Academic literature on the topic 'Moment angulaire orbital des quarks'
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Journal articles on the topic "Moment angulaire orbital des quarks"
Weng, Zi-Hua. "Spin angular momentum of proton spin puzzle in complex octonion spaces." International Journal of Geometric Methods in Modern Physics 14, no. 07 (March 16, 2017): 1750102. http://dx.doi.org/10.1142/s021988781750102x.
Full textMIRJALILI, ABOLFAZL, KIANOOSH KESHAVARZIAN, and MOHAMMAD MEHDI YAZDANPANAH. "FLAVOR AND SPIN DEPENDENT STRUCTURE OF THE NUCLEON AND MESON." International Journal of Modern Physics A 27, no. 01 (January 10, 2012): 1250003. http://dx.doi.org/10.1142/s0217751x12500030.
Full textSONG, XIAOTONG. "QUARK ORBITAL ANGULAR MOMENTUM IN THE BARYON." International Journal of Modern Physics A 16, no. 22 (September 10, 2001): 3673–97. http://dx.doi.org/10.1142/s0217751x01005018.
Full textKostenko, Boris. "Quark-Parton Model and Relativistic Quantum Mechanics." EPJ Web of Conferences 173 (2018): 02012. http://dx.doi.org/10.1051/epjconf/201817302012.
Full textLorcé, Cédric. "Quark Spin-Orbit Correlations." International Journal of Modern Physics: Conference Series 37 (January 2015): 1560036. http://dx.doi.org/10.1142/s2010194515600368.
Full textWakamatsu, Masashi. "Is gauge-invariant complete decomposition of the nucleon spin possible?" International Journal of Modern Physics A 29, no. 09 (April 8, 2014): 1430012. http://dx.doi.org/10.1142/s0217751x14300129.
Full textPruvost, Laurence, and Thierry Ruchon. "Vortex optiques en interaction avec des atomes." Reflets de la physique, no. 75 (April 2023): 10–16. http://dx.doi.org/10.1051/refdp/202375010.
Full textLiu, Keh-Fei. "Quark and Glue Components of the Proton Spin from Lattice Calculation." International Journal of Modern Physics: Conference Series 40 (January 2016): 1660005. http://dx.doi.org/10.1142/s2010194516600053.
Full textIwasaki, Sachio, Makoto Oka, Kei Suzuki, and Tetsuya Yoshida. "Hadronic Paschen-Back effect in P-wave charmonia under strong magnetic fields." International Journal of Modern Physics: Conference Series 49 (January 2019): 1960002. http://dx.doi.org/10.1142/s2010194519600024.
Full textJAFFE, ROBERT L. "OPEN QUESTIONS IN HIGH ENERGY SPIN PHYSICS." International Journal of Modern Physics A 18, no. 08 (March 30, 2003): 1141–52. http://dx.doi.org/10.1142/s0217751x03014459.
Full textDissertations / Theses on the topic "Moment angulaire orbital des quarks"
Riberdy, Michael. "Continuum QCD approaches to the 3D structure of the nucleon." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASP043.
Full textThis PhD thesis encompasses two distinct yet interrelated aspects that contribute to the understanding of quark dynamics within the nucleon structure.First Aspect: GPD Modeling via LFWFsThe study improves ways to find quark helicity projection nucleon fluctuations. It uses a representation of Generalized Parton Distributions (GPDs) with definite quark orbital angular momentum Light Front Wave Functions (LFWFs). These LFWFs are important in Fock expansions of hadronic states, and are projections of three-quark amplitudes . The 3D light cone projections of such amplitudes are used to restore a probabilistic interpretation. The three-quark nucleon amplitudes to be projected, in turn, are wave functions defined through off-diagonal nucleon matrix elements, leading to the derivation of nucleon LFWFs of various definite orbital angular momenta (OAM).With these definite quark helicity LFWFs, the study calculates GPDs as combinations of their overlaps. This approach facilitates isolation of definite OAM contributions to nucleon GPDs, Parton Distribution Functions (PDFs), Electromagnetic Form Factors (FFs), and the electric nucleon radius. The significance of this work lies in its potential to map the contributions of distinct quark OAM states to nucleon structure.Second Aspect: Bayesian Reweighting of GPD Replicas Using Mock Lattice DataA systematic study is presented to demonstrate the impact of lattice QCD data on the extraction of GPDs. To achieve this, a previously developed set of GPD models based on machine learning techniques is employed. The underlying modeling adheres to theoretical requirements, including polynomiality, a form of positivity constraint, and known limits. Special attention is given to estimate uncertainty arising from the challenging connection between GPDs and experimental processes, notably deeply virtual Compton scattering (DVCS).Mock lattice QCD data inputs are strategically included in a Bayesian framework, reducing the uncertainty associated with the models. Emphasis is placed on assessing the impact of precision, correlation, and kinematic coverage of lattice data on uncertainty reduction, particularly at moderate skewness. This allows for a connection between lattice QCD practitioners and GPD modeling by investigating the constraints on lattice data necessary for the greatest reduction of uncertainty on the modeling side of nucleon GPD physics.In summary, this PhD thesis presents a dual-focused exploration of quark dynamics within the nucleon structure. The first aspect refines GPD modeling through LFWFs, isolating quark helicity projection nucleon fluctuations and delineating the multidimensional structure of the nucleon. Complementing this, the second aspect conducts an impact study, incorporating mock lattice data to constrain prior GPD modeling by colleagues of the candidate. Utilizing a Bayesian framework, the study refines uncertainties resulting from a prior model based on Goloskov and Kroll's phenomenological approach, and in doing so elucidates possible uses of directed lattice QCD studies intended to feed GPD modeling in combination and complement to current and future experimental data
Nguyen, Duy Kevin. "Étude des ondes à Moment Angulaire Orbital pour les liaisons Radiofréquences." Toulouse 3, 2016. http://www.theses.fr/2016TOU30033.
