Armen Sedrakian's group at
Institute for Theoretical Physics,
University of Wroclaw
The group works on a range of topics,
including relativistic fluid dynamics and
transport in strongly correlated systems,
nuclear physics of dense matter and compact star.
Research themes are available for Bachelor,
Master and PhD. thesis. Please contact us for
further information at:
Contact : 424, Instytut Fizyki Teoretycznej,
pl. M. Borna 9, 50-204 Wroclaw
Email :
armen.sedrakian@uwr.edu.pl
Group members
Transport in QCD matter and neutron stars
Valeriya Mykhaylova
Ph. D. Student
Neutrino interactions in compact stars
Stefanos Tsiopelas
Ph. D. Student
Relativistic hydrodynamics
and transport theory,
compact stars
Armen Sedrakian
Professor
Research
Relativistic hydrodynamics
Relativistic fluid dynamics is studied with the
non-equilibrium statistical operator formalism
(Zubarev-method), which allows us to formulate
causal hydrodynamics directly from underlying
Lagrangians of quantum statistical systems [1]. One then can
compute the transport coefficients of interest by
evaluating various correlation functions in thermal
field theories [2].
Transport theory
Relativistic Boltzmann equation (BE) is applied to
find the transport coefficients of plasmas, including
electron-ion plasma in hot neutron star crusts
[3a]
and
cold pair-correlated quark matter at high
densities
[4]. The dynamical screening of the
boson-exchange among the fermions is taken into
account by hard-thermal-loop resummations of boson
(photon or gluon) propagators. The effects of
anisotropy introduced by magnetic field and its
implications for MHD simulations has been
studied
[3b].
Compact stars
Recent studies have concentrated on the
effects of the Delta-isobar degrees of freedom in
compact stars
[5]
as well as the possibility of formation
of twins and triplets of compact stars
[6]
(i.e. stars
having the same mass but different radii) due to phase transition(s) in
QCD phase diagram. Recent work included detailed
simulations of hypernuclear compact stars
[7], stars
with (superconducting) quark cores
[8], and
stars that emit axions alongside with neutrinos
[9][10].