Showing papers in "Progress of Theoretical Physics in 1985"
TL;DR: Les regions explosives et laminaires forment une structure geometrique dans l'espace-temps, analogue a celle trouvee dans des automates cellulaires as mentioned in this paper.
Abstract: Les regions explosives et laminaires forment une structure geometrique dans l'espace-temps, analogue a celle trouvee dans des automates cellulaires. On etudie le mecanisme de formation de ces structures. On calcule les spectres de Lyapunov
328 citations
TL;DR: In this paper, the Wess-Zumino anomaly equation was solved by incorporating vector mesons as dynamical gauge bosons of the hidden local symmetry in the nonlinear chiral Lagrangian.
Abstract: We present general solutions to the Wess-Zumino anomaly equation which incorporate vector mesons as dynamical gauge bosons of the hidden local symmetry in the nonlinear chiral Lagrangian. In contrast to the previous attempts to introduce the vector mesons, our formalism enables one to treat consistently and systematically various processes associated with pseudoscalar mesons (Nambu-Goldsone bosons) and vector mesons (dynamical gauge bosons); it is automatic in this framework that the on-shell amplitudes of photons and pseudoscalar mesons such as π^0 →2γ and γ→3 π which are fixed by the low energy theorems, are not affected no matter how the vector mesons participate in those processes. We further show that the “complete vector meson dominance” hypothesis of photon couplings is invalid in either π^0 →2γ or γ→3π process.
226 citations
TL;DR: In this paper, a chaos couple constitue of two sous-systemes legerement au-dessous du point de transition separant le chaos uniforme d'un etat non uniforme.
Abstract: On etudie numeriquement un systeme a chaos couple constitue de 2 sous-systemes legerement au-dessous du point de transition separant le chaos uniforme d'un etat non uniforme. On montre que le systeme presente deux types d'intermittences, dependant des proprietes statistiques du chaos uniforme
151 citations
TL;DR: In this paper, the transformation laws of the most general multiplets with arbitrary external Lorentz indices were completely determined, and then the spinor derivative operations were defined for N = 1 conformal supergravity.
Abstract: In N = 1 conformal supergravity, we completely determine the transformation laws of the most general multiplets with arbitrary external Lorentz indices, and· then define the spinor derivative operations. Unconstrained (general type) multiplets exist for arbitrary external indices while chiral and linear multiplets exist only for purely undotted spinor indices. This comes from the particular fact that the superconformal spinor derivative is covariant only on multiplets satisfying some restrictive conditions. We define also a new class of spinor derivative operators each of which depends on the choice of a multiplet u playing the role of covariantization but is applicable covariantly to any multiplets. New chiral and linear multiplets defined through these spinor derivatives exist for arbitrary external Lorentz indices when ii is a (real or complex) linear multiplet. The connections of these spinor derivatives and constrained multiplets to those in superspace formulations of Poincare supergravities are clarified.
147 citations
TL;DR: In this article, the methode d'integrale de parcours a 2 systemes en interaction, on montre que la phase specifique Γ apparaissant dans le processus adiabatique quantique recemment trouve par Berry et Simon s'obtient comme une action additive a la fonctionnelle d'action dynamique conventionnelle.
Abstract: En appliquant la methode d'integrale de parcours a 2 systemes en interaction, on montre que la phase specifique Γ apparaissant dans le processus adiabatique quantique recemment trouve par Berry et Simon s'obtient comme une action additive a la fonctionnelle d'action dynamique conventionnelle
123 citations
TL;DR: In this paper, a mean field approximation with the use of a QCD-motivated effective Lagrangian was proposed for chiral symmetry breaking and restoration in a system with zero temperature and zero chemical potential.
Abstract: Possible critical phenomena associated with chiral symmetry breaking and restoration are studied in the mean field approximation with the use of a QCD-motivated effective Lagrangian. Collective excitations in a system with zero temperature and zero chemical potential are examined extensively: It is shown that (i) there exists a precursory mode in the Wigner phase, which softens as the system approaches the critical point for chiral symmetry breaking, and (ii) the σ-meson mode in the Nambu-Goldstone (NG) phase softens being associated with symmetry restoration. The observabilities of these critical phenomena in experiment such as ultra-relativistic heavy ion collisions are discussed. We also calculate the critical temperature T_χ and critical chemical potential µ_χ where chiral symmetry gets restored and we obtain T_χ=164 MeV for (N_c=3, N_f=2)-case without free parameters.
112 citations
TL;DR: In this article, a cadre fondamental pour construire une theorie quantique du champ pour des systemes ouverts is etabli sur deux concepts de base: le gros grain realise par la methode de projection de la theorie de l'amortissement and l'etat thermique, concept fondamental de la dynamique des thermochamps.
