PennylaneToQiskit

Integration of some functions to use Pennylane Dataset with Qiskit.

Pennylane datasets

Pennylane has a library of quantum dataset for various molecules here, that include the hamiltonian ready for Pennylane circuit. For example, you can download the dataset for the H2 molecule:

H2dataset = qml.data.load("qchem", molname="H2", bondlength=0.742, basis="STO-3G")[0]

Hamiltonian

You can access the pannylane hamiltonian:

pennylane_hamiltonian = H2dataset.hamiltonian

And you can convert it to a Qiskit hamiltonian simply

qiskit_hamiltonian = to_qiskit_pauli_hamiltonian(pennylane_hamiltonian)

The Qiskit hamiltonian can be directly used as observable for the Estimator Primitive.

This function can be used only with Pauli Hamiltonian, like the ones in the Quantum Dataset