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this post was submitted on 15 Jul 2023
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In another paper on the arxiv, the author uses time-varying fundamental constants (c, h, k~B~) and relates them to a time-dependent Newton coupling, and calls this "varying coupling constants". Can you say whether the author also has time-varying fundamental constants in this paper, or only a time-varying cosmological constant? The language in the abstract makes it sound like multiple "coupling constants", but you only mention Λ, if I'm not missing anything.
Covarying coupling constants is an established name, so it’s used as is. But the paper only mentions lambda, as far as I remember. There might be something else used in the equations, I haven’t delved deep into those, but nothing else should really be required for this particular discussion.