quantum ghost imaging (GI) exploits photon correlations to surpass classical limits, with recent advances in spatial-mode encoding and phase imaging. In parallel, all-optical computing offers powerful, passive-light processing capabilities. Here, we explore the intersection of these domains, revealing a conceptual and operational link between GI a…

Phase Diagram and dynamical phases of self organization of a Bose--Einstein condensate in a transversely pumped red-detuned cavity
Julian Mayr, Maria Laura Staffini, Simon B. J\"ager, Corinna Kollath, Jonathan Keeling
https://arxiv.org/abs/2509.03445

Phase Diagram and dynamical phases of self organization of a Bose--Einstein condensate in a transversely pumped red-detuned cavity
We study a transversely pumped atomic Bose--Einstein Condensate coupled to a single-mode optical cavity, where effective atom--atom interactions are mediated by pump and cavity photons. A number of experiments and theoretical works have shown the formation of a superradiant state in this setup, where interference of pump and cavity light leads to an optical lattice in which atoms self-consistently organize. This self-organization has been extensively studied using the approximate Dicke model (t…

Synchronized Circular Motion of Optically Confined Marangoni Microswimmers
Sabera M. Borno, Robin Khisa, Israt H. Zarin, Md Hasan Mahmud, Nicholas D. Brubaker, Ryan C. Hayward, Nabila Tanjeem
https://arxiv.org/abs/2507.20517

Synchronized Circular Motion of Optically Confined Marangoni Microswimmers
Understanding the collective actuation of microscopic structures driven by external fields can lead to the development of next-generation autonomous machines. With this goal in mind, we investigated light-induced collective motion of thermocapillary microswimmers at the air-water interface. We found that Marangoni forces, which lead to long-ranged repulsive interparticle interactions, can cause microswimmers to synchronize their circular motion in a collective chase mode that resembles predator…

Topology-Optimized Dielectric Cavities for Enhanced Excitonic Light Emission from $\rm WSe_{2}$
Owen Matthiessen, Brandon Triplett, Omer Yesilyurt, Davide Cassara, Karthik Pagadala, Morris M. Yang, Andres E. Llacsahuanga Allcca, Hamza Ather, Colton Fruhling, Abhishek Bharatbhai Solanki, Yong P. Chen, Hadiseh Alaeian, Alexander V. Kildishev, Vladimir M. Shalaev, Federico Capasso, Alexandra Boltasseva, Vahagn Mkhitaryan

Topology-Optimized Dielectric Cavities for Enhanced Excitonic Light Emission from $\rm WSe_{2}$
Photonic inverse design and, especially, topology optimization, enable dielectric cavities with deeply sub-diffraction mode volumes and high quality factors, thus offering a powerful platform for enhanced light-matter coupling. Here, we design and fabricate arrays of CMOS-compatible silicon cavities on sapphire with extreme subwavelength transverse mode sizes of only 30-40 nm ($\rm V\simλ^3/2500$). These cavities are engineered for deterministic coupling to a monolayer (or few-layer) excitonic…

Electric-Magnetic-Switchable Free-Space Skyrmions in Toroidal Light Pulses via a Nonlinear Metasurface
Li Niu, Xi Feng, Xueqian Zhang, Wangke Yu, Qingwei Wang, Yuanhao Lang, Quan Xu, Xieyu Chen, Jiajun Ma, Haidi Qiu, Yijie Shen, Weili Zhang, Jiaguang Han
https://arxiv.org/abs/2508.21355

Electric-Magnetic-Switchable Free-Space Skyrmions in Toroidal Light Pulses via a Nonlinear Metasurface
Recent advances reveal that light propagation in free space supports many exotic topological textures, such as skyrmions. Their unique space-time topologies make them promising candidates as next-generation robust information carriers. Hence, the ability of switching different texture modes is highly demanded to serve as a manner of data transfer. However, previous studies focus on generation of one specific mode, lacking integrated devices with externally variable and stable mode generation ca…

Spectro-temporally tailored Non-Gaussian Quantum Operations in Thin-Film Waveguides
Peter Namdar, Patrick Folge, Carlos E. Lopetegui, Silia Babel, Benjamin Brecht, Christine Silberhorn, Valentina Parigi
https://arxiv.org/abs/2508.04578

Spectro-temporally tailored Non-Gaussian Quantum Operations in Thin-Film Waveguides
Advancements in photonic platforms have enabled the precise control of light's spectral and temporal degrees of freedom, a capability crucial for the development of scalable quantum information systems. In this work, we address the challenge of implementing spectro-temporal mode-selective non-Gaussian quantum operations, specifically single-photon subtraction (SPS) and addition (SPA), in the telecom wavelength regime. Building on prior experimental demonstrations of mode-selective near-infrared…

