5,203 research outputs found
Inhomogeneous color superconductivity and the cooling of compact stars
In this talk I discuss the inhomogeneous (LOFF) color superconductive phases
of Quantum Chromodynamics (QCD). In particular, I show the effect of a core of
LOFF phase on the cooling of a compact star.Comment: 4 pages, 1 figure, uses aiproc style. Talk given at "Quark
confinement and the hadron spectrum", Ponta Delgada, Acores, Portugal, 2-7
September 200
Phase diagram and pion modes of the neutral Nambu-Jona Lasinio model with the Polyakov loop
I discuss recent results obtained by our group within the Nambu-Jona Lasinio
model with the Polyakov loop. I focus on the two flavor version of the model,
discussing the phase diagram in the plane in the case in which
electrical neutrality is required. One of the results is that pion condensation
is not observed in our model when a physical mass for the light quarks is
considered.Comment: 6 pages, 3 figures. Invited talk at the YITP international symposium
on ``Fundamental Problems in Hot and/or Dense QCD'', Kyoto, Japan, 3-6 Mar
200
Effect of neutrino trapping on the three flavor FFLO phase of QCD
We compute the effect of a non-zero lepton chemical potential on the
structure of the three flavor Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase of
QCD at finite temperature. We show that, as in the BCS case, the lepton
chemical potential favors two-species color superconductivity and disfavors the
three species pairing. We stress that this study could be relevant for the
cooling of a proto-neutron star with a FFLO core, if the temperatures are
higher than the un-trapping temperature.Comment: 12 pages, 2 figures, RevTeX4 class. Changed Fig. 2 (see text) and
some reference adde
Energy density fluctuations in Early Universe
The primordial nucleosinthesys of the element can be influenced by the
transitions of phase that take place after the Big Bang, such as the QCD
transition. In order to study the effect of this phase transition, in this work
we compute the time evolution of thermodynamical quantities of the early
universe, focusing on temperature and energy density fluctuations, by solving
the relevant equations of motion using as input the lattice QCD equation of
state to describe the strongly interacting matter in the early universe plasma.
We also study the effect of a primordial strong magnetic field by means of a
phenomenological equation of state. Our results show that small inhomogeneities
of strongly interacting matter in the early Universe are moderately damped
during the crossover.Comment: 4 pages, 2 figures. Talk given at Sventh European Summer School on
Experimental Nuclear Astrophysics, 15-27 September 2013, Santa Tecla (CT) -
Ital
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