Littérature scientifique sur le sujet « Chiralité (physique) »
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Articles de revues sur le sujet "Chiralité (physique)"
Abada, Asmaa, et Sébastien Descotes-Genon. « La chiralité en physique des particules ». Reflets de la physique, no 73 (juillet 2022) : 10–15. http://dx.doi.org/10.1051/refdp/202273010.
Texte intégralZehnacker, Anne, et Pascale Roubin. « Petite histoire de la chiralité, de Pasteur à la physique d’aujourd’hui ». Reflets de la physique, no 73 (juillet 2022) : 5–9. http://dx.doi.org/10.1051/refdp/202273005.
Texte intégralSaadi, Ahmed J., Angus Davison et Christopher M. Wade. « Molecular phylogeny of freshwater snails and limpets (Panpulmonata : Hygrophila) ». Zoological Journal of the Linnean Society 190, no 2 (11 février 2020) : 518–31. http://dx.doi.org/10.1093/zoolinnean/zlz177.
Texte intégralThèses sur le sujet "Chiralité (physique)"
Dentin, Serge. « Contribution à l'étude du secteur baryonique dans la théorie des perturbations chirales ». Aix-Marseille 2, 1990. http://www.theses.fr/1990AIX22077.
Texte intégralChang, Emmanuel. « QCD sur réseaux et les propriétés des mésons lourd-légers : les distributions radiales dans les mésons lourd-légers et le mélange Bº-B̄º dans la limite statique ». Paris 7, 2009. http://www.theses.fr/2009PA077204.
Texte intégralPhenomenology of the heavy-light mesons is investigated by using QCD simulations on the lattice. The work is particularly focused on the light quark dynamics in the heavy-light Systems when the heavy quark is infinitely heavy. The mass splitting between the excited and the lowest lying states has been studied with the unquenched lattice data containing SN__f=2S dynamical light quarks. A very high accuracy of the lattice results for the coupling to the pions is achieved through several improvements over previous lattice computations of these couplings. Moreover, the present study provides a new method which allows for the first lattice determination of the pion emission in the transition between the first excited and the lowest lying heavy-light meson. These couplings are necessary ingredients for the description of heavy-light mesons by an effective theory known as the Heavy Meson Chiral Perturbation Theory. They are also essential in the chiral extrapolations of the lattice results for the quantities which are relevant to the SBS-physics phenomenology. Special attention is devoted to the improvement of the technique of Computing the static heavy quark propagator on the lattice by using the hyper-cubic blocking techniques (HYP). We then make a detailed study of the matrix elements of ail parity conserving four-quark S\Delta B=2S operators which enter the theoretical description of the SB~0S-S\bar B~0S mixing amplitude in the Standard Model, and in its supersymmetric extensions. This is the first such study with HYP-blocked Wilson lines, which provides us with an extra benefit: the spurious mixing of operators computed on the lattice is much smaller with respect to what has been done in the past. Renormalization and matching of Heavy Quark Effective Theory on the lattice to the continuum QCD is made by using boosted perturbation theory. A short discussion of impact of our results on the SBS-physics phenomenology is provided too
Marloie, Gaël. « Des précurseurs organiques à la chiralité : simulations de processus élémentaires en environnement primitif ». Paris 6, 2011. http://www.theses.fr/2011PA066353.
Texte intégralAtawa, Bienvenu. « Mobilité moléculaire et vieillissement physique des composés amorphes chiraux ». Thesis, Normandie, 2018. http://www.theses.fr/2018NORMR125/document.
Texte intégralIn the framework of this thesis, we carried out the study of amorphous chiral molecular systems by evaluating their molecular mobility, the evolution of physical properties during aging and the recrystallization behavior as function of the initial enantiomeric excess (ee). In order to avoid factors additional to chirality itself, we focused on enantiomeric systems forming stable conglomerates (full chiral discrimination in the solid state) by choosing two model compounds: 5-ethy-5-methylhydantoin (12H) and N-acetyl-α-methylbenzylamine (Nac-MBA). From this thesis it was shown that the most spectacular effects of chirality in the amorphous state is expressed in the GFA or the crystallization propensity. The GFA increases as the ee decreases. The kinetics of physical aging is implicitly impacted by chirality. Glassy pure enantiomer requires more time to reach equilibrium than that of an intermediate composition. This situation is hypothetically due to constraints effects mostly resulting from a strong nucleation behavior in the glass state at high ee. Furthermore, the time scale of all the processes (D, α, βJG, γ) and the evolution of their temperature dependency are approximatively identical even though the crystallization behavior is highly impacted by ee. it seems that molecular mobility would not be a key parameter in the crystallization behavior of Nac-MBA. The main expression of chirality in amorphous Nac-MBA is evidenced in the signature of the dielectric strength of both D and α processes
Pham, Kim Anh Aline. « Caractérisation de la chiralité optique dans des systèmes plasmoniques ». Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAY051/document.
