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arXiv 2305.06136hep-thgr-qcmath-phmath.MP
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具有张量与局域自由度的量子场论:来自泛函重整化的相结构

QFT with Tensorial and Local Degrees of Freedom: Phase Structure from Functional Renormalization

Joseph Ben Geloun, Andreas G. A. Pithis, Johannes Thürigen

AI总结:

针对循环瓜形势近似下张量场论无法形成连续几何凝聚相的问题,本文引入ℝ^d局域自由度,利用泛函重整化群证明d>2时可出现允许相变的相结构。

摘要:

具有诸如张量不变量之类组合非局域相互作用的场论,是描述从离散量子引力几何到连续体几何相变的有趣候选者。在r维环面上张量场论所谓的循环瓜形势近似中,近期利用泛函重整化群技术表明,不可能发生向具有试探性连续体几何解释的凝聚相的此类相变。本文在保持相同近似的情况下,展示了如何通过在ℝ^d上为理论补充局域自由度来克服这一局限。我们发现,沿重整化群流,环面部分的有效r−1维会动态消失,而d个局域维度则持续到小动量尺度。因此,当d>2时,可以发现一种也允许相变存在的相结构。

英文摘要:

Field theories with combinatorial non-local interactions such as tensor invariants are interesting candidates for describing a phase transition from discrete quantum-gravitational to continuum geometry. In the so-called cyclic-melonic potential approximation of a tensorial field theory on the $r$-dimensional torus it was recently shown using functional renormalization group techniques that no such phase transition to a condensate phase with a tentative continuum geometric interpretation is possible. Here, keeping the same approximation, we show how to overcome this limitation amending the theory by local degrees freedom on $\mathbb{R}^d$. We find that the effective $r-1$ dimensions of the torus part dynamically vanish along the renormalization group flow while the $d$ local dimensions persist up to small momentum scales. Consequently, for $d>2$ one can find a phase structure allowing also for phase transitions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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