A Self-tuning Exact Solution and the Non-existence of Horizons in 5d Gravity-Scalar System

نویسنده

  • Chuan-Jie Zhu
چکیده

We present an exact thick domain wall solution with naked singularities to five dimensional gravity coupled with a scalar field with exponential potential. In our solution we found exactly the special coefficient of the exponent as coming from compactification of string theory with cosmological constant. We show that this solution is self-tuning when a 3-brane is included. In searching for a solution with horizon we found a similar exact solution with fine-tuned exponent coefficient with an integration constant. Failing to find a solution with horizon we prove the non-existence of horizons. These naked singularities actually can’t be resolved by horizon. We also comment on the physical relevance of this solution. e-mail: [email protected] Permanent address

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تاریخ انتشار 2000