Rapidly descending dark energy and the end of cosmic expansion

  title={Rapidly descending dark energy and the end of cosmic expansion},
  author={Cosmina Andrei and Anna Ijjas and Paul J. Steinhardt},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
Significance Although the universe is expanding at an accelerating rate today, this paper presents a simple mechanism by which a dynamical form of dark energy (known as quintessence) could cause the acceleration to come to end and smoothly transition from expansion to a phase of slow contraction. That raises questions, How soon could this transition occur? And at what point would it be detectable? The conclusions are that the transition could be surprisingly soon, maybe less than 100 million y… 
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