Tootfinder

Testing strong-field QED with the avalanche precursor
A. A. Mironov, S. S. Bulanov, A. Di Piazza, M. Grech, L. Lancia, S. Meuren, J. Palastro, C. Riconda, H. G. Rinderknecht, P. Tzeferacos, G. Gregori
https://arxiv.org/abs/2506.02832

Testing strong-field QED with the avalanche precursor
A two-beam high-power laser facility is essential for the study of one of the most captivating phenomena predicted by strong-field quantum electrodynamics (QED) and yet unobserved experimentally: the avalanche-type cascade. In such a cascade, the energy of intense laser light can be efficiently transformed into high-energy radiation and electron-positron pairs. The future 50-petawatt-scale laser facility NSF OPAL will provide unique opportunities for studying such strong-field QED effects, as i…

Cavity QED with molecular defects coupled to to a photonic crystal cavity
Christian M. Lange, Arya D. Keni, Ishita Agarwal, Emma Daggett, Adhyyan S. Mansukhani, Ankit Kundu, Benjamin Cerjan, Libai Huang, Jonathan D. Hood
https://arxiv.org/abs/2506.01917

Cavity QED with molecular defects coupled to to a photonic crystal cavity
We implement permanent spectral tuning to bring lifetime-limited emitters into collective resonance within an integrated photonic cavity. This addresses a fundamental challenge in solid-state cavity QED: combining multiple coherent quantum emitters with scalable nanophotonics. Our hybrid approach decouples emitter synthesis from nanophotonic fabrication using straightforward techniques that make cavity QED broadly accessible. High doping densities allow us to couple several coherent emitters to…

Influence of a Perfectly Conducting Plate on the Uehling Potential of QED
Thales Azevedo, Fabricio A. Barone, Carlos Farina, Reinaldo de Melo e Souza, Gabriel Zarpelon
https://arxiv.org/abs/2506.00243

Influence of a Perfectly Conducting Plate on the Uehling Potential of QED
In this work, we investigate the influence of a perfectly conducting plate on the Uehling potential of Quantum Electrodynamics (QED), corresponding to the first loop correction to the classical Coulomb potential in that situation. We use the method of images adapted to the photon propagator, extending the method beyond the standard (classical) tree level calculation. We show that the effect of the plate on the quantum correction is much stronger than the expectation from a naive application of …

Static Electric Dipole Polarizability and Hyperpolarizability Tensors from Mean-Field Cavity Quantum Electrodynamics Approaches
A. Eugene DePrince III, Stephen H. Yuwono
https://arxiv.org/abs/2506.00217

Static Electric Dipole Polarizability and Hyperpolarizability Tensors from Mean-Field Cavity Quantum Electrodynamics Approaches
First-order electric dipole response functions are implemented for cavity quantum electrodynamics (QED) generalizations of Hartree-Fock (HF) and Kohn-Sham density functional theory (DFT) in order to assess the degree to which static molecular response properties are impacted by interactions between electronic degrees of freedom and an optical cavity mode. Isotropically averaged static electric dipole polarizability tensors from QED-HF and QED-DFT are found to be somewhat insensitive to the pres…

This https://arxiv.org/abs/2412.09398 has been replaced.
initial toot: https://mastoxiv.page/@a…

Anomalous pinch in electron-electron beam collision
We show that an anomalous pinch can occur in ultrarelativistic electron-electron or positron-positron beam interaction, caused by the combined interplay of collective beam motion (disruption) and strong-field quantum electrodynamics (SF-QED). The locally created electron-positron pairs, from SF-QED effects, screen the self-fields of the beams and can invert the polarity of the Lorentz force resulting in a pinch of the beams. A theoretical model predicts the pinch condition and is confirmed by f…

Investigating QED Effects on the Thin Accretion Disk Properties Around Rotating Euler-Heisenberg Black Holes
Kourosh Nozari, Sara Saghafi, Fatemeh Aliyan
https://arxiv.org/abs/2506.17986

Investigating QED Effects on the Thin Accretion Disk Properties Around Rotating Euler-Heisenberg Black Holes
The Einstein Euler Heisenberg (EEH) black hole model represents an extension of classical black hole solutions in general relativity by incorporating quantum electrodynamic (QED) corrections. These corrections are introduced through the inclusion of the Euler-Heisenberg Lagrangian, which accounts for the nonlinear effects of QED in the presence of strong electromagnetic fields. This study investigates the observational properties of a thin accretion disk surrounding the electrically charged rot…

