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Cosmological Bardeen-Cooper-Schrieffer condensate as dark energy

We argue that the occurrence of late-time acceleration can conveniently be described by first-order general relativity covariantly coupled to fermions. Dark energy arises as a Bardeen-Cooper-Schrieffer condensate of fermions which forms in the early universe. At late times, the gap and chemical potential evolve to have an equation of state with effective negative pressure, thus naturally leading to acceleration.

preprint2010arXivOpen access
Stephon AlexanderTirthabir BiswasGianluca Calcagni
astro-ph.COgr-qchep-th
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Stephon AlexanderTirthabir BiswasGianluca Calcagni

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