Abstract
A wormhole is defined as a topological structure with a throat connecting two asymptotically-flat spaces. In order to have and maintain the structure of the wormhole, a geometrical flare-out condition, i.e., a minimal size at throat, needs to be satisfied. In the case of a Morris-Thorne-type wormhole, the condition is given by surface tension which is huge compared to the energy density times the square of the light speed. In this paper, we re-considered the flare-out condition for a wormhole by using the Einstein equation, checked the finiteness of the pressure, and investigated its physical meaning. We also derived the power-law form of the flare-out condition.
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Kim, SW. Flare-out condition of a Morris-Thorne wormhole and finiteness of pressure. Journal of the Korean Physical Society 63, 1887–1891 (2013). https://doi.org/10.3938/jkps.63.1887
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DOI: https://doi.org/10.3938/jkps.63.1887