Speaker
Description
In this talk, I will report our recent achievements on the thermodynamics of accelerated gluonic matter.
QCD Phase Transition under Acceleration
Various phases of QCD matter have been studied with external parameters such as temperature, density, magnetic field, and rotation. In this talk, I will discuss acceleration as another parameter for the confinement-deconfinement properties of gluonic matter. It is well known that the Minkowski vacuum state is perceived as a thermal state under acceleration, leading to a critical acceleration for the confinement-deconfinement phase transition. This observation motivates us to ask how finite-temperature QCD is modified in accelerated systems.
Thermodynamics in Accelerated Systems
We investigate the one-loop Polyakov-loop potential for accelerated pure gluonic matter. It is well known that there are subtleties in calculating the free energy or pressure in accelerated systems: multiple different results can be obtained with different calculation methods. Here, we calculated the free energy in three ways: direct calculation in the accelerated frame, calculation using the energy-momentum tensor (EMT) in the accelerated frame, and direct calculation after performing a conformal transformation to the optical frame. As a result, we demonstrated that the calculation using EMT in the accelerated frame agrees with the calculation in the optical frame, and we observed that the direct calculation in the accelerated frame corresponds to the pressure (which, in fact, differs from the negative of the free energy).
We also obtained the Polyakov-loop potential for the accelerated system. The potential becomes steeper as the acceleration increases, indicating that the system becomes more deconfined.