- class QDrift(reps=1, insert_barriers=False, cx_structure='chain', atomic_evolution=None)¶
The QDrift Trotterization method, which selects each each term in the Trotterization randomly, with a probability proportional to its weight. Based on the work of Earl Campbell in Ref. .
: E. Campbell, „A random compiler for fast Hamiltonian simulation“ (2018). arXiv:quant-ph/1811.08017
reps (int) – The number of times to repeat the Trotterization circuit.
insert_barriers (bool) – Whether to insert barriers between the atomic evolutions.
cx_structure (str) – How to arrange the CX gates for the Pauli evolutions, can be „chain“, where next neighbor connections are used, or „fountain“, where all qubits are connected to one.
atomic_evolution (Optional[Callable[[Union[Pauli, SparsePauliOp], float], QuantumCircuit]]) – A function to construct the circuit for the evolution of single Pauli string. Per default, a single Pauli evolution is decomopsed in a CX chain and a single qubit Z rotation.
Return the settings in a dictionary, which can be used to reconstruct the object.
A dictionary containing the settings of this product formula.
NotImplementedError – If a custom atomic evolution is set, which cannot be serialized.