bouncing cosmology 1cosmological singularity 1ghost-free 1infinite derivative gravity 1tachyon instability 1tensor perturbations 1
From the 1 of 2 linked papers with an AI index.
2 papers
gr-qc2026
Is there ghost and tachyon free bounce in UV complete gravity theory?
Hao Hu, Alexey S. Koshelev, Abhishek Naskar
The paper investigates whether analytic infinite‑derivative gravity can produce a non‑singular bouncing universe without ghost or tachyon instabilities, finding that a negative cos…
gr-qc2025
Cosmic inflation in non-perturbative quantum gravity
Alexey S. Koshelev, Abhishek Naskar
String field theory motivated infinite-derivative models lead to non-local gravity modifications which form a promising class of quantum gravity candidates. In this paper we invest…