Семинар «Теория адронного вещества при экстремальных условиях»

Дата и время: среда, 24 марта 2021 г., в 16:00

Место: Онлайн-конференция в Zoom, Лаборатория теоретической физики им. Н.Н. Боголюбова

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Тема семинара: «On rotating quark-gluon plasma within the holographic approach»

Докладчик: Анастасия Голубцова

Аннотация:

We consider a 5d Kerr-AdS black hole to describe a rotating quark-gluon plasma using the holography duality. We study thermodynamics of the 5d Kerr-AdS black holes. We find that rotation has an influence on the first order phase transition, namely, it decreases the critical temperature. We also discuss heavy quark dynamics in the quark-gluon plasma. For our analysis we follow up the holographic approach, where the motion of a heavy quark in QGP is dual to an open string with an endpoint at the boundary of the background under consideration. In our case the string is stretched down from the Kerr- AdS space boundary to the black hole horizon. The dynamics of the string is described by the Nambu-Goto action. To solve the corresponding equations we expand an ansatz for solutions in series by a rotating parameter, then we solve the linearized version of these equations of motion and calculate the components of conjugate momenta. According to the holographic dictionary the force that acts on a heavy quark moving in QGP is related to the components of the conjugate string momenta. We also find the thermal mass of the quark at rest, that is associated to the total energy of the straight static string. We perform calculations both in Boyer-Lindquist (rotating-at-infinity frame) and AdS (static-at-infinity frame) coordinate systems and find a good agreement with the results obtained from the holographic model of the lower dimension.