ket.draw()必须给予|00>作为结果，但我得到：

Statevector([1.+0.j, 0.+0.j, 0.+0.j, 0.+0.j],
               dims=(2, 2))

我可以改变什么来得到想要的结果？
这是我的代码：

from qiskit import QuantumCircuit
from qiskit.quantum_info import Statevector

qc = QuantumCircuit(2)

# This calculates what the state vector of our qubits would be
# after passing through the circuit 'qc'
ket = Statevector(qc)

# The code below writes down the state vector.
# Since it's the last line in the cell, the cell will display it as output
ket.draw()