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ON THE CHEMICAL POTENTIAL OF DARK ENERGY

By S. H. Pereira

Abstract

It is widely assumed that the observed universe is accelerating due to the existence of a new fluid component called dark energy. In this article, the thermodynamics consequences of a nonzero chemical potential on the dark energy component is discussed with special emphasis to the phantom fluid case. It is found that if the dark energy fluid is endowed with a negative chemical potential, the phantom field hypothesis becomes thermodynamically consistent with no need of negative temperatures as recently assumed in the literature.

OAI identifier: oai:CiteSeerX.psu:10.1.1.311.2568
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