2,523 research outputs found
VSR symmetries in the DKP algebra: the interplay between Dirac and Elko spinor fields
VSR symmetries are here naturally incorporated in the DKP algebra on the
spin-0 and the spin-1 DKP sectors. We show that the Elko (dark) spinor fields
structure plays an essential role on accomplishing this aim, unravelling hidden
symmetries on the bosonic DKP fields under the action of discrete symmetries.Comment: 17 page
Resgate de germoplasma vegetal de espécies-alvo na área de influência do Aproveitamento Hidrelétrico Barra Grande (RS, SC).
bitstream/CENARGEN/29675/1/doc223.pd
Perfect Quantum Privacy Implies Nonlocality
Private states are those quantum states from which a perfectly secure
cryptographic key can be extracted. They represent the basic unit of quantum
privacy. In this work we show that all states belonging to this class violate a
Bell inequality. This result establishes a connection between perfect privacy
and nonlocality in the quantum domain.Comment: 4 pages, published versio
Connecting the generalized robustness and the geometric measure of entanglement
The main goal of this paper is to provide a connection between the
generalized robustness of entanglement () and the geometric measure of
entanglement (). First, we show that the generalized robustness is
always higher than or equal to the geometric measure. Then we find a tighter
lower bound to based only on the purity of and its maximal
overlap to a separable state. As we will see it is also possible to express
this lower bound in terms of .Comment: 4 pages, 2 figures. Comments welcome. v2: text improved - some
completely symmetric states were used to illustrate the results. Comments are
always welcome! v3: minor changes. Accepted by Phys. Rev. A. v4: results on
symmetric states fixe
Flag-Dipole Spinor Fields in ESK Gravities
We consider the Riemann-Cartan geometry as a basis for the
Einstein-Sciama-Kibble theory coupled to spinor fields: we focus on and
conformal gravities, regarding the flag-dipole spinor fields, type-(4) spinor
fields under the Lounesto classification. We study such theories in specific
cases given for instance by cosmological scenarios: we find that in such
background the Dirac equation admits solutions that are not Dirac spinor
fields, but in fact the aforementioned flag-dipoles ones. These solutions are
important from a theoretical perspective, as they evince that spinor fields are
not necessarily determined by their dynamics, but also a discussion on their
structural (algebraic) properties must be carried off. Furthermore, the
phenomenological point of view is shown to be also relevant, since for
isotropic Universes they circumvent the question whether spinor fields do
undergo the Cosmological Principle.Comment: 18 pages, improved versio
Conservação de propágulos de cajueiro anão precoce para enxertia por borbulhia.
No presente trabalho, foram testados varios tipos de materiais com o objetivo de se determinar as condicoes mais adequadas para o acondicionamento de propagulos, fornecedores de borbulhas de cajueiro anao precoce, mantendo sua viabilidade, mesmo quando se necessitar de mais de tres dias para se proceder a enxertia.bitstream/CNPAT-2010/5352/1/Ct-020.pd
Jardins clonais e jardins de semente para a produçao de mudas de cajueiro
bitstream/CNPAT/7907/1/doc51.pd
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