Extending the IceCube search for neutrino point sources in the Northern sky with additional years of data
ArXiv 2308.12742 (2023)
Kination, Meet Kasner: On The Asymptotic Cosmology of String Compactifications
JHEP 08 (2023) 156
Abstract:
We study runaway, kination-dominated epochs in string cosmology. We show how the apparent classical decompactification runaway of the volume modulus, described by a kination epoch in the 4-dimensional EFT, can be uplifted to a classical Kasner solution in 10d in which the non-compact dimensions collapse towards a Big Crunch. We study this for both single-modulus and multi-modulus examples. We also study related behaviour for compactifications to d≠3 space dimensions, finding an interesting singling out of d=3. We conclude with some comments on how this picture is modified by quantum effects, and the need for both dynamical and kinematical Swampland constraints.
Kination, meet Kasner: on the asymptotic cosmology of string compactifications
Journal of High Energy Physics Springer 2023:8 (2023) 156
Abstract:
We study runaway, kination-dominated epochs in string cosmology. We show how the apparent classical decompactification runaway of the volume modulus, described by a kination epoch in the 4-dimensional EFT, can be uplifted to a classical Kasner solution in 10d in which the non-compact dimensions collapse towards a Big Crunch. This can also be generalised for arbitrary spacetime and compactification dimensions. We conclude with some comments on how this picture is modified by quantum effects, and the need for both dynamical and kinematical Swampland constraints.Precision Prognostics for Cardiovascular Disease in Type 2 Diabetes: A Systematic Review and Meta-analysis.
(2023)