Update README.md

Signed-off-by: Fabiana 🚀  Campanari <113218619+FabianaCampanari@users.noreply.github.com>

Author: FabianaCampanari

README.md

@@ -247,6 +247,10 @@ Ramanujan's deep insights into infinite series and modular forms continue to inf
 
    <br>
 
+   [Where]():  
+     - **\( E \)**: Energy of a state.  
+   
+