qiskit.opflow.evolutions.QDrift
class QDrift(reps=1)
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 https://arxiv.org/abs/1811.08017.
Parameters
reps (int) – The number of times to repeat the Trotterization circuit.
__init__
__init__(reps=1)
Parameters
reps (int) – The number of times to repeat the Trotterization circuit.
Methods
__init__([reps]) | type repsint |
convert(operator) | Convert a SummedOp into a ComposedOp or CircuitOp representing an approximation of e^-i*``op_sum``. |
Attributes
reps | The number of repetitions to use in the Trotterization, improving the approximation accuracy. |
convert
convert(operator)
Convert a SummedOp into a ComposedOp or CircuitOp representing an approximation of e^-i*``op_sum``.
Parameters
operator (OperatorBase) – The SummedOp to evolve.
Return type
OperatorBase
Returns
The Operator approximating op_sum’s evolution.
Raises
TypeError – A non-SummedOps Operator is passed into convert.
reps
The number of repetitions to use in the Trotterization, improving the approximation accuracy.
Return type
int