Expected output for vqe_h2_zz.qasm:

This file measures one VQE trial state in the Z basis.
In displayed q[0] q[1] order, an ideal 1024-shot run should
put most of the probability on the two occupation patterns:

  {'01': ~512, '10': ~512}

Small deviations are normal shot noise.

These Z-basis counts estimate the Z0, Z1, and Z0Z1 terms of
the reduced H2 Hamiltonian. A complete VQE energy estimate also
requires X-basis and Y-basis measurement circuits for the X0X1
and Y0Y1 terms, followed by a classical combination of all Pauli
expectations with their Hamiltonian coefficients.