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Abstract：
In this work the non-abelian gauge theory is reformulated in a rotating frame. With this new formalism, the influence of the background rotation on the color deconfinement transition for an SU(2) pure gluon system has been studied. The KvBLL caloron, which is a color-neutral and topologically nontrivial solution of Yang-Mills equation at finite temperature, is reexamined under rotation and adopted as the confined QCD vacuum. With new solutions of the caloron's constituent solitons, i.e. dyons, the confined semi-classical potential of the rotating system has been obtained. Combining with the perturbative potential induced by Gaussian fluctuations, the critical temperature of confinement-deconfinement phase transition is investigated. It is found that neither the rotational semi-classical potential nor Gaussian fluctuations can confine color charges more tightly when the rotation becomes faster. While only a stronger coupling constant is able to make the critical temperature increase with angular velocity, as indicated in lattice simulations. And it is also found a non-monotonic dependence of the critical temperature on the angular velocity is established because of the competition between these two contrary contributions.
Biography:
I obtained my bachelor's degree from the University of Science and Technology of China in 2008 and PhD from Tsinghua University in 2013. From 2013 to 2017 I completed my postdoctoral research at Indiana University in the USA and Heidelberg University in Germany. Since 2017 I have worked in Beihang University as an associate professor. My research interests are topics of the QCD phase transition and phenomenology of quark-gluon plasma.
Host: Prof. Yifeng Sun
Alternative online link: https://meeting.tencent.com/dm/pt6K0oDSun50 (id: 842783652 passcode: 123456）