In this post, I would like to share some thoughts about Hagedorn String. Hagedorn string refers to the hot gas of string close to Hagedorn temperature.

Sidenote: people recently find that a theory can be scale invariant but no conformal invariant https://arxiv.org/pdf/2309.02514.pdf.

In this post, I would like to share some thoughts about Swampland. The idea behind the Swampland program is try to delineat some requirements imposed on the matter sector such that it can be a UV completion theory when coupled to gravity sector. One of my favorate examples about these requirements comes from the work of Kim,Tarazi and Vafa, which imposed the upper bound, i.e. $26-d$ on $d$ dimensional supergavity with 16 supercharges. People would like to ask the priciples behind these requirements, or more precisely, consistency conditions of quantum gravity. In the past years, some ideas on these consistency conditions have been emergent.

You’ll find this post in your _posts directory. Go ahead and edit it and re-build the site to see your changes. You can rebuild the site in many different ways, but the most common way is to run jekyll serve, which launches a web server and auto-regenerates your site when a file is updated.

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