Full textMalgré sa découverte au début du XXe siècle, le Moment Angulaire Orbital (OAM) est une propriété de l'onde encore inexploitée actuellement. Au cours des années 1990, les premières utilisations pratiques du Moment Angulaire Orbital d'une onde électromagnétique ont vu le jour dans le domaine optique. Il s'agissait alors de faisceaux collimatés ou gaussiens. Contrairement au Moment Angulaire de Spin qui ne possède que deux états orthogonaux, il existe en principe une infinité d'états pour le Moment Angulaire Orbital. On peut également exhiber pour eux des propriétés algébriques d'orthogonalité. Les récentes expériences qui mettent en oeuvre cette propriété dans le domaine des hyperfréquences ont suscité un intérêt pour ces ondes. En effet, l'utilisation du Moment Angulaire Orbital, en tant qu'élément de codage de l'information, a été récemment investiguée dans le domaine des liaisons optiques. Au sein de la communauté des télécommunications, elle laisse notamment apparaître des perspectives d'accroissement des capacités de transmission, à occupation spectrale équivalente. Nous proposons dans cette thèse l'étude des concepts fondamentaux, en appui sur l'état de l'art, pour poser les bases de la compréhension de ces ondes si particulières, également appelées vortex électromagnétiques. Malgré la très vive controverse actuelle autour de ce sujet, l'objectif de ces travaux est de dresser un premier bilan des aspects fondamentaux sur le Moment Angulaire Orbital et de statuer sur les potentialités et les limites de son utilisation. Nous avons défini deux axes d’étude pour atteindre ces objectifs. D'une part, nous apportons une contribution en approfondissant les travaux existants sur la théorie de l'estimation locale de l'ordre du Moment Angulaire Orbital. D'autre part, la problématique du bilan de liaison d'une onde porteuse de Moment Angulaire Orbital est largement étudiée. Un développement asymptotique est proposé pour aboutir à une formulation originale faisant apparaître des termes équivalents de gains et de pertes. Cette formulation, permettant de pré-dimensionner un système de communication à Moment Angulaire Orbital, est validée en simulation et expérimentalement à l'aide d'un prototype de système de communication à quatre canaux de Moment Angulaire Orbital, conçu et réalisé avec le soutien du CNES. Enfin, prenant part à un travail amont sur le Moment Angulaire Orbital, ce manuscrit s'achève sur des discussions quant aux potentialités multiples liées à cette propriété
Sanchez, Padilla Benjamin. "Rotational mechanical effects driven by the transfer of the acoustic orbital angular momentum." Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0452.
Full textWe study the rotational mechanical effects resulting from sound-matter interaction in the presence of orbital angular momentum transfer. A set of experimental realizations are implemented by using ultrasonic waves propagating in the air and 3D printed centimeter-sized objects acting as structured mirrors imparting a helical phase profile to the reflected wave. The main result consists of the quantitative direct measurement of the orbital angular momentum carried by acoustic vortex beams via two independent approaches. The first one is based on the use of a freely rotating helical mirror placed at air-water interface, and the second one relies on the development of a torsional mechanical oscillator driven by acoustic orbital angular momentum
Tandjè, Sourou Hugues Arsène. "Conception et caractérisation de fibres optiques à modes à moment angulaire orbital." Thesis, Lille 1, 2019. http://www.theses.fr/2019LIL1R032/document.
