Cosmology with Negative Absolute Temperatures

@article{Vieira2016CosmologyWN,
  title={Cosmology with Negative Absolute Temperatures},
  author={J. P. P. Vieira and Christian T. Byrnes and Antony Lewis},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},
  year={2016}
}
Negative absolute temperatures (NAT) are an exotic thermodynamical consequence of quantum physics which has been known since the 1950's (having been achieved in the lab on a number of occasions). Recently, the work of Braun et al (2013) has rekindled interest in negative temperatures and hinted at a possibility of using NAT systems in the lab as dark energy analogues. This paper goes one step further, looking into the cosmological consequences of the existence of a NAT component in the Universe… 
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