Two-bubble envelope approximation code and results

This deposit contains the code required to carry out the envelope approximation simulations used in the paper with preprint title Vacuum bubble collisions: from microphysics to gravitational waves by Oliver Gould, Satumaaria Sukuvaara, and David Weir.

The method and results are based on the following papers:

Gravitational Wave Production by Collisions: More Bubbles by Stephan J. Huber and Thomas Konstandin [arXiv:0806.1828].

Gravitational radiation from colliding vacuum bubbles: envelope approximation to many bubble collisions by Arthur Kosowsky and Michael S. Turner [arXiv:astro-ph/9211004].

Gravitational radiation from colliding vacuum bubbles by Arthur Kosowsky, Michael S. Turner and Richard Watkins [Inspire].

In the latter paper the envelope approximation is introduced in Appendix C.

There are two files:

dweir-envelope-b2842c4827ad.zip is a snapshot of the Bitbucket-hosted Git repository for the simulation code, corresponding to the commit tagged v1.1.0. Later versions of the code may exist. The snapshot was generated by the Bitbucket service and does not include the Git metadata.

two-bubbles-envelope-data.tar.gz is an archive of the simulation results used to generate the envelope approximation results seen in the preprint, as well as numerical tests and some additional numerical explorations. While the results were generated with a slightly earlier version of the code than the tagged release in this deposit, they have been confirmed to be reproducible with the code provided.

Both archives contain README.md files with further information.

本数据集包含复现预印本《Vacuum bubble collisions: from microphysics to gravitational waves》（作者为Oliver Gould、Satumaa Sukuvaara与David Weir）中所用包膜近似（envelope approximation）模拟所需的代码。

本研究的方法与结果基于以下学术论文：
1. 《Gravitational Wave Production by Collisions: More Bubbles》，作者Stephan J. Huber与Thomas Konstandin，arXiv:0806.1828。
2. 《Gravitational radiation from colliding vacuum bubbles: envelope approximation to many bubble collisions》，作者Arthur Kosowsky与Michael S. Turner，arXiv:astro-ph/9211004。
3. 《Gravitational radiation from colliding vacuum bubbles》，作者Arthur Kosowsky、Michael S. Turner与Richard Watkins，收录于Inspire数据库。

上述第三篇论文的附录C中首次引入了包膜近似方法。

本数据集包含两个归档文件：
1. dweir-envelope-b2842c4827ad.zip：该文件为托管于Bitbucket平台的模拟代码Git仓库快照，对应标签为v1.1.0的提交版本。该代码后续可能存在更新版本。此快照由Bitbucket服务自动生成，未包含Git元数据。
2. two-bubbles-envelope-data.tar.gz：该归档包含本预印本中用于生成包膜近似结果的模拟数据，同时涵盖数值测试与部分额外数值探索内容。尽管该数据集的生成所用代码版本略早于本归档中提供的带标签发布版本，但经验证，使用本归档提供的代码可复现该数据集的结果。

两个归档文件均附带README.md文档，可供查阅更多详细信息。