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QDrift

qiskit.opflow.evolutions.QDrift(reps=1)

GitHub(opens in a new tab)

Bases: TrotterizationBase

Deprecated: 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(opens in a new tab).

Deprecated since version 0.24.0

The class qiskit.opflow.evolutions.trotterizations.qdrift.QDrift is deprecated as of qiskit-terra 0.24.0. It will be removed in the Qiskit 1.0 release. For code migration guidelines, visit https://qisk.it/opflow_migration(opens in a new tab).

Parameters

reps (int(opens in a new tab)) – The number of times to repeat the Trotterization circuit.


Attributes

reps

The number of repetitions to use in the Trotterization, improving the approximation accuracy.


Methods

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.

Returns

The Operator approximating op_sum’s evolution.

Raises

TypeError(opens in a new tab) – A non-SummedOps Operator is passed into convert.

Return type

OperatorBase

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