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Ju n 20 07 A Wrinkle in Coleman-De Luccia
| Content Provider | Semantic Scholar |
|---|---|
| Author | Brown, Adam R. Sarangi, Saswat Shlaer, Benjamin Weltman, Amanda |
| Copyright Year | 2013 |
| Abstract | The decay of a false vacuum in a quantum field theory with the conventional 1 2 (∂μφ) 2 kinetic term was first studied by Coleman[1] via the semiclassical approximation. The effects of gravitation were later included[2]. This work found application in the string landscape, where vacuum decay offers the mechanism by which the multitude of string vacua can be sampled [3]. However, the action appropriate in an open string context has a richer structure than that considered in [1, 2]. We will show that this structure can radically modify the lifetime of certain vacua. To exemplify these modifications, in this letter we consider the case where open string moduli explore the string landscape. Branes and the charges they carry are a crucial part of stable compactifications, and the dynamics of such objects under any process of vacuum selection warrants careful study. In the context of D3 branes probing a type IIB compactification[4] with warp factor 1/f(φ) and potential V (φ)[5], the relevant action is of the Dirac-Born-Infeld (DBI) type. Using this action we will discover two novel features: that the dominant instanton may have a “wrinkle” (see Fig. 2), and that raising the potential barrier can increase the tunneling rate. The net result is that as the barrier height reaches the string scale, the decay rate becomes orders of magnitude faster than the CDL prediction. This effect can be traced to the fact that nucleated bubbles of true vacuum can have parametrically lower domain wall tensions than those arising from the CDL theory. We assume the reader is familiar with the original work by Coleman and De Luccia, which we follow closely. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://researchspace.auckland.ac.nz/bitstream/handle/2292/38941/0706.0485v2.pdf?sequence=2 |
| Alternate Webpage(s) | http://export.arxiv.org/pdf/0706.0485 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