Full textOptical fibers (step index and graded-index ones) are widely used for long-haul (intercontinental, terrestrial optical backbone) and short-reach (datacenter, access network) links. Some fibers called specialty optical fibers also play an important role in other applications like medicine (endoscopy for example), sensing, laser applications etc. The constant rise of Internet services combined to the growth of the number of Internet users makes it necessary to increase the current capacity of optical fiber networks. The fibers commercially used today for very high data rate transmissions use only the fundamental mode (denoted LP01, in the weakly guiding approximation) to transmit the information: there are known as single-mode fibers. As they are now reaching the so-called nonlinear Shannon limit, one of the ideas for increasing the capacity of fiber networks is to implement space-division multiplexing (SDM) and then simultaneously use different modes in a so-called few-mode fiber (fiber supporting typically dozens of modes) or a multicore fiber. Since 2010, several studies have been developed in this direction, mainly on fibers supporting LP (Linearly Polarized) modes and more recently OAM (Orbital Angular Momentum) modes, i.e. modes with helical phase and circular polarization. In this last case, phase and polarization properties are supposed to limit the coupling between modes. This PhD work deals with the design and the realization of OAM fibers presenting weak coupling between modes, for application to data transport but also for study in nonlinear photonics. Some of the fibers studied are annular core fibers made by conventional manufacturing methods, having internal / external radii and optimized ring refractive indices. We fabricated such all-solid ring-core fibers with the aim to apply them for simple MIMO transmission using OAM modes as independent channels. However, we also designed and manufactured the first photonic crystal fiber (PCF) with close-to-circular ring-core, low confinement loss and suitable for OAM mode guidance. We experimentally show that the fabricated fibers support OAM modes, and their transmission matrices have been measured. We also performed preliminary solitonic shifting experimentations in PCF fiber supporting OAM
Tandjè, Sourou Hugues Arsène. "Conception et caractérisation de fibres optiques à modes à moment angulaire orbital." Electronic Thesis or Diss., Université de Lille (2018-2021), 2019. http://www.theses.fr/2019LILUR032.
Full textOptical fibers (step index and graded-index ones) are widely used for long-haul (intercontinental, terrestrial optical backbone) and short-reach (datacenter, access network) links. Some fibers called specialty optical fibers also play an important role in other applications like medicine (endoscopy for example), sensing, laser applications etc. The constant rise of Internet services combined to the growth of the number of Internet users makes it necessary to increase the current capacity of optical fiber networks. The fibers commercially used today for very high data rate transmissions use only the fundamental mode (denoted LP01, in the weakly guiding approximation) to transmit the information: there are known as single-mode fibers. As they are now reaching the so-called nonlinear Shannon limit, one of the ideas for increasing the capacity of fiber networks is to implement space-division multiplexing (SDM) and then simultaneously use different modes in a so-called few-mode fiber (fiber supporting typically dozens of modes) or a multicore fiber. Since 2010, several studies have been developed in this direction, mainly on fibers supporting LP (Linearly Polarized) modes and more recently OAM (Orbital Angular Momentum) modes, i.e. modes with helical phase and circular polarization. In this last case, phase and polarization properties are supposed to limit the coupling between modes. This PhD work deals with the design and the realization of OAM fibers presenting weak coupling between modes, for application to data transport but also for study in nonlinear photonics. Some of the fibers studied are annular core fibers made by conventional manufacturing methods, having internal / external radii and optimized ring refractive indices. We fabricated such all-solid ring-core fibers with the aim to apply them for simple MIMO transmission using OAM modes as independent channels. However, we also designed and manufactured the first photonic crystal fiber (PCF) with close-to-circular ring-core, low confinement loss and suitable for OAM mode guidance. We experimentally show that the fabricated fibers support OAM modes, and their transmission matrices have been measured. We also performed preliminary solitonic shifting experimentations in PCF fiber supporting OAM
Niemiec, Ronan. "Étude des propriétés du moment angulaire orbital des ondes EM : développement de capteurs, transfert de moment et applications." Thesis, Rennes 1, 2014. http://www.theses.fr/2014REN1S154/document.
