2,709,444 research outputs found
Additional phases induced by the supersymmetric CP phases
The explicit CP violation in the MSSM radiatively induces a finite
unremovable alignment between the Higgs doublets. This additinal phase can be
as large as the original CP phases in certain portions of the MSSM parameter
space. Considering the specific case of the charginos, this additional phase is
shown to induce a conceivable amount of CP violation near the would--be CP
conserving points. Moreover, the CP violation in the absence of this phase is
smaller than the one in the presence of it, and the former can never compete
with the latter, however large is.Comment: 29 pp, 15 fig
Modélisation des phases solides
1. Les solides purs cristallisĂ©s2. Les solutions solides3. Non-stoechiomĂ©trie dans les solides4. Solutions solides et Ă©lĂ©ments de structureInternational audienceLa sĂ©rie Thermodynamique chimique approfondie prĂ©sente lâensemble des thĂšmes de la thermodynamique utiles Ă la chimie, aux matĂ©riaux, Ă lâĂ©lectrochimie, aux phĂ©nomĂšnes de surface et au gĂ©nie des procĂ©dĂ©s.En modĂ©lisation des phases solides, les modĂšles des oscillateurs dâEinstein et de Debye permettent de calculer des fonctions de partition et de mesurer la capacitĂ© calorifique et la dilatation thermique des quatre types de solides purs : les atomiques, les ioniques, les molĂ©culaires et les mĂ©talliques.Les notions dâordre et de dĂ©sordre Ă courte et longue distances sont Ă©galement dĂ©crites, la transformation des alliages est analysĂ©e en utilisant la mĂ©thode quasi-chimique. Cette procĂ©dure a Ă©tĂ© retenue pour lâĂ©tude des dĂ©fauts ponctuels et de la nonstoechiomĂ©trie des solides. Les consĂ©quences de ces propriĂ©tĂ©s sont examinĂ©es tant sur les solides purs que sur des solutions solides
Phases Dynamic Balancer
Most of the current domestic installations are single phase, with contracted power equal to or less than 15 kW and with a potential difference of 230 V. When consumption is expected to be higher you choose to use three different alternating currents with a difference voltage of 400 V between them, which are called phases. This enables the subdivision of the installation in different single-phase circuits, fed independently with the neutral installation. These couples have, in turn, a difference in voltage of 230 V. The neutral is common for all three phases so that, if the system is balanced, no current flows through it. The problem with these installations is that they are designed to work in an offset manner, using phase loads, and simultaneously an equal amount of energy consumed by the three phases of the network. Connection to each of the phases makes independent single-phase loads or disturbance of the operation of the original phase circuit and, consequently, the corresponding increases in consumption, heating of engines, etc.Universidad de MĂĄlaga. Campus de Excelencia Internacional AndalucĂa Tech
Holographic Higgs Phases
We discuss phases of gauge theories in the holographic context, and formulate
a criterion for the existence of a Higgs phase, where the gauge redundancy is
"spontaneously broken", in purely bulk language. This condition, the existence
of a finite tension solitonic string representing a narrow magnetic flux tube,
is necessary for a bulk theory to be interpreted as a Higgs phase of a boundary
gauge theory. We demonstrate the existence of such solitons in both top-down
and bottom-up examples of holographic theories. In particular, we numerically
construct new solitonic solutions in AdS black hole background, for various
values of the boundary gauge coupling, which are used to demonstrate that the
bulk theory models a superconductor, rather than a superfluid. The criterion we
find is expected to be useful in finding holographic duals of color
superconducting phases of gauge theories at finite density.Comment: Corrected typo
Flexoelectric blue phases
We describe the occurence and properties of liquid crystal phases showing two
dimensional splay and bend distortions which are stabilised by flexoelectric
interactions. These phases are characterised by regions of locally double
splayed order separated by topological defects and are thus highly analogous to
the blue phases of cholesteric liquid crystals. We present a mean field
analysis based upon the Landau--de Gennes Q-tensor theory and construct a phase
diagram for flexoelectric structures using analytic and numerical results. We
stress the similarities and discrepancies between the cholesteric and
flexoelectric cases.Comment: 4 pages, accepted for publication in Phys. Rev. Let
Transformations entre phases
International audienceLa sĂ©rie Thermodynamique chimique approfondie prĂ©sente lâensemble des thĂšmes de la thermodynamique utiles Ă la chimie, aux matĂ©riaux, Ă lâĂ©lectrochimie, aux phĂ©nomĂšnes de surface et au gĂ©nie des procĂ©dĂ©s.Cet ouvrage est consacrĂ© Ă lâĂ©tude des transformations et des Ă©quilibres entre phases. Les transformations des phases pures du premier et du second ordre sont prĂ©sentĂ©es en dĂ©tail, tout comme les approches macroscopiques et microscopiques des Ă©quilibres de phases.Dans la prĂ©sentation des systĂšmes binaires, les thermodynamiques de lâazĂ©otropie et de la dĂ©mixtion sont approfondies et appliquĂ©es aux solutions strictement rĂ©guliĂšres. Les points eutectiques et pĂ©ritectiques sont examinĂ©s, ainsi que les rĂ©actions qui les accompagnent. LâĂ©tude des systĂšmes ternaires introduit quant Ă elle les notions dâazĂ©otropes et dâeutectiques ternaires. Pour chaque type de systĂšmes solide-liquide les interventions de composĂ©s dĂ©finis Ă fusion congruente ou non sont prises en compte. Les propriĂ©tĂ©s particuliĂšres des diffĂ©rents points remarquables dâun diagramme sont Ă©galement dĂ©montrĂ©es
Modélisation des phases liquides
1. Les liquides purs2. ModĂ©lisation macroscopique des solutions molĂ©culaires liquides3. ModĂ©lisation microscopique des solutions molĂ©culaires liquides4. Les solutions ioniques5. Mesure de lâactivitĂ© dâun constituant dâune solutionInternational audienceLa sĂ©rie Thermodynamique chimique approfondie prĂ©sente lâensemble des thĂšmes de la thermodynamique utiles Ă la chimie, aux matĂ©riaux, Ă lâĂ©lectrochimie, aux phĂ©nomĂšnes de surface et au gĂ©nie des procĂ©dĂ©s.Cet ouvrage traite de la modĂ©lisation des phases liquides. Les liquides purs sont dĂ©crits par les deux voies de la fonction de distribution radiale et des fonctions de partition.DiffĂ©rents modĂšles qui vont des plus simples aux plus complexes sont prĂ©sentĂ©s. Les modĂšles de solution molĂ©culaires macroscopiques et microscopiques les plus modernes, qui intĂšgrent les notions de composition locale et dâentropie dâexcĂšs combinatoire, ainsi que les modĂšles de solutions ioniques qui combinent le terme dĂ» aux effets Ă©lectriques (le modĂšle de Debye et HĂŒckel) et les termes de composition locale et dâentropie dâexcĂšs combinatoire.LâexposĂ© des diffĂ©rentes mĂ©thodes expĂ©rimentales de dĂ©termination de lâactivitĂ© ou du coefficient dâactivitĂ© dâun constituant dâune solution est Ă©galement dĂ©veloppĂ©
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