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- W2034690060 abstract "Recently Gambini and Pullin proposed a new consistent discrete approach to quantum gravity and applied it to cosmological models. One remarkable result of this approach is that the cosmological singularity can be avoided in a general fashion. However, whether the continuum limit of such discretized theories exists is model dependent. In the case of massless scalar field coupled to gravity with Λ=0, the continuum limit can only be achieved by fine tuning the recurrence constant. We regard this failure as the implication that cosmological constant should vary with time. For this reason we replace the massless scalar field by Chaplygin gas which may contribute an effective cosmological constant term with the evolution of the universe. It turns out that the continuum limit can indeed be reached in this case." @default.
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- W2034690060 date "2005-01-30" @default.
- W2034690060 modified "2023-10-16" @default.
- W2034690060 title "DISCRETE GRAVITY AND ITS CONTINUUM LIMIT" @default.
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- W2034690060 doi "https://doi.org/10.1142/s0217732305015793" @default.
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