Programmable control of the spatiotemporal quantum noise of light
Jamison Sloan, Michael Horodynski, Shiekh Zia Uddin, Yannick Salamin, Michael Birk, Pavel Sidorenko, Ido Kaminer, Marin Solja\v{c}i\'c, Nicholas Rivera
https://arxiv.org/abs/2509.03482

Programmable control of the spatiotemporal quantum noise of light
Optoelectronic systems based on multiple modes of light can often exceed the performance of their single-mode counterparts. However, multimode nonlinear interactions often introduce considerable amounts of noise, limiting the ultimate performance of these systems. It is therefore crucial to develop ways to simultaneously control complex nonlinear interactions while also gaining control over their noise. Here, we show that noise buildup in nonlinear multimode systems can be strongly suppressed b…

Atom-Induced Field Squeezing Predicted by Magnus Expanding the Jaynes-Cummings Model for a Two-Level Atom
Phoenix M. M. Paing
https://arxiv.org/abs/2508.03506 https://

Atom-Induced Field Squeezing Predicted by Magnus Expanding the Jaynes-Cummings Model for a Two-Level Atom
By performing up to the second-order Magnus expansion on the Jaynes-Cummings Model Hamiltonian governing the interaction of a two-level atom and a single cavity mode electromagnetic field, we find the term involving the squeezing of light beyond the Rotating Wave Approximation. Our results demonstrate that the Magnus expansion provides a systematic framework to capture atom-induced squeezing effects. These findings suggest new avenues for engineering nonclassical states in simple light-matter s…

Advanced mirror shapes for mode enhancement in plano-concave cavities
William James Hughes, Peter Horak
https://arxiv.org/abs/2510.07251 https://arxiv.org/…

Advanced mirror shapes for mode enhancement in plano-concave cavities
Optical cavities are frequently used in quantum technologies to enhance light matter interactions, with applications including single photon generation and entanglement of distant emitters. The Fabry-Pérot resonator is a popular choice for its high optical access and large emitter-mirror separation. A typical configuration, particularly for emitters that should not be placed close to the mirror surface like trapped ions and Rydberg atoms, features two spherical mirrors placed around a central …

Non-Gaussian Photon Correlations in Weakly Coupled Atomic Ensembles
Yangming Wang, Sahand Mahmoodian
https://arxiv.org/abs/2509.03970 https://arxiv.org/pdf…

Non-Gaussian Photon Correlations in Weakly Coupled Atomic Ensembles
We develop a scattering theory formalism and use it to predict that a resonantly driven atomic ensemble weakly coupled to an optical mode can generate light with non-Gaussian correlations. Our approach -- based on a perturbative diagrammatic expansion of multi-photon interactions -- shows that photon-photon interaction mediated by the emitters causes the transmitted light to have a non-vanishing connected third-order correlation function $g_c^{(3)}$. We explain the temporal pattern of $g_c^{(3)…

Entanglement Assisted Non-local Optical Interferometry in a Quantum Network
P. -J. Stas, Y. -C. Wei, M. Sirotin, Y. Q. Huan, U. Yazlar, F. Abdo Arias, E. Knyazev, G. Baranes, B. Machielse, S. Grandi, D. Riedel, J. Borregaard, H. Park, M. Lon\v{c}ar, A. Suleymanzade, M. D. Lukin
https://arxiv.org/abs/2509.09464

Entanglement Assisted Non-local Optical Interferometry in a Quantum Network
The sensitivity of non-local optical measurements at low light intensities, such as those involved in long baseline telescope arrays, can be improved by using remote entanglement. Here, we demonstrate the use of entangled quantum memories in a quantum network of Silicon-vacancy centers in diamond nano-cavities to experimentally perform such non-local phase measurements. Specifically, we combine the generation of event-ready remote quantum entanglement, photon mode erasure that hides the "which-…

General model and modulation strategies for Sagnac-based encoders
Federico Berra, Mat\'ias Rub\'en Bola\~nos, Alberto De Toni, Kannan Vijayadharan, Costantino Agnesi, Marco Avesani, Andrea Stanco, Paolo Villoresi, Giuseppe Vallone
https://arxiv.org/abs/2510.11873

General model and modulation strategies for Sagnac-based encoders
In recent decades, there has been an increasing demand for faster modulation schemes. Electro-optic modulators are essential components in modern photonic systems, enabling high-speed control of light for applications ranging from telecommunications to quantum communication. Conventional inline and Mach-Zehnder modulators, while widely adopted, are limited by bias drift, high operating voltages, and polarization-mode dispersion. Sagnac loop-based modulators have recently emerged as a promising …