Texte intégralIn this thesis, we aim at demonstrating chiral optical effects in plasmonic systems. The manipulation of the different degrees of freedom of light is evidenced by complementary experimental approaches based on polarisation tomography, leakage radiation microscopy and scanning near-field optical microscopy (SNOM). On one hand, we report on a non-invasive method to reveal the coexistence of surface and bulk chirality in plasmonic metasurfaces. Specifically, we extend the model of Kuhn to describe this chirality mixture. On the other hand, we demonstrate two plasmonic devices which rely on the optical spin-orbit coupling to control the spin and the orbital angular momentum of light. In particular, the reciprocal mechanism of the spin-Hall effect of light is shown using T-shaped nano-apertures: the trajectory of surface plasmons can be encoded in the spin of the photons. This which-path marker is then implemented in an interference erazer experiment. Plasmonic vortex generation is also reported in spiral cavities. The spiral chirality rules the intensity as well as the angular orbital momentum of the singular fields. Finally, as a proof of concept, we demonstrate using a conventional and quantum SNOM probe that the local density of optical states can be structured by a chiral environment. We also connect the density and flux chirality to light-matter interactions. Studying chirality in the context of plasmonics opens promising prospects in the optical nano-manipulation, chiral molecules discrimination and the control of quantum sources
Lopez, Xavier. « Production d'étrangeté dans les collisions Ni+Ni à 1. 93 AGeV ». Clermont-Ferrand 2, 2004. https://tel.archives-ouvertes.fr/tel-00009052.
Texte intégralLv, Bingfeng. « Chirality in the ¹³⁶Nd and ¹³⁵Nd nuclei ». Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS353/document.
Texte intégralThe exotic collective excitation mode called chirality has been investigated and long-lived isomers have been searched for in the ¹³⁶Nd and ¹³⁵Nd nuclei. Five pairs of nearly degenerate Δ I=1 bands with the same parity have been identified at high spins in ¹³⁶Nd. The observed bands were investigated by the constrained and tilted axis cranking covariant density functional theory and a new developed four single-j shells particle-rotor model. It was found that the properties of these doublet bands are in good agreement with results of the model calculations. Therefore, the multiple chiral doublets (MχD) phenomenon in the nucleus ¹³⁶Nd was confirmed. This was the first experimental evidence for the MχD bands in even-even nuclei. The five pairs of chiral doublet bands is the largest observed in a single nucleus until now. In addition, the level scheme of the ¹³⁶Nd has been extended significantly at low, medium, and very high spins. Possible configurations of all rotational bands have been assigned by using the cranked Nilsson-Strutinsky model. The band structure of ¹³⁶Nd was clarified and the various types of single-particle and collective excitations were well understood. A new pair of positive-parity chiral doublet bands has been identified in ¹³⁵Nd. The characteristics of the doublet bands support the chiral interpretation. Together with the previously reported negative-parity chiral doublet bands show the presence of MχD bands in ¹³⁵Nd. The observed doublet bands were compared with constrained covariant density functional theory and particle-rotor model calculations which nicely reproduce the experimental data, confirming the MχD phenomenon in this nucleus. The newly observed MχD bands in ¹³⁵Nd represent an important milestone in supporting the existence of MχD in nuclei. The search for long-lived isomeric states in ¹³⁵Nd and ¹³⁶Nd has also been performed. This did not lead to the identification of new isomers, but we could confirm the existence of the previously reported isomers in the nuclei ¹³⁸Nd, ¹³⁴Ce, ¹³⁶Pr, and ¹³⁷Pr in our data
Pasquier, Corinne. « Nouveaux ligands aminophosphinephosphinites et diphosphanes à chiralité métallocénique : application en hydrogénation énantiosélective de cétones et approche du mécanisme par modélisation moléculaire ». Lille 1, 1999. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/1999/50376-1999-221.pdf.
Texte intégralBideo, Lionel. « Etude par la méthode des moments des caractéristiques chirales d'un réseau d'hélices dans un diélectrique ». Toulouse 3, 1996. http://www.theses.fr/1996TOU30113.
Texte intégralThomas, Jean-Charles. « Spectroscopie des noyaux légers déficients en neutrons : Étude des noyaux ²¹Mg, ²⁵Si et ²⁶P, approche systématique du phénomène de l'asymétrie miroir, conception d'un détecteur à gaz pour l'étude de la radioactivité 2 protons ». Bordeaux 1, 2002. http://www.theses.fr/2002BOR12555.
Texte intégralLivres sur le sujet "Chiralité (physique)"
1958-, Reuter Martin, dir. Selected topics in gauge theories. Berlin : Springer-Verlag, 1986.
Trouver le texte intégralJ, Lough W., et Wainer Irving W, dir. Chirality in natural and applied science. Boca Raton : CRC Press/Blackwell Pub., 2002.
Trouver le texte intégralWilen, Samuel H., (Ed.), dir. Stereochemistry of Organic Compounds. Wiley, 1994.
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