1,153 research outputs found
Anomaly induced transport in non-anomalous currents
Quantum anomalies are one of the subtlest properties of relativistic field
theories. They give rise to non-dissipative transport coefficients in the
hydrodynamic expansion. In particular a magnetic field can induce an anomalous
current via the chiral magnetic effect. In this work we explore the possibility
that anomalies can induce a chiral magnetic effect in non-anomalous currents as
well. This effect is implemented through an explicit breaking of the
symmetries.Comment: 8 pages, 1 figure. Presented by E.Megias at the 5th International
Conference on New Frontiers in Physics (ICNFP 2016), 6-14 July 2016,
Kolymbari, Crete, Greece; v2 added reference
Thermodynamics of 5D dilaton-gravity
We calculate the free energy, spatial string tension and Polyakov loop of the
gluon plasma using the dilaton potential of Ref. arXiv:0911.0627[hep-ph] in the
dilaton-gravity theory of AdS/QCD. The free energy is computed from the Black
Hole solutions of the Einstein equations in two ways: first, from the
Bekenstein-Hawking proportionality of the entropy with the area of the horizon,
and secondly from the Page-Hawking computation of the free energy. The finite
temperature behaviour of the spatial string tension and Polyakov loop follow
from the corresponding string theory in AdS_5. Comparison with lattice data is
made.Comment: 3 pages, 3 figures. Talk given at the IX International Conference on
Quark Confinement and the Hadron Spectrum (QCHS9), Madrid, Spain, 30 Aug. - 3
Sep. 201
Correlation between conserved charges in PNJL Model with multi-quark interactions
We present a study of correlations among conserved charges like baryon
number, electric charge and strangeness in the framework of 2+1 flavor Polyakov
loop extended Nambu-Jona-Lasinio model at vanishing chemical potentials, up to
fourth order. Correlations up to second order have been measured in Lattice QCD
which compares well with our estimates given the inherent difference in the
pion masses in the two systems. Possible physical implications of these
correlations and their importance in understanding the matter obtained in
heavy-ion collisions are discussed. We also present comparison of the results
with the commonly used unbound effective potential in the quark sector of this
model
One-loop effective action of QCD at high temperature using the heat kernel method
Perturbation theory is an important tool to describe the properties of QCD at
very high temperatures. Recently a new technique has been proposed to compute
the one-loop effective action of QCD at finite temperature by making a gauge
covariant derivative expansion, which is fully consistent with topologically
small and large gauge transformations (also time dependent transformations).
This technique is based on the heat kernel expansion, and the thermal Wilson
line plays an essential role. We consider a general SU(N_c) gauge group.Comment: 3 pages, no figures. Proceedings for IX Hadron Physics and VII
Relativistic Aspects of Nuclear Physics, Angra dos Reis, Rio de Janeiro,
March 28 - April 03, 200
Far-from-equilibrium energy flow and entanglement entropy
The time evolution of the energy transport triggered in a strongly coupled
system by a temperature gradient is holographically related to the evolution of
an asymptotically AdS black brane. We study the far-from-equilibrium properties
of such a system by using the AdS/CFT correspondence. In particular, we
describe the appearance of a steady state, and study the information flow by
computing the time evolution of the holographic entanglement entropy. Some
universal properties of the quenching process are presented.Comment: 12 pages, 7 figures. Plenary talk given by E.Megias at the 5th
International Conference on New Frontiers in Physics (ICNFP 2016), 6-14 July
2016, Kolymbari, Crete, Greec
Anomalous transport in second order hydrodynamics
We study the non-dissipative transport effects appearing at second order in
the hydrodynamic expansion for a non-interacting gas of chiral fermions by
using the partition function formalism. We discuss some features of the
corresponding constitutive relations, derive the explicit expressions for the
conductivities and compare with existing results in the literature.Comment: 9 pages. Talk given by E.Megias at the 4th International Conference
on New Frontiers in Physics (ICNFP 2015), 23-30 August 2015, Kolymbari,
Crete, Greec
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