I was just curious; when do the qubits get entangled? Do the qubits get entangled right after initialization or do they get entangled when we apply Hadamard Gates to the qubits?
As mentioned before, qubits are only entangled by means of 2-qubit gates and not by 1-qubit gates, which only cause a rotation of the qubit state in question. Therefore, 2-qubit gates are needed to provide anything meaningful on a quantum computer other than pure random number generation. Practically, 2-qubit gates (typically a CX - gate) are harder to realize than 1-qubit gates, which also leads to a significantly larger quantum error.