Abstract: Un cadre fondamental pour construire une theorie quantique du champ pour des systemes ouverts est etabli sur deux concepts de base: le gros grain realise par la methode de projection de la theorie de l'amortissement et l'etat thermique, concept fondamental de la dynamique des thermochamps
112 citations
Journal Article•
TL;DR: In this article, the concept of metaconscious is introduced to explain the hermeneutic process of the human brain and the difference between the functions of the brain and of the present artificial intelligence.
Abstract: the brain. Concerning a pattern recognition, the difference between the functions of the brain and of the present artificial intelligence is discussed. The concept of metaconscious is introduced to explain the hermeneutic process. In this relation, it is suggested that the existence of a hidden dynamics is of importance for man's cognition.
102 citations
TL;DR: On etudie la contribution fermionique aux champs de jauge externe dans un espace temps de dimension impaire avec Fermion de Wilson reticule pour obtenir l'invariant topologique as mentioned in this paper.
Abstract: On etudie la contribution fermionique aux champs de jauge externe dans un espace temps de dimension impaire avec fermion de Wilson reticule pour obtenir l'invariant topologique, de la classe de Chern-Simons
69 citations
TL;DR: In this article, a geometrie en trou de vers de Schwarzschild est instable par rapport aux effets gravitationnels de matiere et de rayonnement decales vers le bleu accumules ou des strates bleues.
Abstract: On trouve que la geometrie en trou de vers de Schwarzschild est instable par rapport aux effets gravitationnels de matiere et de rayonnement decales vers le bleu accumules ou des strates bleues le long des horizons passe. On le montre en construisant un modele simple de geometrie de trou de vers en caracterisant de telles strates bleues et en manifestant leurs effets
67 citations
TL;DR: On etudie l'action covariante de supercorde dans le formalisme canonique pour la dynamique hamiltonienne avec contraintes de Dirac.
Abstract: On etudie l'action covariante de supercorde dans le formalisme canonique pour la dynamique hamiltonienne avec contraintes de Dirac
TL;DR: Classification de theorie des groupes des etats supraconducteurs d'appariement d'ondes p for un systeme a symetrie cristalline cubique en l'absence de couplage spin-orbite as mentioned in this paper.
Abstract: Classification de theorie des groupes des etats supraconducteurs d'appariement d'ondes p pour un systeme a symetrie cristalline cubique en l'absence de couplage spin-orbite
TL;DR: In this paper, the Suzuki-Trotter formula has been used to get the mth approximant to the classical representation of the partition function of the one-dimensional N-spin 5+ quantum spin systems.
Abstract: , ' The Suzuki-Trotter formula has been used to get the mth approximant to the classical representation of the partition function of the one-dimensional N-spin 5=+ quantum spin systems. The equivalent two-dimensional (NX2m) Ising model with four-spin interactions has been studied in detail by using the numerically exact transfer-matrix method for T;;;;O.05 and m~8. The convergence properties have been examined in two different representations; checkerboard decomposition (CBD) and real-space decomposition (RSD). The spin correlation functions in RSD converge much faster than those in CBD. The limiting m --+ 00 behavior has been estimated from the extrapolation formula of the form: E( m) = E( 00 ) +a/m 2 • The limiting values of the energy derived from the nearest-neighbor correlation agree with: the correct values excellently.
TL;DR: In this paper, les proprietes dynamiques du phenomene critique du modele d'Ising cinetique a 2 dimensions au dessus et au Dessous de la temperature critique Tc.
Abstract: On etudie les proprietes dynamiques du phenomene critique du modele d'Ising cinetique a 2 dimensions au dessus et au dessous de la temperature critique Tc. On etudie le glissement critique (T>Tc) et la rupture de symetrie (T
TL;DR: In this article, the effective ΛN and ΣN interactions are proposed on the basis of the G-matrices calculated for the Nijmegen OBE model D interaction, which are parametrized by three-range Gaussian forms for the sake of convenience in applying them to various hypernuclear problems.
Abstract: The effective ΛN and ΣN interactions are proposed on the basis of the G-matrices calculated for the Nijmegen OBE model D interaction. They are parametrized by three-range Gaussian forms for the sake of convenience in applying them to various hypernuclear problems. The effective two-body LS and antisymmetric LS interactions are also derived. Single particle energies of some typical Λ hypernuclei such as ^5_ΛHe, ^16, 17_ΛO and ^40, 41_ΛCa are nicely reproduced with the use of our ΛN interaction. The ΣN interaction is complex and its imaginary part is related to ΣΛ convension widths. Qualitative features of single particle energies and widths of Σ states are discussed.
TL;DR: On etudie la production de paire electron-positron dans un plasma d'accretion chaud autour d'un trou noir supermassif en relation avec le noyau galactique actif as mentioned in this paper.
