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- W3207630077 abstract "In this paper, we consider a quantum mechanical system to model the effect of quantum fields on the evolution of the early universe. The system consists of an inverted oscillator bilinearly coupled to a set of harmonic oscillators. We point out that the role of noise may be crucial in the dynamics of the oscillator, which is analyzed using the theory of harmonic oscillators with random frequency. Using this analogy, we argue that due to the fluctuations around its mean value, a positive vacuum energy density would not produce an exponentially expanding but an oscillating universe, in the same fashion that an inverted pendulum is stabilized by random oscillations of the suspension point (stochastic Kapitza pendulum). The results emphasize the relevance of noise in the evolution of the scale factor." @default.
- W3207630077 created "2021-10-25" @default.
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- W3207630077 date "2021-10-15" @default.
- W3207630077 modified "2023-10-09" @default.
- W3207630077 title "The role of noise in the early universe" @default.
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- W3207630077 doi "https://doi.org/10.1142/s0218271821501170" @default.
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