On closed string tachyon dynamics
On closed string tachyon dynamics
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闭弦快子动力学
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
A. Lawrence
中科院分区：
文献类型：
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作者：
D. Freedman;M. Headrick;A. Lawrence
我们研究了闭弦快子的凝聚作为一个含时过程。特别是，我们研究快子的波函数是空间填充或本地化在一个紧凑的空间，其质量是小弦单位;我们的分析是一般的，不依赖于任何特定的模型。使用世界片方法，我们计算耦合快子-介子系统的运动方程，并表明快子遵循测地运动相对于Zamolodchikov度规，受到正比于其β函数和摩擦力的时间导数的快子成比例。我们研究世界片RG流和我们的方程的解决方案之间的关系，找到一个密切的关系的情况下，空间理论是超临界的，并有一个负的时间导数。
We study the condensation of closed-string tachyons as a time-dependent process. In particular, we study tachyons whose wave functions are either space-filling or localized in a compact space, and whose masses are small in string units; our analysis is otherwise general and does not depend on any specific model. Using world-sheet methods, we calculate the equations of motion for the coupled tachyon-dilaton system, and show that the tachyon follows geodesic motion with respect to the Zamolodchikov metric, subject to a force proportional to its beta function and friction proportional to the time derivative of the dilaton. We study the relationship between world-sheet RG flow and the solutions to our equations, finding a close relationship in the case that the spatial theory is supercritical and the dilaton has a negative time derivative.