Time arrow is influenced by the dark energy.
The arrow of time and the accelerated expansion are two fundamental empirical facts of the universe. We advance the viewpoint that the dark energy (positive cosmological constant) accelerating the expansion of the universe also supports the time asymmetry. It is related to the decay of metastable states under generic perturbations, as we show on example of a microcanonical ensemble. These states will not be metastable without dark energy. The latter also ensures a hyperbolic motion leading to dynamic entropy production with the rate determined by the cosmological constant.
Department of Theoretical Physics and Center for Cosmology and Astrophysics, Yerevan Physics Institute, Yerevan 0036, Armenia.
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Allahverdyan
Department of Theoretical Physics and Center for Cosmology and Astrophysics, Yerevan Physics Institute, Yerevan 0036, Armenia.|Center for Cosmology and Astrophysics, Yerevan State University, Yerevan 0025, Armenia.|SIA, Sapienza University of Rome, Rome I-00185, Italy.
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Gurzadyan