标题： 半经典超引力真空的稳定性 显示英文标题

标题： Semi-classical stability of supergravity vacua

摘要： 如果瞬子衰变模式存在，将表明十维和十一维超引力理论的真空具有半经典不稳定性。 之前已经构造了自旋结构与超对称真空不兼容的衰变模式，我们给出了包括涉及非平凡的稀疏子和反对称张量场的推广。 然后我们表明，任何描述超对称真空衰变的瞬子必须满足两个条件：从一个零动量超曲面出发，我们可以描述随后的洛伦兹演化，并且在无穷远处具有与假设真空相容的自旋结构。这一要求排除了所有这些衰变模式，除了那些具有物理上不合理的能量动量张量的模式，这些张量违反了主导能量条件。 显示英文摘要

摘要： The existence of instantonic decay modes would indicate a semi-classical instability of the vacua of ten and eleven dimensional supergravity theories. Decay modes whose spin structures are incompatible with those of supersymmetric vacua have previously been constructed, and we present generalisations including those involving non trivial dilaton and antisymmetric tensor fields. We then show that the requirement that any instanton describing supersymmetric vacuum decay should admit both a zero momentum hypersurface from which we describe the subsequent Lorentzian evolution and a spin structure at infinity compatible with the putative vacuum excludes all such decay modes, except those with unphysical energy momentum tensors which violate the dominant energy condition.