## https://arxiv.org/search/cond-mat?searchtype=author&query=Shukla%2C+P

- 2021 [Universality of Ultrasonic attenuation in amorphous systems at low temperatures - Pragya Shukla](https://arxiv.org/pdf/2009.00556.pdf)

> Based on experimental evidence of ordered structure in glasses **below MRO (10 → 30˚A)** and its lack above, we describe a macroscopic size glass material as **elastically coupled, spherical shape**, generic blocks, with **homogeneous dispersion interaction within each such block**.

## [Low temperature Universalities in amorphous systems: role of microscopic length scales](https://arxiv.org/pdf/2101.00492.pdf)

> **For amorphous systems, the length scale is of the medium range topological orders and its ratio with the distance of closest approach between molecules turns out to be a constant.**

> The above length scales are also related to Ioffe-Regel frequency and boson peak frequency of the vibrational spectrum
> and indicate that the former is of the same order as the latter for transverse phonon-dynamics

> ... The approach in [21] however is based on phonon mediated interactions of generic blocks only, does not take into account the role of **interactions within a block and as a consequence, does not explain the physical origin of MB universality**. This motivates us to pursue the present work which indicates **the origin to lie in a competition between dispersion interactions and phonon mediated coupling between molecules**


## 2021 [Boson peak in amorphous systems: role of phonon mediated coupling of nano-clusters](https://arxiv.org/pdf/2102.11216.pdf)

> We also find that **the copuling between the blocks has no significant effect on the VDOS in the edge of the spectrum** and it retains the same approximate Airy functional form as that of a single basic block. Beyond a certain energy scale (of the order of Ioffe-Regel frequency), however phonon DOS becomes significant, resulting in a small flat region for a small energy range and thereafter dominating
> the DOS.

## other papers

[subluminal neutrino](https://arxiv.org/ftp/arxiv/papers/1110/1110.2832.pdf) + MV Berry

2010  [Chalker+ Shukla  - Anderson localisation](https://arxiv.org/pdf/1008.3256.pdf)

## still amorphous solids

- 2021 [Low temperature heat capacity of amorphous systems: physics at nano-scales](https://arxiv.org/pdf/2008.12960.pdf)

> The omnipresence of dispersion forces at microscopic scales indicates the application of our results to other disordered materials too.

[Potential insights into non-equilibrium behavior from atomic physics](https://arxiv.org/pdf/1106.3567.pdf) Austen Lamacraft
[Nonuniversality and strongly interacting two-level systems in glasses at low temperatures](https://iopscience.iop.org/article/10.1088/1367-2630/aac930/pdf)