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Dynamics of generalized tachyon field

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Abstract

We investigate the dynamics of generalized tachyon field in FRW spacetime. We obtain the autonomous dynamical system for the general case. Because the general autonomous dynamical system cannot be solved analytically, we discuss two cases in detail: β=1 and β=2. We find the critical points and study their stability. At these critical points, we also consider the stability of the generalized tachyon field, which is as important as the stability of critical points. The possible final states of the universe are discussed.

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Acknowledgements

This study is supported in part by National Natural Science Foundation of China under Grant No. 11147028, and Hebei Provincial Natural Science Foundation of China under Grant No. A2011201147.

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Correspondence to Rongjia Yang.

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Yang, R., Qi, J. Dynamics of generalized tachyon field. Eur. Phys. J. C 72, 2095 (2012). https://doi.org/10.1140/epjc/s10052-012-2095-x

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  • DOI: https://doi.org/10.1140/epjc/s10052-012-2095-x

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