论文标题
改进的全息淋巴结线半学
An improved holographic nodal line semimetal
论文作者
论文摘要
我们研究了强烈耦合的节点线半学的改进的全息模型，该模型满足等级两个张量操作员$ \ bar单ψγ^{μν}ψ$和$ \ bar单ψγ^{μν}γ^5ψ$。我们为复杂的两种形式字段的批量介绍了Chern-Simons项和质量项，该字段对上述张量操作员是双重的，并且双重关系从全息图中自动满足。我们发现存在从拓扑结节线半学相的量子相变为微不足道的相。在拓扑阶段，在拓扑范围内存在多个节点线，它们在拓扑上是非平凡的。散装几何形状与前一个模型不同，而没有二元性约束，而所产生的属性在质量上与该模型中的属性相似。这种改进的模型为分析强耦合节点线半度的运输或其他特性提供了更自然的基础。
We study an improved holographic model for the strongly coupled nodal line semimetal which satisfies the duality relation between the rank two tensor operators $\barψγ^{μν}ψ$ and $\barψγ^{μν}γ^5ψ$. We introduce a Chern-Simons term and a mass term in the bulk for a complex two form field which is dual to the above tensor operators and the duality relation is automatically satisfied from holography. We find that there exists a quantum phase transition from a topological nodal line semimetal phase to a trivial phase. In the topological phase, there exist multiple nodal lines in the fermionic spectrum which are topologically nontrivial. The bulk geometries are different from the previous model without the duality constraint, while the resulting properties are qualitatively similar to those in that model. This improved model provides a more natural ground to analyze transports or other properties of strongly coupled nodal line semimetals.