This https://arxiv.org/abs/2407.15109 has been replaced.
initial toot: https://mastoxiv.page/@a…

Entangled Photon-Pair Emission in Waveguide Circuit QED from a Cooper Pair Splitter
As a waveguide circuit QED architecture, we investigate theoretically the single-photon pair emission of a Cooper pair splitter composed of two double quantum dots, each coupled to a microwave transmission line. We find that this system can generate frequency-entangled photon pairs in the left and right transmission lines, specifically a superposition of two photon wave packets at different frequencies. The frequency entanglement of the two photons arises from the particle-hole coherent superpo…

Dissipation engineering of fermionic long-range order beyond Lindblad
Silvia Neri, Fran\c{c}ois Damanet, Andrew J. Daley, Marialuisa Chiofalo, Jorga Yago Malo
https://arxiv.org/abs/2507.00553

Dissipation engineering of fermionic long-range order beyond Lindblad
We investigate the possibility of engineering dissipatively long-range order that is robust against heating in strongly interacting fermionic systems, relevant for atoms in cavity QED. It was previously shown [Tindall et al. Phys.Rev.Lett. 123, 030603 (2019)] that it is possible to stabilize long-range order in a Hubbard model by exploiting a dissipative mechanism in the Lindblad limit, this latter being valid for spectrally unstructured baths. Here, we first show that this mechanism still hold…

Ambiguities in the generation of CFJ-terms in a 5-dimensional extension of QED in one loop
H. G. Fargnoli, J. C. C. Felipe, G. Gazzola
https://arxiv.org/abs/2506.20961

Ambiguities in the generation of CFJ-terms in a 5-dimensional extension of QED in one loop
In this paper, we investigate a Lorentz symmetry breaking extension of Quantum Electrodynamics (QED), incorporating 5-dimensional CPT-odd terms at the one-loop level. Employing an independent regularization method, we systematically separate the divergences into regularization-independent contributions and regularization-dependent (surface terms). We demonstrate that these surface terms, potentially contributing to the radiative generation of Carroll-Field-Jackiw (CFJ) terms, remain undetermine…

High-Precision Quantum Dynamics of He$_2$ b $^3\Pi_\mathrm{g}$-c $^3\Sigma_\mathrm{g}^ $ including Non-adiabatic, Relativistic and QED Corrections and Couplings
Bal\'azs R\'acsai, P\'eter Jeszenszki, \'Ad\'am Marg\'ocsy, Edit M\'atyus
https://arxiv.org/abs/2506.23879

High-Precision Quantum Dynamics of He$_2$ b $^3Π_\mathrm{g}$-c $^3Σ_\mathrm{g}^+$ including Non-adiabatic, Relativistic and QED Corrections and Couplings
Relativistic, quantum electrodynamics, as well as non-adiabatic corrections and couplings, are computed for the b $^3Π_\mathrm{g}$ and c $^3Σ_\mathrm{g}^+$ electronic states of the helium dimer. The underlying Born-Oppenheimer potential energy curves are converged to 1 ppm ($1:10^6$) relative precision using a variational explicitly correlated Gaussian approach. % The quantum nuclear motion is computed over the b $^3Π_\mathrm{g}$-c $^3Σ_\mathrm{g}^+$ (and B $^1Π_\mathrm{g}$-C $^1Σ_\mathrm…

Miami-based Payabli, which provides software companies with an embedded payments platform, raised a $28M Series B led by Fika Ventures and QED Investors (Ryan Lawler/Axios)
https://www.axios.com/pro/fintech-deals/2025/06/17/payabli-28-millio…

Exclusive: Payabli raises $28M to scale embedded payments
Payments are becoming a core strategy for software vendors.

