Quantum transport theory and nonequilibrium chiral condensates |
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| Authors: | Pengfei Zhuang |
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| Institution: | (1) Department of Physics, Tsinghua University, 100084 Beijing, China;(2) Institute of Theoretical Physics, Chinese Academy of Sciences, 100080 Beijing, China |
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| Abstract: | Quantum transport theory and disoriented chiral condensate (DCC) in the Nambu-Jona-Lasinio model are investigated. The kinetic
equations are derived in covariant and equal-time formulations. It is found that DCC is closely connected with the fluctuation
of quark spin density. For the longitudinally expanding system, which models a highenergy nucleus-nucleus collision, a DCC
present initially is quickly dissolved due to the expansion and the collision processes. However, the quantum off-shell effect
leads to a strong fluctuation of DCC.
Project supported in part by the National Natural Science Foundation of China (Grant No. 19845001) and Cao Guangbiao Foundation
of Tsinghua University. |
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| Keywords: | chiral symmetry heavy-ion collisions transport theory quantum effect |
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