Full textAn electromagnetic wave is defined by its amplitude, its wave vector, its frequency and its angular momentum. This momentum can be decomposed into two components: polarization (associated to spin angular momentum), and orbital angular momentum. The later has not been investigated thoroughly until the last few years. To deepen the knowledge on orbital angular momentum, both prototypes and analysis tools have been developed in this thesis. First, study of orbital angular momentum transfer to a macroscopic object, at a frequency of 870 MHz, is presented. An interpretation of the transfer mechanism is then proposed, supported by the calculation of field equations and electromagnetic simulations. Secondly, the conception and the realization of two antennas able to generate an EM wave with orbital angular momentum are presented. These antennas use phase plates with an angular dependent law. The first one is a “spiral” phase plate, with constant permittivity and variable height. The second one has variable permittivity and constant height. Both have been simulated and characterized in CHEOPS anechoic chamber (DGA-MI, Bruz). Measurements of magnitude and phase, on a plane, have been obtained. Lastly, total reflection on planar and curved surfaces and influence of sampling on OAM modes estimation were investigated. Simulation results of reflected waves are promising and show a relationship between the induced deformations and the object reflected on. As for OAM modes estimation, study has been performed using an extraction circle on the wave front. Several parameters (center of the circle, radius) have been considered, and a method for OAM modes estimation on a large bandwidth is proposed
Chappuis, Céline. "Génération d'harmoniques d'ordre élevé à deux faisceaux portant du moment angulaire." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS022/document.
Full textHigh-order harmonic generation is a highly nonlinear laser-matter interaction process which allows the synthesis of sub-femtosecond pulses, also called attosecond (1 as = 10⁻¹⁸ s) pulses. My PhD is centered around the study of angular momentum transfer during this process, in order to control spatial and polarization features of the radiation which is emitted in the extreme ultraviolet. As for matter, the angular momentum of light can be divided into a spin component, associated with the beam’s polarization, and an orbital component, related to the shape of the wavefront. The control of high harmonics’ angular momentum requires generating schemes involving two crossing beams, thus creating a diffraction grating in the generating medium.We have shown that, although the transfer rules obey conservation laws of the angular momentum, the fine description of the phenomenon requires an accurate analysis of the laser field in the generation medium. This work opens the road for advanced shaping of attosecond pulses
Roy, Bruno. "Formation de faisceaux laser avec moment angulaire orbital : fabrication de lames de phase en spirale réflectrices." Thesis, Université Laval, 2011. http://www.theses.ulaval.ca/2011/27771/27771.pdf.
Full textWei, Wenlong. "Contribution à l'étude et la conception d'antennes pour la génération d'ondes radiofréquences transportant du moment angulaire orbital." Thesis, Rennes 1, 2016. http://www.theses.fr/2016REN1S048/document.
Full textIt is well known from Maxwell’s theory that electromagnetic (EM) radiation carries both linear momentum (energy) and angular momentum. The latter has two parts: Spin Angular Momentum (SAM) which corresponds to the polarization of an EM wave and Orbital Angular Momentum (OAM) which is associated with the spatial distribution of an EM wave. The SAM has only two states (left and right) and is used to double the channel capacity in telecommunications. On the other hand, the OAM can theoretically have an infinite number of states called the OAM modes. Therefore, the first applications of OAM have been proposed in wireless communications at radio frequencies. However, first of all, it is necessary to develop the antennas for generating such waves. The objective of this thesis is to design the antennas for the generation of radio waves bearing OAM. The manuscript contains three parts. In the first part, an antenna using 4 patches and an original phase shifter is developed and tested to generate an OAM wave. In the second part, a Fabry-Perot (FP) cavity is used to enhance the directivity of this antenna. The third part is to generate guided OAM waves. Some horn antennas are used to radiate these waves with good directivity
Sanson, Fabrice. "Génération et optimisation d'harmoniques d’ordres élevés portant un moment angulaire orbital pour l'injection dans un plasma de laser X-UV." Thesis, université Paris-Saclay, 2021. http://www.theses.fr/2021UPASP026.
