Journal of East China Normal University(Natural Science) ›› 2020, Vol. 2020 ›› Issue (2): 83-89.doi: 10.3969/j.issn.1000-5641.201922011

• Physics and Electronics • Previous Articles     Next Articles

Lorentz symmetry violation and accelerated expansion of the universe

ZHAI Hanyu1, XUE Xun1,2   

  1. 1. School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China;
    2. Center for Theoretical Physics, Xinjiang University, Urumqi 830046, China
  • Received:2019-04-23 Published:2020-03-16

Abstract: The supernova observations of 1998 show that the universe is accelerating and expanding. Dark energy refers to the cosmic content of the universe's accelerated expansion. The positive cosmological constant Λ is an important factor for dark energy, but the cause of the accelerated expansion of the universe is not Λ. Lorentz invariance is the most accurate symmetry in nature, but all quantum gravitational theories predict the breakup of Lorentz symmetry. Based on the cosmological model of a large-scale Lorentz violation(LSLV), the Friedmann equation modified by effective gravitational theory is discussed and the effect of a large-scale Lorentz violation combined with a cosmological constant term can produce the observed acceleration of the universe.

Key words: accelerating expansion of the universe, Lorentz violation, dark energy

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