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A covariant Lagrangian for stable nonsingular bounce
Journal of High Energy Physics, 2017 The nonsingular bounce models usually suffer from the ghost or gradient instabilities, as has been proved recently. In this paper, we propose a covariant effective theory for stable nonsingular bounce, which has the quadratic order of the second order ...
Yong Cai
exaly +3 more sources
Integrable cosmological models with non-minimal coupling and bounce solutions
EPJ Web of Conferences, 2016 We remind the way to obtain integrable models with non-minimally coupled scalar fields. We are interesting to models with bounce solutions and compare bounce solutions in two known integrable models. We show that only one model has a bounce solution that
Pozdeeva Ekaterina, Vernov Sergey
doaj +3 more sources
Convening Transformation Systems to Achieve System Transformation
Journal of Awareness-Based Systems Change, 2022 Transformation (T-) systems are innovative collections of initiatives and efforts geared to bringing about a flourishing socio-ecological system in a given context.
Sandra Waddock +3 more
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Bounce Universe with Finite-Time Singularity
Universe, 2022 This work explains how the presence of a Type-IV singularity (a mild singularity) can influence the dynamics of a bouncing universe. In particular, we examine the bounce cosmology that appears with a Type-IV singularity in the context of a ghost-free ...
Sergei D. Odintsov, Tanmoy Paul
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Groove Fields. Understanding the Dance Floor from an Art-Based Research Perspective
Geography Notebooks, 2021 This contribution examines groove dynamics across various spatial contexts such as the dance club and the artistic performance space. As groove dynamics do not occur in a spatial vacuum but are embedded in affective environments, they need to be ...
Sebastian Matthias
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Loop Quantum Cosmological Model From ADM Hamiltonian
Frontiers in Astronomy and Space Sciences, 2022 The loop quantum cosmological model from ADM Hamiltonian is studied in this article. We consider the spatially flat homogeneous FRW model. It turns out that the modified Friedmann equation keeps the same form as the APS LQC model.
You Ding, Xiangdong Zhang
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An Overview on the Nature of the Bounce in LQC and PQM
Universe, 2021 We present a review on some of the basic aspects concerning quantum cosmology in the presence of cut-off physics as it has emerged in the literature during the last fifteen years.
Gabriele Barca +2 more
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Universe, 2021 The goal of this contribution is to present the properties of a class of quantum bouncing models in which the quantum bounce originates from the Dirac canonical quantization of a midi-superspace model composed of a homogeneous and isotropic background ...
Nelson Pinto-Neto
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Stability of a Viable Non-Minimal Bounce
Universe, 2021 The main difficulties in constructing a viable early Universe bouncing model are: to bypass the observational and theoretical no-go theorem, to construct a stable non-singular bouncing phase, and perhaps, the major concern of it is to construct a stable ...
Debottam Nandi
doaj +1 more source
Towards Cosmological Dynamics from Loop Quantum Gravity [PDF]
, 2018 We present a systematic study of the cosmological dynamics resulting from an effective Hamiltonian, recently derived in loop quantum gravity using Thiemann's regularization and earlier obtained in loop quantum cosmology (LQC) by keeping the Lorentzian ...
Li, Bao-Fei +2 more
core +3 more sources