Full textThis document presents the CIFRE/Amplitude thesis work carried out to set up on the LASERIX XUV line an experiment of high harmonic generation by a pump infrared beam carrying a non-zero orbital angular momentum produced by adding a phase plate on the beam path. The originality of our approach was to generate the harmonics in a relatively long gas cell (around 10mm) and to characterize the optical vortices of harmonic 25 by a Extreme Ultraviolet Hartmann. We demonstrated that the sensitivity of the detector and the reliability of the software processing of the data made it possible to verify that harmonic 25 typically carries an orbital angular momentum of 25, as theoretically predicted. Further analysis of the experimental data allowed us to quantitatively demonstrate the intrinsically multimode nature of the produced beams. I have therefore detailed the different methods of analysis proposed in the literature, I could compare their reliability and their relevance to describe the physical phenomenon at work. I also studied in detail the robustness and convergence of the analytical methods applied to beams with typical orbital angular momenta as high as l=25. The analysis of the data allowed me to show the role of even very weak residual astigmatism contained in the pump infrared beam to produce the bi-lobal shape of the vortices. This characteristic shape was also obtained by other teams. One way to regain a truly annular shape is to set up an active optimization loop of the pump laser wavefront. I have also developed propagation and diffraction calculations of beams carrying non-zero orbital angular momenta, whether in EUV or infrared. This allowed me to quantify the multimode character, in terms of LG modes, of the infrared beams passing through a phase plate that was first assumed to be perfect, then real. Then I showed using the single atom model for harmonic generation that this non-linear, non-perturbative process intrinsically induced new radial LG modes. Finally, the objective of all this work for the LASERIX team was to demonstrate the ability of an X-ray laser amplifier plasma pumped from a solid target to amplify a harmonic vortex at the right wavelength, while maintaining its modal structure and in any case the charge carried by the beam. A collaboration with Eduardo Oliva from Madrid, who carries out Maxwell Bloch simulations, shows that this is possible from the point of view of the fundamental physics of the amplification in this wavelength range
Book chapters on the topic "Moment angulaire orbital des quarks"
Burkardt, Matthias. "Quark Orbital Angular Momentum." In Light Cone 2015, 15–19. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-50699-9_4.
Full textLorcé, Cédric, and Keh-Fei Liu. "Quark and Gluon Orbital Angular Momentum: Where Are We?" In Light Cone 2015, 9–14. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-50699-9_3.
Full textPisano, Silvia. "Precise Measurements of DVCS at JLab and Quark Orbital Angular Momentum." In Light Cone 2015, 353–58. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-50699-9_55.
Full textConference papers on the topic "Moment angulaire orbital des quarks"
Burkardt, Matthias. "Quark Orbital Angular Momentum." In QCD Evolution 2015. Trieste, Italy: Sissa Medialab, 2016. http://dx.doi.org/10.22323/1.249.0039.
Full textBurkardt, Matthias. "Aspects of Quark Orbital Angular Momentum." In INT Program INT-18-3. WORLD SCIENTIFIC, 2020. http://dx.doi.org/10.1142/9789811214950_0051.
Full textLorce, Cédric, and Barbara Pasquini. "Quark phase-space distributions and orbital angular momentum." In Sixth International Conference on Quarks and Nuclear Physics. Trieste, Italy: Sissa Medialab, 2012. http://dx.doi.org/10.22323/1.157.0050.
Full textMukherjee, Asmita. "Wigner Distributions and Orbital Angular Momentum of Quarks and Gluons." In QCD Evolution 2015. Trieste, Italy: Sissa Medialab, 2016. http://dx.doi.org/10.22323/1.249.0013.
Full textLi, Bing An. "Quark spin and quark orbital angular momentum content of the proton." In The 11th International symposium on high energy spin physics. AIP, 1995. http://dx.doi.org/10.1063/1.48961.
Full textEllinghaus, F. "Quark Orbital Angular Momentum and Exclusive Processes at HERMES." In INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS: 9th Conference CIPAN2006. AIP, 2006. http://dx.doi.org/10.1063/1.2402714.
Full textLorcé, Cédric, and Barbara Pasquini. "Accessing the quark orbital angular momentum with Wigner distributions." In DIFFRACTION 2012: International Workshop on Diffraction in High Energy Physics. AIP, 2013. http://dx.doi.org/10.1063/1.4802141.
Full textEngelhardt, Michael. "Quark orbital dynamics in the nucleon - from Ji to Jaffe-Manohar orbital angular momentum." In 34th annual International Symposium on Lattice Field Theory. Trieste, Italy: Sissa Medialab, 2016. http://dx.doi.org/10.22323/1.256.0138.
Full textLiuti, Simonetta. "Towards a Direct Measurement of the Quark Orbital Angular Momentum Distribution." In XXIII International Workshop on Deep-Inelastic Scattering. Trieste, Italy: Sissa Medialab, 2016. http://dx.doi.org/10.22323/1.247.0204.
Full textWakamatsu, Masashi. "Orbital angular momenta of quarks and gluons in the nucleon –model‐dependent versus model‐independent extractions–." In 8TH CIRCUM‐PAN‐PACIFIC SYMPOSIUM ON HIGH ENERGY SPIN PHYSICS: PacSPIN2011. American Institute of Physics, 2011. http://dx.doi.org/10.1063/1.3667301.
Full textReports on the topic "Moment angulaire orbital des quarks"
Liu, K. F. Quark orbital angular momentum from lattice QCD. Office of Scientific and Technical Information (OSTI), January 2000. http://dx.doi.org/10.2172/753265.
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