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arXiv 0709.0095hep-th
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4D-Moyal空间上的8D谱三元组与非对易规范理论的真空

8D-spectral triple on 4D-Moyal space and the vacuum of noncommutative gauge theory

Harald Grosse, Raimar Wulkenhaar

摘要:

通过观察四维Moyal空间A上可重整化标量场理论的哈密顿量是谱维为8的Dirac算子D的平方,我们将(A,D)完备化为一个紧的8维谱三元组.我们增加了另一个Connes-Lott拷贝,并计算了相应的U(1)-Yang-Mills-Higgs模型的谱作用量.我们发现,在Higgs势中,Higgs场的平方π ^2移动到π * π + const X_μ* X^μ,其中X_μ是协变坐标。我们模型的经典场方程意味着真空不再是由恒定的希格斯场给出的,但希格斯场和规范场都接收非恒定的真空期望值。

英文摘要:

Observing that the Hamiltonian of the renormalisable scalar field theory on 4-dimensional Moyal space A is the square of a Dirac operator D of spectral dimension 8, we complete (A,D) to a compact 8-dimensional spectral triple. We add another Connes-Lott copy and compute the spectral action of the corresponding U(1)-Yang-Mills-Higgs model. We find that in the Higgs potential the square ϕ^2 of the Higgs field is shifted to ϕ* ϕ+ const X_μ* X^μ, where X_μis the covariant coordinate. The classical field equations of our model imply that the vacuum is no longer given by a constant Higgs field, but both the Higgs and gauge fields receive non-constant vacuum expectation values.

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