Adding README

Task2/README.md

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+# Task 2
+Implement a circuit that returns |01> and |10> with equal probability (50% for each).
+
+## Requirements :
+- The circuit should consist only of CNOTs, RXs and RYs. 
+- Start from all parameters in parametric gates being equal to 0 or randomly chosen. 
+- You should find the right set of parameters using gradient descent (you can use more advanced optimization methods if you like). 
+- Simulations must be done with sampling (i.e. a limited number of measurements per iteration) and noise. 
+
+
+Compare the results for different numbers of measurements: 1, 10, 100, 1000. 
+
+## Bonus question:
+How to make sure you produce state |01> + |10> and not |01> - |10> ?
+
+(Actually for more careful readers, the “correct” version of this question is posted below:
+How to make sure you produce state  |01⟩  +  |10⟩  and not any other combination of |01> + e(i*phi)|10⟩ (for example |01⟩  -  |10⟩)?)
+