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Steady-state eternal inflation
Physical Review D, 2002 Since the advent of inflation, several theorems have been proven suggesting that although inflation can (and generically does) continue eternally into the future, it cannot be extended eternally into the past to create a ``steady-state'' model with no initial time.
Aguirre, Anthony, Gratton, Steven
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Eternal inflation in swampy landscapes [PDF]
Journal of Cosmology and Astroparticle Physics, 2020 The much-discussed swampland conjectures suggest significant constraints on the properties of string theory landscape and on the nature of the multiverse that this landscape can support. The conjectures are especially constraining for models of inflation; in particular, they exclude the existence of de Sitter (dS) vacua.
Blanco-Pillado, Jose J. +2 more
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Time-dependent quantum correlations in two-dimensional expanding spacetime
European Physical Journal C: Particles and Fields, 2021 In expanding universes, the entanglement entropy must be time-dependent because the background geometry changes with time. For understanding time evolution of quantum correlations, we take into account two distinct holographic models, the dS boundary ...
Chanyong Park
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Journal of High Energy Physics, 2020 We show how in a matrix inflationary model in which there is a non-minimal coupling between the matrix inflatons and gravity — hence dubbed Non-M-flation — some of the disadvantages of the minimal model can be avoided.
Amjad Ashoorioon, Kazem Rezazadeh
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De Sitter diagrammar and the resummation of time
Journal of High Energy Physics, 2020 Light scalars in inflationary spacetimes suffer from logarithmic infrared divergences at every order in perturbation theory. This corresponds to the scalar field values in different Hubble patches undergoing a random walk of quantum fluctuations, leading
Matthew Baumgart, Raman Sundrum
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De Sitter quantum breaking, swampland conjectures and thermal strings
Journal of High Energy Physics, 2021 We argue that under certain assumptions the quantum break time approach and the trans-Planckian censorship conjecture both lead to de Sitter swampland constraints of the same functional form.
Ralph Blumenhagen +2 more
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Mathematical issues in eternal inflation [PDF]
Classical and Quantum Gravity, 2015 In this paper, we consider the problem of existence and uniqueness of solutions to the Einstein field equations for a spatially flat FLRW universe in the context of stochastic eternal inflation where the stochastic mechanism is modelled by adding a stochastic forcing term representing Gaussian white noise to the Klein-Gordon equation.
Kohli, Ikjyot Singh, Haslam, Michael C.
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Geodesic measures of the landscape [PDF]
, 2006 We study the landscape models of eternal inflation with an arbitrary number of different vacua states, both recyclable and terminal. We calculate the abundances of bubbles following different geodesics. We show that the results obtained from generic time-
P. Lancaster, Vitaly Vanchurin
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Axion landscape and natural inflation
Physics Letters B, 2015 Multiple axions form a landscape in the presence of various shift symmetry breaking terms. Eternal inflation populates the axion landscape, continuously creating new universes by bubble nucleation.
Tetsutaro Higaki, Fuminobu Takahashi
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Sliding naturalness: cosmological selection of the weak scale
Journal of High Energy Physics, 2022 We present a cosmological solution to the electroweak hierarchy problem. After discussing general features of cosmological approaches to naturalness, we extend the Standard Model with two light scalars very weakly coupled to the Higgs and present the ...
Raffaele Tito D’Agnolo, Daniele Teresi
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