论文标题
IR改良软壁ADS/QCD模型中有限同胞化学潜力和温度的QCD相图
QCD phase diagram at finite isospin chemical potential and temperature in an IR-improved soft-wall AdS/QCD model
论文作者
论文摘要
我们研究了PION凝结相位和正常相之间的相变，以及有两个风味的手性相变（$ \ MATHCAL {N} _F = 2 $）IR-改进的软墙ADS/QCD模型，在有限的Isospin Chemical Poiltion势能$μ_i$和温度$ t $中。通过自言自语求解运动方程，我们在$μ_i$和$ t $的平面中获得相图。 Pion冷凝与无质量的Nambu-goldstone玻色子$ M_ {π_1}（T_C，μ_i^C）= 0 $一起出现，这很可能是二阶相变，带有均值的临界指数，小$μ__i$ $ $ $ $ $。当$ t = 0 $时，关键的isospin化学电位近似于真空pion质量$μ_i^c \ of m_0 $。 Pion凝结相存在于拱形区域，手性跨界的边界在三临界点上相交的Pion凝结相。从定性上讲，结果与晶格模拟和模型计算的先前研究非常吻合。
We study the phase transition between pion condensed phase and normal phase, as well as chiral phase transition in a two flavor($\mathcal{N}_f=2$) IR- improved soft-wall AdS/QCD model at finite isospin chemical potential $μ_I$ and temperature $T$. By self-consistently solving the equations of motion, we obtain the phase diagram in the plane of $μ_I$ and $T$. The pion condensation appears together with a massless Nambu-Goldstone boson $m_{π_1}(T_c, μ_I^c)=0$, which is very likely to be a second-order phase transition with mean-field critical exponents in small $μ_I$ region. When $T=0$, the critical isospin chemical potential approximates to vacuum pion mass $μ_I^c \approx m_0$. The pion condensed phase exists in an arched area and the boundary of the chiral crossover intersects the pion condensed phase at a tri-critical point. Qualitatively, the results are in good agreement with previous studies from Lattice simulations and model calculations.
