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CPT INVARIANCE TESTS IN NEUTRAL KAON DECAY

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Chinese Physics C 2016年第10期40卷 707-709页

作者： M. Antonelli LNF-infn, Frascati LNF-infn Frascati infn sezione di Napoli

CPT theorem is based on three assumptions： quantum field theory, locality, and Lorentz invariance, and thus it is a fundamental probe of our basic understanding of particle physics. Strangeness oscillation in K^0 -K^... 详细信息

关键词： CPT定理介子衰变 Lorentz 中性测试变性量子场论粒子物理

Energy and Heat Fluctuations in a Temperature Quench

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Communications in Theoretical Physics 2014年第10期61卷 555-570页

作者： M.Zannetti F.Corberi G.Gonnella A.Piscitelli dipartimento di Fisica "E.Caianiello" and CNISMUnità di SalernoUniversità di Salernovia Giovanni Paolo II 13284084 Fisciano (SA)Italy Kavli Institute for Theoretical Physics China the Chinese Academy of Sciences dipartimento di Fisica Università di Bari and INFNSezione di Barivia Amendola 17370126 BariItaly division of Physical Sciences School of Physical and Mathematical SciencesNanyang Technological University21 Nanyang Link637371Singapore

Fluctuations of energy and heat are investigated during the relaxation following the instantaneous temperature quench of an extended system. Results are obtained analytically for the Gaussian model and for the large N model quenched below the critical temperature TC. The main finding is that fluctuations exceeding a critical threshold do condense. Though driven by a mechanism similar to that of Bose–Einstein condensation, this phenomenon is an out-of-equilibrium feature produced by the breaking of energy equipartition occurring in the transient regime. The dynamical nature of the transition is illustrated by phase diagrams extending in the time direction.

关键词： fluctuations condensation temperature quench relaxation equipartition breaking

A Lattice Boltzmann Study of Phase Separation in Liquid-Vapor Systems with Gravity

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Communications in Computational Physics 2010年第2期7卷 350-361页

作者： Artur Cristea Giuseppe Gonnella Antonio Lamura Victor Sofonea Center for Fundamental and Advanced Technical Research Romanian AcademyBd.Mihai Viteazul 24300223 Timi¸soaraRomania dipartimento di Fisica Universita di Bari and INFNSezione di BariVia Amendola 17370126 BariItaly Istituto Applicazioni Calcolo CNRVia Amendola 122/D70126 BariItaly

Phase separation of a two-dimensional van der Waals fluid subject to a grav-itational force is studied by numerical simulations based on lattice Boltzmann methodsimplemented with a finite difference scheme. A growth e... 详细信息

关键词： Lattice Boltzmann phase separation liquid-vapor gravity

The Brueckner-Hartree-Fock Equation of State for Nuclear Matter and Neutron Skin

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Chinese Physics Letters 2016年第3期33卷 20-23页

作者：卜庆阳李增花 Hans-Josef Schulze Institute of Modern Physics Fudan University Applied Ion Beam Physics Laboratory(Ministry of Eduction) Fudan University infn sezione di Catania

The equation of state for nuclear matter is presented within the Brueckner Hartree-Fock （BHF） scheme, by using the realistic Argonne VI8 or Bonn B two-nucleon potentials plus their corresponding microscopic three-nucleon forces. It is then applied to calculate the properties of finite nuclei within a simple liquid-drop model, and we compare the calculated volume, surface, and Coulomb parameters with the empirical ones from the liquid drop model. Nuclear density distributions and charge radii in good agreement with the experimental data are obtained~ and we predict the neutron skin thickness of various nuclei.

关键词： for on of The Brueckner-Hartree-Fock Equation of State for Nuclear Matter and Neutron Skin BHF is been EOS that

Phase Contrast Micro-Computed Tomography of Biological Sample at SSRF

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Tsinghua Science and Technology 2010年第1期15卷 102-107页

作者：陈荣昌谢红兰 Luigi Rigon 杜国浩 Edoardo Castelli 肖体乔 Shanghai Institute of Applied Physics Chinese Academy of Sciences Department of Physics University of Trieste infn Sezione di Trieste

In line X-ray phase contrast micro-computed tomography （IL-XPCT）, which can be implemented at third generation synchrotron radiation sources or by using a micro-focus X-ray tube, is a powerful technique for non-destructive, high-resolution investigations of a broad variety of materials. At the Shanghai Synchrotron Radiation Facility （SSRF）, the X-ray Imaging and Biomedical Applications Beamline was built and started regular user operation in May 2009. Both qualitative （without phase retrieval） and quantitative （with phase retrieval） three-dimensional IL-XPCT experimental techniques have been established at the beamline IL-XPCT experiments of a test sample （plastic pipes） used to evaluate the technique, and of a biological sample （locust） at the beamline are reported. Two series of images, qualitative and quantitative, including tomographic slices and three-dimensional rendering images were obtained. In qualitative images, there is a strong edge-enhancement which leads to very clear sample contours, while in quantitative images, the edge-enhancement fades but quantitative measurement of sample＇s phase information could be achieved. The experiments demonstrate that the combination of qualitative and quantitative images is useful for biological sample studies.

关键词： X-ray phase contrast tomography phase retrieval synchrotron radiation

Effects of a kaonic meson on the ground-state properties of nuclei

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Chinese Physics C 2022年第6期46卷 183-191页

作者：郭静陈登辉周先荣陈启博 H-J.Schulze Department of Physics East China Normal UniversityShanghai 200241China infn sezione di Catania Dipartimento di FisicaUniversita di CataniaVia Santa Sofia 6495123 CataniaItaly

The effects of an additional K-meson on the ground-state properties of nuclei are investigated within an axially-deformed Skyrme-Hartree-Fock approach combined with a Skyrme-type kaon-nucleon interaction.The K-meson increases the binding energies of all nuclei,whereas it affects deformations only for light nuclei without shell closure.The nucleon drip lines are modified due to the strongly attractive K-N interaction.This is attributed to the behavior of the highest-occupied nucleon single-particle levels near the drip lines,which is analyzed in detail.

