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Exploring nonstandard Hbb¯ interactions at future electron-proton colliders

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Physical Review D 2024年第9期109卷 095023-095023页

作者： Gholamhossein Haghighat Reza Jafari Hamzeh Khanpour Mojtaba Mohammadi Najafabadi School of Particles and Accelerators Institute for Research in Fundamental Sciences (IPM) P.O. Box 19395-5531 Tehran Iran Department of Physics University of Tehran North Karegar Avenue Tehran 14395-547 Iran AGH University Faculty of Physics and Applied Computer Science Al. Mickiewicza 30 30-055 Kraków Poland Department of Physics University of Science and Technology of Mazandaran P.O. Box 48518-78195 Behshahr Iran

In this paper, we use the charged-current Higgs boson production process at future electron-proton colliders, e−p→Hjνe, with the subsequent decay of the Higgs boson into a bb¯ pair, to probe the Standard Model effective field theory with dimension-six operators involving the Higgs boson and the bottom quark. The study is performed for two proposed future high-energy electron-proton colliders, the Large Hadron Electron Collider (LHeC) and the Future Circular Collider (FCC-he) at the center-of-mass energies of 1.3 TeV and 3.46 TeV, respectively. Constraints on the CP-even and CP-odd Hbb¯ couplings are derived by analyzing the simulated signal and background samples. A realistic detector simulation is performed and a multivariate technique using the gradient boosted decision trees algorithm is employed to discriminate the signal from background. Expected limits are obtained at 95% confidence level for the LHeC and FCC-he assuming the integrated luminosities of 1, 2 and 10 ab−1. We find that using 1 ab−1 of data, the CP-even and CP-odd Hbb¯ couplings can be constrained with accuracies of the order of 10−3 and 10−2, respectively, and a significant region of the unprobed parameter space becomes accessible.

关键词： Effective field theory Higgs bosons Lepton-hadron colliders

DOLD COEFFICIENTS OF QUASI-UNIPOTENT HOMEOMORPHISMS OF ORIENTABLE SURFACES

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arXiv 2024年

作者： Graff, Grzegorz Marzantowicz, Waclaw Michalak, Lukasz Patryk Faculty of Applied Physics and Mathematics Gdańsk University of Technology Narutowicza 11/12 Gdańsk80-233 Poland Faculty of Mathematics and Computer Science Adam Mickiewicz University of Poznań ul. Uniwersytetu Poznańskiego 4 Poznań61-614 Poland Institute of Mathematics Physics and Mechanics Jadranska 19 LjubljanaSI-1000 Slovenia

The sequence of Dold coefficients (an(f))n of a self-map f: X → X forms a dual sequence to the sequence of Lefschetz numbers (L(fn))n of iterations of f under the Möbius inversion formula. The set AP(f) = {n: an(f) 6= 0} is called the set of algebraic periods of f. Both the set of algebraic periods and sequence of Dold coefficients play an important role in dynamical system and periodic point theory. In this work we provide a description of surface homeomorphisms with bounded (L(fn))n (quasi-unipotent maps) in terms of Dold coefficients. We also discuss the problem of minimization of the genus of a surface for which one can realize a given set of natural numbers as the set of algebraic periods. Finally, we compute and list all possible Dold coefficients and algebraic periods for a given orientable surface with small genus and give some geometrical applications of the obtained *** Codes Primary: 37C25, Secondary: 55M20, 37E30, 37D15 Copyright © 2024, The Authors. All rights reserved.

关键词： Algebra

Rényi Entropy of Zeta-Urns

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arXiv 2023年

作者： Bialas, Piotr Burda, Zdzislaw Johnston, Desmond A. Institute of Applied Computer Science Jagiellonian University ul. Lojasiewicza 11 Kraków30-348 Poland AGH University of Krakow Faculty of Physics and Applied Computer Science al. Mickiewicza 30 Kraków30-059 Poland School of Mathematical and Computer Sciences Heriot-Watt University Riccarton EdinburghEH14 4AS United Kingdom

We calculate analytically the Rényi entropy for the zeta-urn model with a Gibbs measure definition of the micro-state probabilities. This allows us to obtain the singularities in the Rényi entropy from those of the thermodynamic potential, which is directly related to the free energy density of the model. We enumerate the various possible behaviours of the Rényi entropy and its singularities, which depend on both the value of the power law in the zeta-urn and the order of the Rényi entropy under consideration. © 2023, CC BY.