A Determination of $\alpha_s(m_Z)$ at aN$^3$LO$_{\bf QCD}\otimes {\bf NLO}_{\bf QED}$ Accuracy from a Global PDF Analysis
The NNPDF Collaboration, Richard D. Ball, Andrea Barontini, Juan Cruz-Martinez, Stefano Forte, Felix Hekhorn, Emanuele R. Nocera, Juan Rojo, Roy Stegeman
https://arxiv.org/abs/2506.13871

A Determination of $α_s(m_Z)$ at aN$^3$LO$_{\bf QCD}\otimes {\bf NLO}_{\bf QED}$ Accuracy from a Global PDF Analysis
We present a determination of the strong coupling $α_s(m_Z)$ from a global dataset including both fixed-target and collider data from deep-inelastic scattering and a variety of hadronic processes, with a simultaneous determination of parton distribution functions (PDFs) based on the NNPDF4.0 methodology. This determination is performed at NNLO and approximate N$^3$LO (aN$^3$LO) perturbative QCD accuracy, including QED corrections and a photon PDF up to NLO accuracy. We extract $α_s$ using two…

Probing Strong-Field QED via Angle-Discriminated Emissions from Electrons Traversing Colliding Laser Pulses
C. Olofsson, A. Gonoskov
https://arxiv.org/abs/2506.08741

Probing Strong-Field QED via Angle-Discriminated Emissions from Electrons Traversing Colliding Laser Pulses
Future laser-electron colliders will reach quantum parameters $χ$ well in excess of unity, enabling studies of strong-field QED in extreme regimes. However, statistical inference in such experiments requires mitigating premature radiative losses of electrons to enable high-$χ$ QED events, as well as separating the detectable signal of these events from that of lower-$χ$ particles and photons produced by QED cascades. We propose a collider geometry in which electrons traverse the waist of two…

Multi-Target Density Matrix Renormalization Group X algorithm and its application to circuit quantum electrodynamics
Sof\'ia Gonz\'alez-Garc\'ia, Aaron Szasz, Alice Pagano, Dvir Kafri, Guifr\'e Vidal, Agustin Di Paolo
https://arxiv.org/abs/2506.24109

Multi-Target Density Matrix Renormalization Group X algorithm and its application to circuit quantum electrodynamics
Obtaining accurate representations of the eigenstates of an array of coupled superconducting qubits is a crucial step in the design of circuit quantum electrodynamics (QED)-based quantum processors. However, exact diagonalization of the device Hamiltonian is challenging for system sizes beyond tens of qubits. Here, we employ a variant of the density matrix renormalization group (DMRG) algorithm, DMRG-X, to efficiently obtain localized eigenstates of a 2D transmon array without the need to first…

Comparing QCD QED via full simulation versus the RM123 method: U-spin window contribution to $a_\mu^{\mathrm{HVP}}$
A. Altherr, I. Campos, A. Cotellucci, R. Gruber, T. Harris, J. Komijani, F. Margari, M. K. Marinkovic, L. Parato, A. Patella, S. Rosso, N. Tantalo, P. Tavella
https://arxiv.org/abs/2506.19770

Comparing QCD+QED via full simulation versus the RM123 method: U-spin window contribution to $a_μ^{\mathrm{HVP}}$
Electromagnetic corrections to hadronic vacuum polarization contribute significantly to the uncertainty of the Standard Model prediction of the muon anomaly, which poses conceptual and numerical challenges for ab initio lattice determinations. In this study, we compute the non-singlet contribution from intermediate Euclidean current separations in quantum chromo- and electrodynamics (QCD+QED) using C* boundary conditions in two ways: either non-perturbatively by sampling the joint probability d…

(1) A sheet of paper is an ink-lined plane.
(2) An inclined plane is a slope up.
(3) A slow pup is a lazy dog.
QED: A sheet of paper is a lazy dog.
-- Willard Espy, "An Almanac of Words at Play"

A scanning resonator for probing quantum coherent devices
Jared Gibson, Zhanzhi Jiang, Angela Kou
https://arxiv.org/abs/2506.22620 https://

A scanning resonator for probing quantum coherent devices
Superconducting resonators with high quality factors are extremely sensitive detectors of the complex impedance of materials and devices coupled to them. This capability has been used to measure losses in multiple different materials and, in the case of circuit quantum electrodynamics (circuit QED), has been used to measure the coherent evolution of multiple different types of qubits. Here, we report on the implementation of a scanning resonator for probing quantum coherent devices. Our scannin…

Rovibrational computations for He$_2^ $ X$^ \ \Sigma_\mathrm{u}^ $ including non-adiabatic, relativistic and QED corrections
Edit M\'atyus, \'Ad\'am Marg\'ocsy
https://arxiv.org/abs/2506.19120