关键词： kaonic nuclei drip line Skyrme-Hartree-Fock approach

A multi-wavelength study of the gravitational lens COSMOS J095930+023427

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Research in Astronomy and Astrophysics 2013年第1期13卷 15-27页

作者： Shuo Cao Giovanni Covone Maurizio Paolillo Zong-Hong Zhu Department of Astronomy Beijing Normal University dipartimento di Scienze Fisiche Universita` di Napoli "Federico II" Complesso Universitario di Monte S.Angelo infn Sezione di NapoliComplesso Universitario di Monte S.Angelo

We present a multi-wavelength study of the gravitational lens COSMOS J095930＋023427 （Zl = 0.892）, together with the associated galaxy group along the line of sight located at z 0.7, and the lensed background galaxy. The source redshift is currently unknown, but estimated to be at zs ~ 2. This analysis is based on publicly available HST, Subaru and Chandra imaging data, as well as VLT spectroscopy. The lensing system is an early-type galaxy showing a strong [OII] emission line, and pro- duces four bright images of the distant background source. It has an Einstein radius of 0.79＂, about four times larger than the effective radius. We perform a lensing anal- ysis using both a singular isothermal ellipsoid and a peudo-isothermal elliptical mass distribution for the lensing galaxy, and find that the final results on the total mass, the dark matter （DM） fraction within the Einstein radius and the external shear due to a foreground galaxy group are robust with respect to the choice of the parametric model and the source redshift （yet unknown）. We measure the luminous mass from the pho- tometric data, and find the DM fraction within the Einstein radius fDM to be between 0.71 ~ 0.13 and 0.79 ~ 0.15, depending on the unknown source redshift. Meanwhile, the non-null external shear found in our lensing models supports the presence and structure of a galaxy group at z ~ 0.7, and an independent measurement of the 0.5- 2 keV X-ray luminosity within 20＂ around the X-ray centroid provides a group mass of M = （3 - 10） x 1013 Mo, in good agreement with the previous estimate derived through weak lensing analysis. Finally, by inverting the HST/ACS/814 image with the lensing equation, we obtain the reconstructed image of the magnified source galaxy, which has a scale of about 3.3 kpc at z~ = 2 （2.7 kpc at zs = 4） and the typical disturbed disk-like appearance observed in low-mass star-forming galaxies at z ~ 3. However, deep, spatially resolved spectroscopic data for similar lensed sources are still required to detect the first stage

关键词： galaxies： individual （COSMOS J095930＋023427） -- gravitational lens-ing -- dark matter

FORM FACTORS FOR RAdiATIVE PION AND KAON DECAYS

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Chinese Physics C 2016年第10期40卷 685-686页

作者： M. Bychkov G. D'Ambrosio University of Virginia infn sezione di Napoli

The radiative decays, π^± → l^±vγ and K^± →l^±vγ, with 1 standing for an e or a μ, and γ for a real or virtual photon （e＋e- pair）, provide a powerful tool to investigate the hadronic structure of pions and kaons. The structuredependent part Sdi of the amplitude describes the emission of photons from virtual hadronic states, and is parametrized in terms of form factors V,A, （vector, axial vector）,

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Orbital angular momentum based intra- and interparticle entangled states generated via a quantum dot source

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先进光子学(英文) 2023年第4期5卷 74-84页

作者： Alessia Suprano Danilo Zia Mathias Pont Taira Giordani Giovanni Rodari Mauro Valeri Bruno Piccirillo Gonzalo Carvacho Nicolo Spagnolo Pascale Senellart Lorenzo Marrucci Fabio Sciarrino Sapienza Universitàdi Roma Dipartimento di FisicaRomaItaly Universite Paris-Saclay UMR 9001Centre for Nanosciences and NanotechnologyCNRSPalaiseauFrance Universitàdi Napoli Federico II Complesso Universitario di Monte Sant’AngeloDipartimento di Fisica“Ettore Pancini”NapoliItaly infn-sezione di Napoli NapoliItaly

Engineering single-photon states endowed with orbital angular momentum (OAM) is a powerful toolfor quantum information photonic implementations. Indeed, due to its unbounded nature, OAM is suitable forencoding qudits, allowing a single carrier to transport a large amount of information. Most of the experimentalplatforms employ spontaneous parametric down-conversion processes to generate single photons, evenif this approach is intrinsically probabilistic, leading to scalability issues for an increasing number of qudits.Semiconductor quantum dots (QDs) have been used to get over these limitations by producing on-demand pure and indistinguishable single-photon states, although only recently they have been exploitedto create OAM modes. Our work employs a bright QD single-photon source to generate a complete set ofquantum states for information processing with OAM-endowed photons. We first study hybrid intraparticleentanglement between OAM and polarization degrees of freedom of a single photon whose preparationwas certified by means of Hong–Ou–Mandel visibility. Then, we investigate hybrid interparticle OAM-based entanglement by exploiting a probabilistic entangling gate. The performance of our approach isassessed by performing quantum state tomography and violating Bell inequalities. Our results pave theway for the use of deterministic sources for the on-demand generation of photonic high-dimensionalquantum states.

关键词： orbital angular momentum quantum dot intraparticle entanglement interparticle entanglement Bell violation