qDrift

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The qdrift function implements the qDrift Trotter evolution of Ref. [1] .

Function: qdrift

Arguments:

• pauli_operator: CArray[PauliTerm],

• evolution_coefficient: CReal,

• num_qdrift: CInt,

• qbv: QArray[QBit],

Example

from classiq import *


@qfunc
def main(qba: Output[QArray[QBit]]):
    allocate(2, qba)
    qdrift(
        [
            PauliTerm(pauli=[Pauli.X, Pauli.Y], coefficient=1.0),
            PauliTerm(pauli=[Pauli.Z, Pauli.I], coefficient=0.5),
        ],
        evolution_coefficient=2.0,
        num_qdrift=5,
        qbv=qba,
    )


qmod = create_model(main, out_file="qdrift")
qprog = synthesize(qmod)

References

[1] E. Campbell, Random Compiler for Fast Hamiltonian Simulation, (2019). https://arxiv.org/abs/1811.08017