Beyond Stellar Rank: Control Parameters for Scalable Optical Non-Gaussian State Generation
Fumiya Hanamura, Kan Takase, Hironari Nagayoshi, Ryuhoh Ide, Warit Asavanant, Kosuke Fukui, Petr Marek, Radim Filip, Akira Furusawa
https://arxiv.org/abs/2509.06255

Beyond Stellar Rank: Control Parameters for Scalable Optical Non-Gaussian State Generation
Advanced quantum technologies rely on non-Gaussian states of light, essential for universal quantum computation, fault-tolerant error correction, and quantum sensing. Their practical realization, however, faces hurdles: simulating large multi-mode generators is computationally demanding, and benchmarks such as the \emph{stellar rank} do not capture how effectively photon detections yield useful non-Gaussianity. We address these challenges by introducing the \emph{non-Gaussian control parameters…

Control Protocol for Dynamic Synthesis of Qubit and Qudit Gates Using Photonic Pulses and Magnetic Fields
A. F. Urquijo Rodr\'iguez, Edgar A. G\'omez, H. Vinck-Posada
https://arxiv.org/abs/2509.04825

Control Protocol for Dynamic Synthesis of Qubit and Qudit Gates Using Photonic Pulses and Magnetic Fields
We propose a theoretical control protocol designed for the dynamic synthesis of single qubit and four-level qudit quantum gates using external parameters, such as photonic Gaussian pulses and magnetic fields, in a microcavity quantum well system. Our approach takes advantage of tunable coherent light matter interactions that can be modulated by the magnetic field between the exciton and negative trion coupled to the lowest photonic mode. We demonstrate that it is possible to achieve precise man…

Can a vector beam be critically coupled leading to perfect absorption?
Sauvik Roy, Nirmalya Ghosh, Ayan Banerjee, Subhasish Dutta Gupta
https://arxiv.org/abs/2510.06822 https://…

Can a vector beam be critically coupled leading to perfect absorption?
Critical coupling has emerged as a prominent area of research in recent years. However, most theoretical models are based on scalar theories (and occasionally coupled mode theories), which inadequately account for the polarization states of the incident light. To bridge this gap, we revisit the concept of critical coupling in planar multilayer structures using a full vectorial theory, where conventional plane wave illumination is replaced by well-defined vector beams with and without orbital an…

Widely non-degenerate nonlinear frequency conversion in cryogenic titanium in-diffused lithium niobate waveguides
Nina Amelie Lange, Sebastian Lengeling, Philipp Mues, Viktor Quiring, Werner Ridder, Christof Eigner, Harald Herrmann, Christine Silberhorn, Tim J. Bartley
https://arxiv.org/abs/2509.02392

Widely non-degenerate nonlinear frequency conversion in cryogenic titanium in-diffused lithium niobate waveguides
The titanium in-diffused lithium niobate waveguide platform is well-established for reliable prototyping and packaging of many quantum photonic components at room temperature. Nevertheless, compatibility with certain quantum light sources and superconducting detectors requires operation under cryogenic conditions. We characterize alterations in phase-matching and mode guiding of a non-degenerate spontaneous parametric down-conversion process emitting around 1556 nm and 950 nm, under cryogenic c…

Orbital Frontiers: Harnessing Higher Modes in Photonic Simulators
Jiho Noh, Julian Schulz, Wladimir Benalcazar, Christina J\"org
https://arxiv.org/abs/2510.04627 https://…

Orbital Frontiers: Harnessing Higher Modes in Photonic Simulators
Photonic platforms have emerged as versatile and powerful classical simulators of quantum dynamics, providing clean, controllable optical analogs of extended structured (i.e., crystalline) electronic systems. While most realizations to date have used only the fundamental mode in each site, recent advances in structured light - particularly the use of higher-order spatial modes, including those with orbital angular momentum - are enabling richer dynamics and new functionalities. These additional…

Phonon-polariton mediated dual electromagnetically induced transparency-like response in a THz metamaterial
Amit Haldar, Kshitij V Goyal, Ruturaj V Puranik, Vivek Dwij, Srijan Maity, Kanha Ram Khator, Subhashis Ghosh, Bhagwat S. Chouhan, Gagan Kumar, Satyaprasad P. Senanayak, Shriganesh Prabhu, Shovon Pal
https://arxiv.org/abs/2509.02151…

Phonon-polariton mediated dual electromagnetically induced transparency-like response in a THz metamaterial
Light and matter can intertwine to create entirely new quantum states in the so-called strong-coupling regime, allowing unprecedented control over electromagnetic waves. In this work, strong-coupling mediated polaritonic states are exploited to demonstrate tunable dual electromagnetically induced transparency (EIT) like response in the terahertz (THz) frequency range using a micron-sized metamaterial system coupled with the phonon mode of a lead halide perovskite film. This architecture allows …