Vesmír nikdy nevznikl, je věčný, říká nová teorie kvantové gravitace
Existují dvě mimořádně účinné teorie vykládající vesmír: kvantová fyzika a obecná relativita. Kvantová fyzika dokázala úspěšně popsat tři ze ...
arXiv
Jak tedy bez singularity velkého třesku vypadá začátek našeho vesmíru? Podle práce, kterou Bento a jeho spolupracovník Stav Zalel, postgraduální student Královské univerzity v Londýně, publikovali 24. září na předtiskovém serveru <anchor>arXiv</anchor> (tedy internetovém úložišti vědeckých prací, jež zatím nebyly otištěny v recenzovaném vědeckém časopise), je možné ptát se, zda v kauzálním množinovém přístupu musí nějaký začátek vůbec být.
[2109.11953] If time had no beginning
\[2109.11953\] If time had no beginning

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# General Relativity and Quantum Cosmology

**arXiv:2109.11953** (gr-qc)


\[Submitted on 24 Sep 2021\]

# Title:If time had no beginning

Authors: [Bruno Valeixo Bento](https://arxiv.org/search/gr-qc?searchtype=author&query=Bento,+B+V), [Stav Zalel](https://arxiv.org/search/gr-qc?searchtype=author&query=Zalel,+S)

View a PDF of the paper titled If time had no beginning, by Bruno Valeixo Bento and 1 other authors

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> Abstract:General Relativity traces the evolution of our Universe back to a Big Bang singularity. To probe physics before the singularity -- if indeed there is a \`\`before'' -- we must turn to quantum gravity. The Causal Set approach to quantum gravity provides us with a causal structure in the absence of the continuum, thus allowing us to go beyond the Big Bang and consider cosmologies in which time has no beginning. But is a time with no beginning in contradiction with a passage of time? In the Causal Set approach, the passage of time is captured by a process of spacetime growth. We describe how to adapt this process for causal sets in which time has no beginning and discuss the consequences for the nature of time.

Comments:5 pages, 4 figuresSubjects:General Relativity and Quantum Cosmology (gr-qc)Cite as:[arXiv:2109.11953](https://arxiv.org/abs/2109.11953) \[gr-qc\](or [arXiv:2109.11953v1](https://arxiv.org/abs/2109.11953v1) \[gr-qc\] for this version)
[https://doi.org/10.48550/arXiv.2109.11953](https://doi.org/10.48550/arXiv.2109.11953)

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## Submission history

From: Bruno Valeixo Bento \[ [view email](/show-email/74d52bc6/2109.11953)\]

**\[v1\]**
Fri, 24 Sep 2021 13:33:37 UTC (844 KB)

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