Holographic Collisions, Phase Transitions and Inhomogeneous Horizons

講演日:2018.03.01 (Thu)


Dr. Miguel Zilhao (Lisbon)


Understanding the dynamics of out-of-equilibrium matter in strongly coupled
systems is an important and challenging problem in theoretical physics. A
particularly interesting example is the Quark-Gluon Plasma formed in
relativistic colliders such as RHIC or the LHC, which motivates the study of the
relaxation process in strongly coupled non-abelian field theories. In this talk
it will be shown how we use holography to map the dynamics of a non-conformal
gauge theory to a gravitational system, and the strategy we use to numerically
evolve Einstein's equations. With these tools, we can perform holographic Heavy
Ion collisions at different energies in gauge theories with different degrees of
non-conformality, and analyse corresponding relaxation times. We will also see
how we can study the spinodal instability of a four-dimensional,
strongly-coupled gauge theory with a first-order thermal phase transition by
evolving the dual gravitational description, which is afflicted by a
Gregory-Laflamme instability. We numerically evolve Einstein's equations to
follow the instability until the system settles down to some stationary,
inhomogeneous black brane, and show that the time evolution of the instability
and the final states are accurately described by second-order hydrodynamics.


時間: 16:00~17:00
教室: 3号館501教室