The refractive index (RI) of light propagating in a medium of quark-gluon plasma (QGP) is studied. The weakly coupled QGP is studied in the framework of hard-thermal-loop (HTL) perturbation theory, and the strongly coupled one is treated based on the holographic approach. In more realistic setups, the feasibility of observing the optical phenomenon related to the RI of QGP is also discussed.
We investigate the relativistic equation of state of hadronic matter and quark-gluon plasma at finite temperature and baryon density in the framework of the non-extensive statistical mechanics, characterized by power-law quantum distributions. We impose the Gibbs conditions on the global conservation of baryon number, electric charge and strangeness number. For the hadronic phase, we study an extended relativistic mean-field theoretical model with the inclusion of strange particles (hyperons and mesons). For the quark sector, we employ an extended MIT-Bag model. In this context we focus on the relevance of non-extensive effects in the presence of strange matter.
In this proceeding, we briefly describe the viscous hydrodynamics + hadron cascade hybrid model VISHNU for relativistic heavy ion collisions and report the current status on extracting the QGP viscosity from elliptic flow data.
The Yang-Mills fields plays important role in the strong interaction, which describes the quark gluon plasma. The non-Abelian gauge theory provides the theoretical background understanding of this topic. The real time evolution of the classical fields is derived by the Hamiltonian for SU(2) gauge field tensor. The microcanonical equations of motion is solved on 3 dimensional lattice and chaotic dynamics was searched by the monodromy matrix. The entropy-energy relation was presented by Kolmogorov-Sinai entropy. We used block Hessenberg reduction to compute the eigenvalues of the current matrix. While the purely CPU based algorithm can handle effectively only a small amount of values, the GPUs provide enough performance to give more computing power to solve the problem.
i M e n S i o n
to get calibrated against supersymmetry to such an extent
that they start resembling supersymmetry.
recently, a wholly different route to connecting string
theory to the real world has been developed. on the string
theory side, it is based on the gauge/string duality, which i
introduced in chapter 6. on the real world side, it relates to
heavy ion collisions, which i’ll describe more in the next
section. in such collisions, temperature and density rise so
high that protons and neutrons melt into a fluid called thequark-gluonplasma, or QgP
calculated for different values of the quark mass.
Thequark-gluonplasma may play an important
role in understanding the strong interaction. Exten-
sive studies  have been made in this direction. Some
authors [1 k] have even argued that the creation of
such a plasma in the laboratory can make the in-
volved physics much clearer since one can then use the
well established statistical physics and can thereby
correlate the microscopic information with experi-
mentally observable quantities.
Also the various aspects of confinement and decon
neutrons melt into their constituent
quarks and gluons. The quarks and gluons then form a fluid,
which expands, cools, and eventually freezes back into the
particles that are then observed by the detectors. This fluid
is called thequark-gluonplasma. The connection with string
theory hinges on comparing thequark-gluonplasma to a black
hole. Strangely, the kind of black hole that could be dual to thequark-gluonplasma is not in the four dimensions of our every-
day experience, but in a five-dimensional curved spacetime.
it should be emphasized that string
case, collaborations between similar research
fields are often particularly fruitful. As an example, the
methods used in gravitation and string theory have pro-
vided new approaches for the treatment of so-called
quark-gluon plasmas, a state of matter that character-
ised the early universe during the first few microseconds
after the Big Bang and that is generated and investigat-
ed during extremely high-energy heavy ion collision ex-
periments at the LHC at CERN. The image below shows
numerical simulations of instabilities in thequark-gluonplasma that are
simulations of instabilities in thequark-gluonplasma that are based on theory developed at the TU
Wien and tested on the VSC supercomputer.
The doctoral programme Particles & Interactions is
reinforced by collaborations with the International Max
Planck Research School (IMPRS) on Elementary Particle
Physics in Munich and the doctoral programme “Hadrons
in Vacuum, Nuclei, and Stars” at the University of Graz,
with whom joint educational and training events are or-
“Complex Quantum Systems” (CoQuS): Education
in quantum research
, which is observed at low temperatures and densities, and thequark-gluonplasma state, which occurs at high temperatures and/or densities [ 13 , 16 ]. It is necessary to understand the properties of the QCD vacuum in order to study these phases [ 18 , 19 ]. The QCD ground state is characterized by the quark condensate [ 20 ], which is the consequence of the SCSB. In the present work we study the chiral phase, particularly the CEP, which is the point where a change in the nature of the phase transition occurs. Following the critical line in the QCD phase diagram from