## [2017 review - Towards understanding two-level-systems in amorphous solids -- Insights from quantum circuits](https://arxiv.org/abs/1705.01108)
## experiments
2020 [Nanomechanical damping via electron-assisted relaxation of two-level systems](https://arxiv.org/pdf/2009.03804.pdf)
## theory
[Polaronic model of two-level systems in amorphous solids](http://cmt.harvard.edu/demler/PUBLICATIONS/ref188.pdf)
Kartiek Agarwal, Ivar Martin