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Barenboim Szuchman, Gabriela Alejandra; Mena Requejo, Olga; Quigg, Chris | |||
Aquest document és un/a article, creat/da en: 2006 | |||
Este documento está disponible también en : 10.1088/1475-7516/2006/04/008 |
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In an undulant universe, cosmic expansion is characterized by alternating periods of acceleration and deceleration. We examine cosmologies in which the dark energy equation of state varies periodically with the number of e-foldings of the scale factor of the universe, and use observations to constrain the frequency of oscillation. We find a tension between a forceful response to the cosmic coincidence problem and the standard treatment of structure formation. | |||
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