I'm using python
The following code:
sv = Statevector.from_label('00') mycircuit = QuantumCircuit(2) mycircuit.h(0) sv = sv.evolve(Operator(mycircuit)) print(sv.data)
[0.70710678+0.j 0.70710678+0.j 0. +0.j 0. +0.j]
Which doesn't make sense, because Hadamard on the first qubit (qubit 0) should be equal to $1/\sqrt(2)(|00\rangle+|10\rangle)$ yet the output I get corresponds to $1/\sqrt(2)(|00\rangle+|01\rangle)$.
I'm confused as to why this happens.