Some remarks on the attractor behaviour in ELKO cosmology

Recent results on the dynamical stability of a system involving the interaction of the ELKO spinor field with standard matter in the universe have been reanalysed, and the conclusion is that such system does not exhibit isolated stable points that could alleviate the cosmic coincidence problem. When a constant parameter $\delta$ related to the potential of the ELKO field is introduced in the system however, stable fixed points are found for some specific types of interaction between the ELKO field and matter. Although the parameter $\delta$ is related to an unknown potential, in order to satisfy the stability conditions and also that the fixed points are real, the range of the constant parameter $\delta$ can be constrained for the present time and the coincidence problem can be alleviated for some specific interactions. Such restriction on the ELKO potential opens possibility to apply the ELKO field as a candidate to dark energy in the universe, and so explain the present phase of acceleration of the universe through the decay of the ELKO field into matter.Comment: 17 pages, section III with minor changes and section IV rewritten with a new analysi

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Text of the comments prepared by University President Peter S. Hoff for the 2000 Annual New Academic Year press conference

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Text of remarks prepared by Peter S. Hoff for the State of the University, October 8, 2002

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Text of University President Peter Hoff\u27s comments to the campus community following the events of September 11, 200

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Text of the testimony of Peter Hoff to the Joint Committee on Appropriations and Financial Affair

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Text of the inaugural address of Peter S. Hoff

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Text of remarks prepared by Peter S. Hoff for the State of the University, October 1, 2003