中文摘要：

应用格点QCD理论对电荷涨落和夸克数密度敏感性进行了研究．研究选取了两个轻味夸克，应用8taggered作用量，并选取了16×8^2×4格点．对电荷涨落和夸克数密度敏感性在y=（2a）^3-（8a）^3（这里a=1/4T）区间进行了数值计算．结果显示，在相变温度以下的区域内，上述参数对体积V具有依赖性，这表明了可以通过对上述参数的研究来确定强子的尺度．在高于相变温度的区域内，对体积V没有表现出依赖性。

英文摘要：

We measured charge fluctuation and fermion number density susceptibility using lattice QCD with two light flavors of staggered quarks on 16 × 8^2× 4 lattice. Below the critical temperature, we simulated them with the sub-volume for V = （2a）^3 - （8a）^3, where a = （a=1/4T）. We tind that new aspect is observation of volume dependence in the fluctuations. The charge fluctuation and fermion number density susceptibility vary with the volume for V. This suggests the existence of hadronic length scale in the charge fluctuation and fermion number density susceptibility. Above critical temperature, charge fluctuation and fermion number density susceptibility are almost volume independent for V ≥（2a）^3.