Buscar
Mostrando ítems 51-60 de 715
Effective action for delta potentials: Spacetime-dependent inhomogeneities and Casimir self-energy
(American Physical Society, 2021-03)
We study the vacuum fluctuations of a quantum scalar field in the presence of a thin and inhomogeneous flat mirror, modeled with a delta potential. Using heat-kernel techniques, we evaluate the Euclidean effective action ...
Magnetic catalysis and inverse magnetic catalysis in nonlocal chiral quark models
(American Physical Society, 2017-02)
We study the behavior of strongly interacting matter under an external constant magnetic field in the context of nonlocal chiral quark models within the mean field approximation. We find that at zero temperature the behavior ...
Contribution of the ageing effect to the observed asymmetry of interplanetary magnetic clouds
(EDP Sciences, 2020-07)
Context. Large magnetic structures are launched away from the Sun during solar eruptions. They are observed as (interplanetary) coronal mass ejections (ICMEs or CMEs) with coronal and heliospheric imagers. A fraction of ...
Thermal evolution of hybrid stars within the framework of a nonlocal Nambu-Jona-Lasinio model
(American Physical Society, 2015-09)
We study the thermal evolution of neutron stars containing deconfined quark matter in their core. Such objects are generally referred to as quark-hybrid stars. The confined hadronic matter in their core is described in the ...
Dissipative effects in the effective field theory of inflation
(Springer, 2012-01)
We generalize the effective field theory of single clock inflation to include dissipative effects. Working in unitary gauge we couple a set of composite operators, Oµν..., in the effective action which is constrained solely ...
Solving the multi-site and multi-orbital Dynamical Mean Field Theory using Density Matrix Renormalization
(Frontiers Research Foundation, 2018-02)
We implement an efficient numerical method to calculate response functions of complex impurities based on the Density Matrix Renormalization Group (DMRG) and use it as the impurity-solver of the Dynamical Mean Field Theory ...
Optimization of timing of next-generation emergence in Amaranthus hybridus is determined via modulation of seed dormancy by the maternal environment
(Oxford University Press, 2021-05)
The timing of emergence of weed species has critical ecological and agronomical implications. In several species, emergence patterns largely depend on the level of dormancy of the seedbank, which is modulated by specific ...
Dynamical mean field theory with the density matrix renormalization group
(American Physical Society, 2004-12)
A new algorithm to solve the dynamical mean field theory (DMFT) equations of strongly correlated models exploiting the DMRG methodology was presented. The methods uses the density matrix renormalization group technique to ...
Prediction of Effective Properties of Porous Carbon Electrodes from a Parametric 3D Random Morphological Model
(Springer, 2017-10)
Pore structures have a major impact on the transport and electrical properties of electrochemical devices, such as batteries and electric double-layer capacitors (EDLCs). In this work we are concerned with the prediction ...
Isgur-Karl model revisited
(American Physical Society, 2009-12)
We show how to match the Isgur-Karl model to the spin-flavor quark operator expansion used in the 1/Nc studies of the nonstrange negative parity L=1 excited baryons. Using the transformation properties of states and ...