关键词： Free energy

Effect of Mg Deficiency on the Thermoelectric Properties of Mg2(Si, Sn) Solid Solutions

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SSRN

SSRN 2023年

作者： Byeon, Seokyeong Wiendlocha, Bartlomiej de Boor, Johannes Nielsch, Kornelius Jin, Hyungyu Korea Republic of AGH University of Science and Technology Faculty of Physics and Applied Computer Science al. A. Mickiewicza 30 Krakow30-059 Poland KölnD-51147 Germany Leibniz Institute for Solid State and Materials Science Dresden01069 Germany Institute of Materials Science TU Dresden Dresden01062 Germany Institute of Applied Physics TU Dresden Dresden01062 Germany

Here we report a detailed analysis of the change in the thermoelectric properties of a Mg x (Si, Sn) system under variation of the nominal Mg content x (x = 1.8, 1.9, 2.1, 2.2, 2.3). Additional investigations were carried out to elucidate the mechanism by which Mg-deficient conditions induce point defects such as Mg vacancies and anion anti-site defects, and how these defects govern the thermoelectric properties of a Mg x (Si, Sn) system. We find that unmixing was induced by Mg deficiency, allowing the thermoelectric transport properties of the Mg x (Si, Sn) system to support the band gap reduction of the system. Temperature dependent measurement of the Seebeck coefficient and the Hall coefficient show that Mg-deficiency induces p-type behavior;this is further backed up by an analysis of the transport properties using a single parabolic band (SPB) model at low temperature and a simple two band model at high temperatures. The p-type conduction in the Mg-deficient system suggested that the predominant defects were Mg vacancies. However, the efficiency of p-type doping was much lower (~ 1018 cm-3) than expected when considering only Mg vacancies as origin of charge carriers. . Density functional theory (DFT) calculations suggest the anion anti-site defect on the Mg site as a reason for the low measured carrier concentration and low doping efficiency. Moreover, it is shown that the energy band structure of the Mg deficient Mgx(Si, Sn) system undergoes significant deformation and the formation of an impurity band at the X point as a result of the Mg-deficient conditions, allowing the system to have a relatively anion-rich condition. Furthermore, the Mg deficiency minimize the thermal conductivity with a range of 1 ~ 1.5 W/m∙K at room temperature due to an early bipolar contribution and separated structural phases. The presented study provides a new control parameter that can be utilized to enhance the p-type thermoelectric performance of Mg silicides. © 2023, The Authors

关键词： Phase separation

On Random Allocation Models in the Thermodynamic Limit

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arXiv 2023年

We discuss the phase transition and critical exponents in the random allocation model (urn model) for different statistical ensembles. We provide a unified presentation of the statistical properties of the model in the thermodynamic limit, uncover new relationships between the thermodynamic potentials and fill some lacunae in previous results on the singularities of these potentials at the critical point and behaviour in the thermodynamic limit. The presentation is intended to be self-contained, so we carefully derive all formulae step by step throughout. Additionally, we comment on a quasi-probabilistic normalisation of configuration weights which has been considered in some recent studies. © 2023, CC BY.

关键词： Phase transitions

Theoretical and Numerical Investigation of Acoustic Cavitation Bubble Based on the Impact of Ultrasound Frequency

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Bulletin of the Russian Academy of sciences: physics 2023年第Suppl 3期87卷 S341-S347页

作者： Ahmed K. Abu-Nab Abu-Bakr, Ali F. Zain Abu Shaeer Department of Mathematics and Computer Science Faculty of Science Menoufia University Shebin El-Koom32511 Egypt Phystech School of Applied Mathematics and Informatics Moscow Institute of Physics and Technology Moscow oblast Dolgoprudny141700 Russia Department of Basic Science Higher Institute of Engineering and Technology Kafr El Sheikh33511 Egypt