Rovibrational computations for He$_2^+$ X$^+\ Σ_\mathrm{u}^+$ including non-adiabatic, relativistic and QED corrections
We report the potential energy curve, the diagonal Born-Oppenheimer, non-adiabatic mass, relativistic, and leading-order QED corrections for the ground electronic state of the helium dimer cation; the higher-order QED and finite-nuclear size effects are also estimated. The computations are carried out with an improved error control and over a much broader configuration range compared to earlier work [D. Ferenc, V. I. Korobov, and E. Mátyus, Phys. Rev. Lett. 125, 213001 (2020)]. As a result, al…

From Few to Many Emitters Cavity QED: Energy Levels and Emission Spectra From Weak to Deep-Strong Coupling
Andrea Zappal\'a, Alberto Mercurio, Daniele Lamberto, Samuel Napoli, Omar Di Stefano, Salvatore Savasta
https://arxiv.org/abs/2506.18763

From Few to Many Emitters Cavity QED: Energy Levels and Emission Spectra From Weak to Deep-Strong Coupling
We present a systematic study of the properties of systems composed of $N$ two-level quantum emitters coupled to a single cavity mode, for light-matter interaction strengths ranging from the weak to the ultrastrong and deep-strong coupling regimes. Beginning with an analysis of the energy spectrum as a function of the light-matter coupling strength, we examine systems with varying numbers of emitters, from a pair to large collections, approaching the thermodynamic limit ($N \to \infty$). Additi…

Rovibrational computations for the He$_2$ a $^3\Sigma_\mathrm{u}^ $ state including non-adiabatic, relativistic, and QED corrections
\'Ad\'am Marg\'ocsy, Bal\'azs R\'acsai, P\'eter Jeszenszki, Edit M\'atyus
https://arxiv.org/abs/2506.19116

Rovibrational computations for the He$_2$ a $^3Σ_\mathrm{u}^+$ state including non-adiabatic, relativistic, and QED corrections
A potential energy curve (PEC) accurate to a fraction of 1 ppm ($1:10^6$) is computed for the $^3Σ_\mathrm{u}^+$ state of He$_2$ endowed with relativistic and QED corrections. The nuclear Schrödinger equation is solved on this PEC with diagonal Born-Oppenheimer and non-adiabatic mass corrections to obtain highly accurate rotational-vibrational levels. The computed rovibrational intervals and fine-structure splittings, spanning over several orders of magnitude in energy, are found to be in rem…

Infrared Divergence in QED and the Fluctuation of Electromagnetic Fields
Takeshi Fukuyama
https://arxiv.org/abs/2506.08269 https://ar…

Infrared Divergence in QED and the Fluctuation of Electromagnetic Fields
We reconsider the well known infrared divergence (IRD) in QED from the various graphs and relate with the electromagnetic fluctuation etc. based on the Fock space formalism. It may be useful for discriminating it from the alternative approach based on the dressed asymptotic space.

Physics of Strong Magnetism with eXTP
Mingyu Ge, Long Ji, Roberto Taverna, Sergey Tsygankov, Yanjun Xu, Andrea Santangelo, Silvia Zane, Shuang-Nan Zhang, Hua Feng, Wei Chen, Quan Cheng, Xian Hou, Matteo Imbrogno, Gian Luca Israel, Ruth Kelly, Ling-Da Kong, Kuan Liu, Alexander Mushtukov, Juri Poutanen, Valery Suleimanov, Lian Tao, Hao Tong, Roberto Turolla, Weihua Wang, Wentao Ye, Qing-Chang Zhao, Jinjun Geng, Lin Lin, Wei-Yang Wang, Fei Xie, Shao-Lin Xiong, Shu Zhang, Yucong Fu, Dong L…

Physics of Strong Magnetism with eXTP
In this paper we present the science potential of the enhanced X-ray Timing and Polarimetry (eXTP) mission, in its new configuration, for studies of strongly magnetized compact objects. We discuss the scientific potential of eXTP for QED studies, especially leveraging on the recent observations made with the NASA IXPE mission. Given eXTP's unique combination of timing, spectroscopy, and polarimetry, we focus on the perspectives for physics and astrophysics studies of strongly magnetized compact…

Towards a hybrid 3D transmon qubit with topological insulator-based Josephson junctions
Sheng-Wen Huang, Ramya Suresh, Jian Liao, Botao Du, Zachary Miles, Leonid P. Rokhinson, Yong P. Chen, Ruichao Ma
https://arxiv.org/abs/2506.18232

