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arXiv 0910.2498gr-qcmath-phmath.MP
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作为离散相时空的因果集

Causal set as a discretized phase spacetime

Roman Sverdlov

摘要:

本文的第一个目标是表明,离散性,局部性和相对论协变性可以和平共存,如果普通时空(OST)被替换为相时空(PST)作为泊松过程的几何背景,其中PST是相空间概念的时空推广(这是Caianiello提出的8维结构的7维版本)。此外,Caianiello的有限加速度的想法是实施。在此之后,本文接着推广的几何概念,从PST的直觉到一般的离散因果集,没有任何几何背景。然后,它利用光锥奇点的缺乏,试图解决PST类因果集的定义;也就是说,一个离散系统,近似的几何性质,我们会期望从连续PST。最后,本文着手介绍量子场论的因果集,并表明,从OST到PST切换获得的局部性使我们更接近能够处理量子场论的因果集解析,而不是数字。

英文摘要:

The first goal of this paper is to show that discreteness, locality, and relativistic covariance can peacefully coexist if the ordinary spacetime (OST) is replaced with phase spacetime (PST) as a geometric background of a Poisson process, where PST is a spacetime generalization of a notion of phase space (this is a 7-dimensional version of the 8-dimensional structure proposed by Caianiello). Furthermore, Caianiello's idea of finite acceleration is implemented. After this is done, the paper then goes on to generalize the geometric notions obtained from the intuition of PST to a general discrete causal set, without any geometric background. It then takes advantage of the absence of lightcone singularity to attempt to tackle the definition of PST-like causal set; that is, a discrete system that approximates the geometrical properties that we would expect from continuum PST. Finally, the paper proceeds to introduce quantum field theory on a causal set, and shows that the locality gained by switching from OST to PST brings us one step closer to be able to treat quantum field theory on a causal set analytically rather than numerically.

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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