String theory and the classical stability of plane waves
String theory and the classical stability of plane waves
复制标题
弦理论和平面波的经典稳定性
DOI：
10.1103/physrevd.67.045014
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发表时间：
2002
影响因子：
5
通讯作者：
P. Saffin
中科院分区：
文献类型：
--
作者：
D. Brecher;J. P. Gregory;P. Saffin
在标准场论中，负质量平方场的存在通常会导致某种形式的不稳定性。至少在光锥规范中，在平面波时空中传播的弦可以具有这样的快子质量的世界面标量，这一观察表明超引力背景本身可能是不稳定的。为了解决这个问题，我们进行了IIB型真空平面波周围的微扰分析，该解决方案最明显地产生负质量平方的世界面标量。我们认为，这个背景是微扰稳定。
The presence of fields with negative mass-squared typically leads to some form of instability in standard field theories. The observation that, at least in the light-cone gauge, strings propagating in plane wave spacetimes can have worldsheet scalars with such tachyon-like masses suggests that the supergravity background may itself be unstable. To address this issue, we perform a perturbative analysis around the type IIB vacuum plane wave, the solution which most obviously generates worldsheet scalars with negative mass-squared. We argue that this background is perturbatively stable.