Overview of a Big Rip Theory

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The hypothesis relies crucially on the type of dark energy in the universe. The type that could cause this hypothesis is a constantly increasing form of dark energy. If the dark energy in the universe increases without limit, it could overcome all forces that hold the universe together. The key value[why?] is the equation of state parameter w, the ratio between the dark energy pressure and its energy density. If w < −1, this dynamical vacuum energy is known as phantom energy, an extreme[how?] form of quintessence.

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