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arXiv 1104.4019hep-thgr-qc
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D=11超引力宇宙学解的形变

Deformations of Cosmological Solutions of D=11 Supergravity

Nihat Sadik Deger, Ali Kaya

摘要:

研究了D=11超引力宇宙学背景的Lunin-Maldacena形变,给出了一种从具有至少3个U(1)等距的纯Einstein方程的解出发,生成具有非零4-形式通量的解的简便方法.我们说明了这一点上的真空S-膜的解决方案,从通常的SM 2-膜的解决方案。再次应用该方法,可以得到最近发现的S-膜系统,其中Chern-Simons项对场方程的贡献是非零的,或者得到SM 2-SM 2(0)相交,这取决于在该过程中使用哪个U(1)方向。重复使用的过程中产生的配置与几个重叠的S膜,其中一些是新的。我们还采用这种方法来构建两个新的解决方案,并作出评论,加速宇宙学遵循这种变形的解决方案后,紧化到(1+3)维。

英文摘要:

We study Lunin-Maldacena deformations of cosmological backgrounds of D=11 supergravity which gives an easy way to generate solutions with nonzero 4-form flux starting from solutions of pure Einstein equations which possess at least three U(1) isometries. We illustrate this on the vacuum S-brane solution from which the usual SM2-brane solution is obtained. Applying the method again, one either gets the recently found S-brane system where contribution of the Chern-Simons term to field equations is non-zero or the SM2-SM2(0) intersection, depending on which U(1) directions are used during the process. Repeated usage of the procedure gives rise to configurations with several overlapping S-branes some of which are new. We also employ this method to construct two more new solutions and make comments about accelerating cosmologies that follow from such deformed solutions after compactification to (1+3)-dimensions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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