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arXiv 0908.3711hep-ph
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NJL型模型中手征临界点附近的非均匀相

Inhomogeneous phases near the chiral critical point in NJL-type models

Dominik Nickel

摘要:

在这次演讲中,我们讨论了非均匀相在Nambu-Jona-Lasinio(NJL)和夸克介子(QM)模型相图中的作用。通过广义Ginzburg-Landau(GL)展开,得出NJL模型平均场相图中的临界点实际上是均匀自发破缺相、非均匀自发破缺相和恢复相交汇的Lifshitz点的结论.这张照片证实了平均场计算的非均匀相位与一维调制。对于后者,它表明,最近的结果在低维模型可以扩展到3+1维。还提出了相应的相图QM模型。

英文摘要:

In this talk we discuss the role of inhomogeneous phases in the phase diagram of the Nambu-Jona-Lasinio (NJL) and the quark meson (QM) model. By means of a generalized Ginzburg-Landau (GL) expansion it is concluded that the critical point in the mean-field phase diagram of the NJL model is in fact a Lifshitz point where homogeneous spontaneously broken, inhomogeneous and restored phases meet. This picture is confirmed by a mean-field calculation for inhomogeneous phases with a one-dimensional modulation. For the latter it is shown that recent results within lower dimensional models can be extended to 3+1 dimensions. Also the respective phase diagram for the QM model is presented.

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