Towards a hybrid 3D transmon qubit with topological insulator-based Josephson junctions
Superconducting quantum circuits provide a versatile platform for studying quantum materials by leveraging precise microwave control and utilizing the tools of circuit quantum electrodynamics (QED). Hybrid circuit devices incorporating novel quantum materials could also lead to new qubit functionalities, such as gate tunability and noise resilience. Here, we report experimental progress towards a transmon-like qubit made with a superconductor-topological insulator-superconductor (S-TI-S) Joseph…

Precision phenomenology at multi-TeV muon colliders
Stefano Frixione, Fabio Maltoni, Davide Pagani, Marco Zaro
https://arxiv.org/abs/2506.10733 https://

Precision phenomenology at multi-TeV muon colliders
Future lepton colliders, such as those based on linear $e^+e^-$ or circular $μ^+μ^-$ accelerators, are expected to attain centre-of-mass energies in the multi-TeV range. In this regime the impact of QED and of weak radiation, in both the initial and the final state, can become a leading effect. By employing a general framework presented in a companion paper - suitable for any flavour of colliding leptons - we improve next-to-leading order electroweak predictions by including higher-order cont…

Replaced article(s) found for hep-th. https://arxiv.org/list/hep-th/new
[1/2]:
Weather Forecast for Vacuum Fluctuations in QED
https://

Double neutral-current corrections to NLO electroweak leptonic cross sections
Stefano Frixione, Fabio Maltoni, Davide Pagani, Marco Zaro
https://arxiv.org/abs/2506.10732

Double neutral-current corrections to NLO electroweak leptonic cross sections
We present a method for improving next-to-leading order electroweak (EW) predictions for lepton-scattering processes by consistently including double neutral-current corrections arising from vector-boson-fusion topologies, which are formally of higher order. By combining, in a process-independent manner, exact fixed-order results, collinear resummation of QED radiation, and a subtraction procedure, we obtain results which are gauge invariant and valid in the entire phase space, retain any depen…

A cavity array microscope for parallel single-atom interfacing
Adam L. Shaw, Anna Soper, Danial Shadmany, Aishwarya Kumar, Lukas Palm, Da-Yeon Koh, Vassilios Kaxiras, Lavanya Taneja, Matt Jaffe, David I. Schuster, Jonathan Simon
https://arxiv.org/abs/2506.10919

A cavity array microscope for parallel single-atom interfacing
Neutral atom arrays and optical cavity QED systems have developed in parallel as central pillars of modern experimental quantum science. While each platform has demonstrated exceptional capabilities-such as high-fidelity quantum logic in atom arrays, and strong light-matter coupling in cavities-their combination holds promise for realizing fast and non-destructive atom measurement, building large-scale quantum networks, and engineering hybrid atom-photon Hamiltonians. However, to date, experime…

Spontaneous emission and Purcell effect: some aspects
P. P. Abrantes, D. Szilard, C. Farina
https://arxiv.org/abs/2506.10210 https://…

Spontaneous emission and Purcell effect: some aspects
This chapter, part of the Proceedings of the III International Workshop on Quantum Nonstationary Systems (eds. Alexandre Dodonov and Lucas Chibebe Celeri), held in Brasilia in August 2024, offers a comprehensive overview of spontaneous emission (SE) and the Purcell effect within the broader context of quantum electrodynamics (QED) and vacuum fluctuations. It begins with a historical and theoretical review, tracing the development of classical and quantum electromagnetic theories. The chapter th…

Optically accessible high-finesse millimeter-wave resonator for cavity quantum electrodynamics with atom arrays
Tony Zhang, Michelle Wu, Sam R. Cohen, Lin Xin, Debadri Das, Kevin K. S. Multani, Nolan Peard, Anne-Marie Valente-Feliciano, Paul B. Welander, Amir H. Safavi-Naeini, Emilio A. Nanni, Monika Schleier-Smith
https://arxiv…

Optically accessible high-finesse millimeter-wave resonator for cavity quantum electrodynamics with atom arrays
Cavity quantum electrodynamics (QED) is a powerful tool in quantum science, enabling preparation of non-classical states of light and scalable entanglement of many atoms coupled to a single field mode. While the most coherent atom-photon interactions have been achieved using superconducting millimeter-wave cavities coupled to Rydberg atoms, these platforms so far lack the optical access required for trapping and addressing individual atomic qubits. We present a millimeter-wave Fabry-Pérot cavi…