Abstract: On etudie la production de paire electron-positron dans un plasma d'accretion chaud autour d'un trou noir supermassif en relation avec le noyau galactique actif
TL;DR: In this paper, a relativistic theory of gravitation (RTG) is constructed on the basis of the special relativity and geometrization principle, in which a gravitational field is treated as the Faraday-Maxwell spin-2 and spin-0 physical field possessing energy and momentum.
Abstract: In the present paper a relativistic theory of gravitation (RTG) is unambiguously constructed on the basis of the special relativity and geometrization principle In this a gravitational field is treated as the Faraday-Maxwell spin-2 and spin-0 physical field possessing energy and momentum The source of a gravitational field is the total conserved energy-momentum tensor of matter and of a gravitational field in Minkowski space In the RTG the conservation laws are strictly filfilled for the energy-momentum and for the angular momentum of matter and a gravitational field The theory explains the whole available set of experiments on gravity By virtue of the geometrization principle, the Riemannian space in our theory is of field origin, since it appears as an effective force space due to the action of a gravitational field on matter The RTG leads to an exceptionally strong prediction: The universe is not closed but just “flat” This suggests that in the universe a “missing mass” should exist in a form of matter
TL;DR: In this paper, an approximation harmonique autocoherente and un developpement a partir de la limite classique en puissance de 1/S are presented.
Abstract: Estimation de l'energie de l'etat fondamental pour divers reseaux en utilisant une approximation harmonique autocoherente et un developpement a partir de la limite classique en puissance de 1/S. Une theorie d'ondes de spin due a Villain donne le terme du premier ordre en 1/S et la correction du second ordre est obtenue d'apres une solution iterative des equations dans l'approximation harmonique autocoherente
TL;DR: In this article, a supersymetrique de Leibnitz was used to support the operation of translation in the reseau en utilisant l'operateur difference.
Abstract: On definit une operation de translation continue sur le reseau en utilisant l'operateur difference. Il permet de construire une interaction reticulee supersymetrique qui permet d'utiliser la regle de Leibnitz. On utilise une extension supersymetrique du fermion de Wilson
Journal Article•
TL;DR: Proposition d'un modele numerique dans lequel le materiau est considere comme un ensemble de bâtonnets fragiles repondant de facon non lineaire aux deplacements: de faibles fluctuations des conditions initiales sont alors amplifiees par la non linearite selon une regle d'evolution deterministe and observe the formation de fissures a ramification aleatoire.
Abstract: Proposition d'un modele numerique dans lequel le materiau est considere comme un ensemble de bâtonnets fragiles repondant de facon non lineaire aux deplacements: de faibles fluctuations des conditions initiales sont alors amplifiees par la non linearite selon une regle d'evolution deterministe et on observe la formation de fissures a ramification aleatoire
TL;DR: In this paper, the response function of a uniformly accelerated detector of the De Witt monopole type coupled to a free scalar field in Minkowski manifold of arbitrary dimension is investigated.
Abstract: (Received May 14, 1984) The response function of a uniformly accelerated detector of the De Witt monopole type coupled to a free scalar field in Minkowski manifold of arbitrary dimension is investigated. The principle of detailed balancing is shown to be obeyed. The response is identical to that of the detector at rest in a thermal bath only for a massless field in two or four dimensional spacetime. For a massive field the identity will result provided the line width of the detector is much larger than a value determined by the mass and the acceleration.
TL;DR: In this paper, a quantification stochastique canonique en introduisant l'equation de Langevin d'impulsion π(x,t) is introduced.
Abstract: On propose une quantification stochastique canonique en introduisant l'equation de Langevin d'impulsion π(x,t). On obtient la methode de moyenne de Gibbs comme une consequence de cette quantification stochastique canonique
TL;DR: In this paper, anomalies chirale et de Lorentz locale dans l'espace courbe a 4-dimensional space with torsion were evaluated using the methode d'integrale de parcours.
Abstract: On evalue les anomalies chirale et de Lorentz locale dans l'espace courbe a 4 dimensions avec torsion en utilisant la methode d'integrale de parcours et le coefficient de developpement du noyau de la chaleur. La forme de l'anomalie chirale montre que la torsion n'affecte pas le theoreme de l'indice
TL;DR: In this article, a transition d'ordre 1 au-dessous and deordre 2 au -dessus du point tricritique dependent on the parametre de Landau is presented.
Abstract: Etude par l'approximation de couplage faible. Calcul de l'energie libre de la phase B et comparaison a l'etat planaire; bon accord du diagramme d'etat calcule avec les resultats experimentaux disponibles. Mise en evidence d'une transition d'ordre 1 au-dessous et d'ordre 2 au-dessus du point tricritique qui depend du parametre de Landau