Lorentz symmetry violation and accelerated expansion of the universe

doi:10.3969/j.issn.1000-5641.201922011

Abstract

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

CLC Number:

O413.4

ZHAI Hanyu, XUE Xun. Lorentz symmetry violation and accelerated expansion of the universe[J]. Journal of East China Normal University(Natural Science), 2020, 2020(2): 83-89.

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