密度、短程有序和夸克-胶子等离子体
Density, short-range order and the quark-gluon plasma
摘要：
研究了夸克-胶子等离子体中能量密度空间相关器的热部分。我们描述了它在高温下的定性形式。然后我们计算出距离近似。在SU（3）规范理论格点模拟中，当温度为0.9<= T/T_c<= 2.2时，T_c = 1.5/T。减真空相关器表现出非单调的行为，几乎是共形的2T_c。其最大值约为r。0.6/T表明一种致密介质，只有弱的短程有序，类似于接近液-气相变的非相对论流体，其中eta/s最小。
英文摘要：
We study the thermal part of the energy density spatial correlator in the quark-gluon plasma. We describe its qualitative form at high temperatures. We then calculate it out to distances approx. 1.5/T in SU(3) gauge theory lattice simulations for the range of temperatures 0.9<= T/T_c<= 2.2. The vacuum-subtracted correlator exhibits non-monotonic behavior, and is almost conformal by 2T_c. Its broad maximum at r approx. 0.6/T suggests a dense medium with only weak short-range order, similar to a non-relativistic fluid near the liquid-gas phase transition, where eta/s is minimal.
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