Update 'README.md'

README.md

@@ -37,6 +37,7 @@ ___
 - https://bartoszmilewski.com/2015/03/13/function-types/
 - [Banach Tarski Paradox](https://en.wikipedia.org/wiki/Banach%E2%80%93Tarski_paradox)
 - [Courcelle's Theorem](https://en.wikipedia.org/wiki/Courcelle%27s_theorem)
+- [Quantum Cheshire Cat](https://en.wikipedia.org/wiki/Quantum_Cheshire_cat)
 
 
 ## [Mathematics and Theoretical Computer Science](mathematics.md)