Weyl fermion creation by cosmological gravitational wave background at 1-loop by Azadeh Maleknejad, Joachim Kopp

“…In this paper, we present an extended study of this new mechanism, explicitly computing this effect using the in-in formalism. We work in an expanding Universe in the radiation-dominated era as a fixed background. …”
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Dynamics of Mixed Dark Energy Domination in Teleparallel Gravity and Phase-Space Analysis by Emre Dil, Erdinç Kolay

“…We consider a novel dark energy model to investigate whether it will provide an expanding universe phase. Here we propose a mixed dark energy domination which is constituted by tachyon, quintessence, and phantom scalar fields nonminimally coupled to gravity, in the absence of background dark matter and baryonic matter, in the framework of teleparallel gravity. …”
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Thermodynamics of the FRW Universe at the Event Horizon in Palatini f(R) Gravity by A. S. Sefiedgar, M. Mirzazadeh

“…In an accelerated expanding universe, one can expect the existence of an event horizon. …”
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Wigner function method for the Gibbons–Hawking and the Unruh effect by Landau, Ziv, Leonhardt, Ulf

“…An observer at rest with the expanding universe experiences some extra noise in the quantum vacuum, and so does an accelerated observer in a vacuum at rest (in Minkowski space). …”
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Constraints on the Dark Side of the Universe and Observational Hubble Parameter Data by Tong-Jie Zhang, Cong Ma, Tian Lan

“…Starting with fundamental cosmological notions such as the spacetime coordinates in an expanding universe, we present the basic principles behind the two methods. …”
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Fermionic steering in multi-event horizon spacetime by Shu-Min Wu, Jin-Xuan Li, Yu-Xuan Wang, Si-Han Shang, Jianbo Lu

“…However, the Hawking effect of the expanding universe can enhance fermionic steerability, which differs from the properties of quantum steering in single-event horizon spacetime. …”
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Cosmic Rays Report from the Structure of Space by A. Annila

“…Above 1015.6 eV the flux from the expanding Universe diminishes below the flux from the nearby nonexpanding part of the Universe. …”
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Optomechanical Backreaction of Quantum Field Processes in Dynamical Casimir Effect by Xie, Yu-Cun, Butera, Salvatore, Hu, Bei-Lok

“…Dynamical Casimir effect (DCE) and cosmological particle creation (CPC) share the same underlying physical mechanism, that of parametric amplification of vacuum fluctuations in the quantum field by an expanding universe or by a fast moving boundary. Backreaction of cosmological particle creation at the Planck time has been shown to play a significant role in the isotropization and homogenization of the early universe. …”
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The Natural Science Underlying Big History by Eric J. Chaisson

“…Energy is a principal facilitator of the rising complexity of ordered systems within the expanding Universe; energy flows are as central to life and society as they are to stars and galaxies. …”
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