update readme

Author: refraction-ray

README.md

@@ -346,6 +346,8 @@ Reference paper: https://arxiv.org/abs/2303.14877.
 
 - GSQAS: Graph Self-supervised Quantum Architecture Search: https://arxiv.org/abs/2303.12381.
 
+- Practical advantage of quantum machine learning in ghost imaging: https://www.nature.com/articles/s42005-023-01290-1 (published in communications physics).
+
   </details>
 
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