Abstract: Acoustic cavitation is the expansion and contraction of existing microbubbles in liquids brought on by an ultrasonic field. The dynamics of oscillations at higher pressures and temperatures when the cavitation bubbles collapse can be used to characterize cavitation dynamical behavior. This work deals with the theoretical and numerical investigation of acoustic cavitation in viscoelastic media considering the influence of ultrasound frequency. An acoustic pressure equation combined with a modified Rayleigh–Plesset equation forms the theoretical framework for ultrasound cavitation dynamics. The numerical solutions of the given cavitation bubble model were obtained taking into account the effect of acoustic pressure, using the exponential B-Spline collection method. The dynamics of the cavitation bubbles’ radius and the internal pressure of acoustic cavitation were examined at different values of viscosity and the impact of physical parameters on the monatomic, diatomic, and adiabatic gas-filled spherical bubble’s collapse dynamics for (k = 7/5, 5/3, 1) respectively. © Pleiades Publishing, Ltd. 2023. ISSN 1062-8738, Bulletin of the Russian Academy of sciences: physics, 2023, Vol. 87, Suppl. 3, pp. S341–S347. Pleiades Publishing, Ltd., 2023. ISSN 1062-8738, Bulletin of the Russian Academy of sciences: physics, 2023. Pleiades Publishing, Ltd., 2023.

关键词： Dynamics

Partition function zeros of zeta-urns

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arXiv 2023年

作者： Bialas, P. Burda, Z. Johnston, D.A. Institute of Applied Computer Science Jagiellonian University ul. Lojasiewicza 11 Kraków30-348 Poland AGH University of Krakow Faculty of Physics and Applied Computer Science al. Mickiewicza 30 Kraków30-059 Poland School of Mathematical and Computer Sciences Heriot-Watt University Riccarton EdinburghEH14 4AS United Kingdom

We discuss the distribution of partition function zeros for the grand-canonical ensemble of the zeta-urn model, where tuning a single parameter can give a first or any higher order condensation transition. We compute the locus of zeros for finite-size systems and test scaling relations describing the accumulation of zeros near the critical point against theoretical predictions for both the first and higher order transition regimes. © 2023, CC BY.

关键词： Relativity

Transmon probe for quantum characteristics of magnons in antiferromagnets

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Physical Review B 2023年第9期108卷 094430-094430页

作者： Vahid Azimi-Mousolou Anders Bergman Anna Delin Olle Eriksson Manuel Pereiro Danny Thonig Erik Sjöqvist Department of Applied Mathematics and Computer Science Faculty of Mathematics and Statistics University of Isfahan Isfahan 81746-73441 Iran Department of Physics and Astronomy Uppsala University Box 516 SE-751 20 Uppsala Sweden Department of Applied Physics School of Engineering Sciences KTH Royal Institute of Technology AlbaNova University Center SE-10691 Stockholm Sweden Swedish e-Science Research Center (SeRC) KTH Royal Institute of Technology SE-10044 Stockholm Sweden School of Science and Technology Örebro University SE-701 82 Örebro Sweden

The detection of magnons and their quantum properties, especially in antiferromagnetic (AFM) materials, is a substantial step to realize many ambitious advances in the study of nanomagnetism and the development of energy efficient quantum technologies. The recent development of hybrid systems based on superconducting circuits provides the possibility to engineer quantum sensors that exploit different degrees of freedom. Here, we examine the magnon-photon-transmon hybridization based on bipartite AFM materials, which gives rise to an effective coupling between a transmon qubit and magnons in a bipartite AFM. We demonstrate how magnon modes, their chiralities, and quantum properties, such as nonlocality and two-mode magnon entanglement in bipartite AFMs, can be characterized through the Rabi frequency of the superconducting transmon qubit.

关键词： Magnons Quantum correlations in quantum information Quantum entanglement Quantum metrology Photons Superconducting qubits

High Efficiency and Optically Transparent 2D-MoS2 Heaters for Silicon Photonics

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High Efficiency and Optically Transparent 2D-MoS2 Heaters fo...

Conference on Lasers and Electro-Optics (CLEO)

作者： Dor Oz Nathan Suleymanov Boris Minkovich Vladislav Kostianovskii Liron Gantz Dmitry Polyushkin Thomas Mueller Ilya Goykhman The Faculty of Science and The Center for Nanoscience and Nanotechnology Institute of Applied Physics The Hebrew University of Jerusalem Jerusalem Israel Department of Electrical and Computer Engineering Technion Haifa Israel NVIDIA Israel LTD Yokneam Israel Institute of Photonics Vienna University of Technology Vienna Austria

We experimentally demonstrate the first 1L-MoS2 microheater integrated with a silicon MRR, showing the best-reported power efficiency of ~7.5 mW/n with no significant penalty on insertion loss when placed close to the... 详细信息

ISBN: (纸本)9798350369311

关键词： Optical losses Heating systems Optical resonators Insertion loss Lasers and electrooptics Silicon photonics Electro-optical waveguides