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首页> 外文期刊>The journal of high energy physics >Constraint algebra of general relativity from a formal continuum limit of canonical tensor model
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Constraint algebra of general relativity from a formal continuum limit of canonical tensor model

机译:从规范张量模型的正式连续极限范围内的约束代数

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A bstract Canonical tensor model (CTM for short below) is a rank-three tensor model formulated as a totally constrained system in the canonical formalism. In the classical case, the constraints form a first-class constraint Poisson algebra with structures similar to that of the ADM formalism of general relativity, qualifying CTM as a possible discrete formalism for quantum gravity. In this paper, we show that, in a formal continuum limit, the constraint Poisson algebra of CTM with no cosmological constant exactly reproduces that of the ADM formalism. To this end, we obtain the expression of the metric tensor field in general relativity in terms of one of the dynamical rank-three tensors in CTM, and determine the correspondence between the constraints of CTM and those of the ADM formalism. On the other hand, the cosmological constant term of CTM seems to induce non-local dynamics, and is inconsistent with an assumption about locality of the continuum limit.
机译:Bstract规范张量模型(下面短的CTM)是在规范形式主义中作为完全受约束的系统配制的秩三张量模型。在经典的情况下,约束形成具有类似于通用相对性的ADM形式主义的结构的第一类约束泊松代数,限定CTM作为量子重力的可能的离散形式主义。在本文中,我们表明,在正式的连续局限性下,CTM的约束泊松代数,没有宇宙学不变,完全可再现了ADM形式主义的。为此,我们在CTM中的动态秩三个张量之一中获得公制张传导场的表达式,并确定CTM的约束与ADM形式主义之间的对应关系。另一方面,CTM的宇宙学常数项似乎诱导非局部动态,并且与关于连续限制的局部性的假设不一致。

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