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arxiv: 1403.3961 · v2 · pith:EHWW65A5new · submitted 2014-03-16 · 🌌 astro-ph.CO · gr-qc· hep-th

Cosmology with Mimetic Matter

classification 🌌 astro-ph.CO gr-qchep-th
keywords mimeticmatterperturbationsscalarbehaviourbouncingconsidercosmological
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We consider minimal extensions of the recently proposed Mimetic Dark Matter and show that by introducing a potential for the mimetic non-dynamical scalar field we can mimic nearly any gravitational properties of the normal matter. In particular, the mimetic matter can provide us with inflaton, quintessence and even can lead to a bouncing nonsingular universe. We also investigate the behaviour of cosmological perturbations due to a mimetic matter. We demonstrate that simple mimetic inflation can produce red-tilted scalar perturbations which are largely enhanced over gravity waves.

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