Created the README file

README.md

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-# Coherence_from_Interferometry
-A tutorial on using Python to extract the fringe contrast from an interferogram and calculate the temporal decay of the first-order correlation function.
+# Calculating the Temporal Decay of *g*<sup>(1)</sup>(*t*) Using Python
+
+## Objective
+
+This repository aims to demonstrate how to extract the fringe contrast from an interferogram and calculate the temporal decay of the first-order correlation function *g*<sup>(1)</sup>(*t*).
+
+The code was developed by [Konstantinos Orfanakis](https://scholar.google.com/citations?user=U5drfBUAAAAJ&hl=en) and [Dr Hamid Ohadi](https://scholar.google.com/citations?user=x6E7md4AAAAJ&hl=en) at the University of St Andrews and was extensively used for our first publication ([Phys. Rev. B 103, 235313 (2021)](https://journals.aps.org/prb/abstract/10.1103/PhysRevB.103.235313)).