#causalsettheory — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #causalsettheory, aggregated by home.social.
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"The path to quantum gravity with causal sets"
A two day conference on recent developments in the causal set approach to quantum gravity.
Where? Manchester, UK
When? 07 - 08 September 2026
Organised by Stav Zalel and Yasaman Yazdi, hosted by the Royal SocietyYou may still request an invitation on their website.
https://royalsociety.org/science-events-and-lectures/2026/09/path-to-quantum-gravity/
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A while ago I shared a #paperOfTheDay about #causalSetTheory , a combinatorial approach to #quantum #gravity , that caught some interest. For researchers interested to learn more or even collaborate, there is now a #scientificConference in September 2026, organized by @ykyazdi . It takes place in-person in Manchester, UK, free of charge, and registration is open now (and manually approved by the organizers, as usual for this type of specialized meetings). #mathematics #physics #causet
https://royalsociety.org/science-events-and-lectures/2026/09/path-to-quantum-gravity/ -
As is well known, the Einstein-Hilbert action of general #relativity, i.e. Einstein #Gravity, can not be "simply" turned into a #quantumFieldTheory in the usual perturbative way. Over the decades, this has given rise to dozens of proposed solutions, either by modifying the Einstein-Hilbert action (e.g. introducing a fourth derivative term), or by modifying quantum field theory (e.g. replace it by #stringTheory ), or by examining the possibility for fully non-perturbative quantum field theory (e.g. #asymptoticSafety studies via functional renormalization).
One of the approaches that somehow combines the first and second viewpoint is #causalSetTheory . There, one assumes that spacetime is fundamentally discrete, not like a lattice, but more like a random #graph and the edges in this graph represent causal relations (i.e. being in the future or past light cone). Viewed from afar, this might look like a 4-dimensional spacetime, but looked closely, there is only discrete structure. The edges (causal connections) do not only join nearest neighbours, but can reach far along the lightcone, this gives rise to non-trivial effects, and it makes it surprisingly hard to simulate such a causal set (I've tried that once, but without much success).
The causal sets community has produced a 1 hour video to explain these concepts to a general audience interested in #physics
https://www.youtube.com/watch?v=5EoZE1rOHAo -
"Ob der Weg zu einer möglichen Theorie der #Quantengravitation gerade sein wird, oder sprunghaft, wird sich erst weisen"
Spannend, aktuell und erstaunlich gut erklärt von Reinhard #Kleindl
#Relativitätstheorie #RicciKrümmung #CausalSetTheory #Raumzeit
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"Ob der Weg zu einer möglichen Theorie der #Quantengravitation gerade sein wird, oder sprunghaft, wird sich erst weisen"
Spannend, aktuell und erstaunlich gut erklärt von Reinhard #Kleindl
#Relativitätstheorie #RicciKrümmung #CausalSetTheory #Raumzeit
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"Ob der Weg zu einer möglichen Theorie der #Quantengravitation gerade sein wird, oder sprunghaft, wird sich erst weisen"
Spannend, aktuell und erstaunlich gut erklärt von Reinhard #Kleindl
#Relativitätstheorie #RicciKrümmung #CausalSetTheory #Raumzeit
-
"Ob der Weg zu einer möglichen Theorie der #Quantengravitation gerade sein wird, oder sprunghaft, wird sich erst weisen"
Spannend, aktuell und erstaunlich gut erklärt von Reinhard #Kleindl
#Relativitätstheorie #RicciKrümmung #CausalSetTheory #Raumzeit