The phase diagram of a gauge theory with fermionic baryons
The phase diagram of a gauge theory with fermionic baryons
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费米子重子规范理论的相图
DOI：
10.1103/physrevd.86.111901
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发表时间：
2012
影响因子：
5
通讯作者：
A. Wipf
中科院分区：
文献类型：
--
作者：
A. Maas;L. von Smekal;B. Wellegehausen;A. Wipf
有限密度下的费米子符号问题是蒙特卡罗模拟的一个长期挑战。没有符号问题的理论可以为物理上更相关的理论提供有价值的指导和见解。例如，将QCD的量规群SU(3)替换为例外群，就产生了这样的理论。它既有介子，也有玻色子和费米子重子，并且与QCD有许多共同的特征。这使得规范理论非常适合研究密集、强相互作用物质的一般性质，包括重子和核费米压力效应。在这里，我们首次提出了用动态费米子对qcd进行晶格模拟的结果，提供了在有限温度和重子化学势下这种类qcd理论的相图的第一次探索性观察。
The fermion-sign problem at finite density is a persisting challenge for Monte Carlo simulations. Theories that do not have a sign problem can provide valuable guidance and insight for physically more relevant ones that do. Replacing the gauge group SU(3) of QCD by the exceptional group, for example, leads to such a theory. It has mesons as well as bosonic and fermionic baryons, and shares many features with QCD. This makes thegauge theory ideally suited to study general properties of dense, strongly interacting matter, including baryonic and nuclear Fermi pressure effects. Here we present the first-ever results from lattice simulations ofQCD with dynamical fermions, providing a first explorative look at the phase diagram of this QCD-like theory at finite temperature and baryon chemical potential.