Bad Qubits — Learn Quantum by Doing

Multiple choice

For a hardware-efficient ansatz (HEA) with n qubits and L repeated layers of native single- and two-qubit gates, how does the number of variational parameters scale?

O(2^n): exponential in the number of qubits, like an arbitrary unitary
O(n*L): linear in both the number of qubits and the number of layers
O(1): a constant number of parameters regardless of n and L
O(L^2): quadratic in the number of layers, independent of n