Update README.md

README.md

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-##Brief files description:
+# Brief description of the files:
 
-#1. stat_langevin.py
+1. stat_langevin.py
  	- Gaussian stochastic dynamics for a Brownian particle. Mean value and variance are calculated. Algorithm based on Ref.[1].
 
-#2. FT_langevin.py
+2. FT_langevin.py
 	- Gaussian stochastic dynamics for a Brownian particle under a harmonic potential whose center of mass is displaced with constant velocity (see Ref.[2]). 
 	Fluctuation Theorem for work is calculated. Algorithm based on Ref.[1].
 
-##References:
+## References:
 [1] https://aip.scitation.org/doi/abs/10.1063/1.4802990
 [2] https://journals.aps.org/pre/abstract/10.1103/PhysRevE.67.046102
+
+
+# Quantum refrigerator
+
+This is the repository for projects in collaboration with the NV centre group at the Institute of Physics III, University of Stuttgart, on theory and experimental implementations of quantum refrigerators.
+
+## Repository content
+
+1. Notes elaborating my personal understanding of the topics relevant in the research.
+2. Overleaf git modules containing collaborative content, mainly of manuscript drafts.
+3. Files for data analysis, plotting data, numerical and symbolic computation (such as raw `.csv` files, Mathematica notebooks `.nb`, packages `.m`, Jupyer notebooks `.ipynb`, etc).
+4. File divisions for subprojects, such as those referring to the minimal HBAC, and those for the QET-HBAC.
+5. Research references.
+6. Files for presentations, posters, etc.
+
+Disclaimer: not every file is being tracked by git and synchronized with remote repositories.
+
+## Folder structure
+
+The repository is divided into two projects, each concerning of the parts introduced in the previous section.
+
+### Analysing the experimental data (Analysis)
+
+1. `preliminary-run/`