57 lines
2.3 KiB
Plaintext
57 lines
2.3 KiB
Plaintext
---
|
||
title: QDrift
|
||
description: API reference for qiskit.opflow.evolutions.QDrift
|
||
in_page_toc_min_heading_level: 1
|
||
python_api_type: class
|
||
python_api_name: qiskit.opflow.evolutions.QDrift
|
||
---
|
||
|
||
# QDrift
|
||
|
||
<Class id="qiskit.opflow.evolutions.QDrift" isDedicatedPage={true} github="https://github.com/qiskit/qiskit/tree/stable/0.25/qiskit/opflow/evolutions/trotterizations/qdrift.py" signature="qiskit.opflow.evolutions.QDrift(reps=1)" modifiers="class">
|
||
Bases: [`TrotterizationBase`](qiskit.opflow.evolutions.TrotterizationBase "qiskit.opflow.evolutions.trotterizations.trotterization_base.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](https://arxiv.org/abs/1811.08017).
|
||
|
||
<Admonition title="Deprecated since version 0.24.0" type="danger">
|
||
The class `qiskit.opflow.evolutions.trotterizations.qdrift.QDrift` is deprecated as of qiskit-terra 0.24.0. It will be removed no earlier than 3 months after the release date. For code migration guidelines, visit [https://qisk.it/opflow\_migration](https://qisk.it/opflow_migration).
|
||
</Admonition>
|
||
|
||
**Parameters**
|
||
|
||
**reps** ([*int*](https://docs.python.org/3/library/functions.html#int "(in Python v3.12)")) – The number of times to repeat the Trotterization circuit.
|
||
|
||
## Attributes
|
||
|
||
### reps
|
||
|
||
<Attribute id="qiskit.opflow.evolutions.QDrift.reps">
|
||
The number of repetitions to use in the Trotterization, improving the approximation accuracy.
|
||
</Attribute>
|
||
|
||
## Methods
|
||
|
||
### convert
|
||
|
||
<Function id="qiskit.opflow.evolutions.QDrift.convert" signature="convert(operator)">
|
||
Convert a `SummedOp` into a `ComposedOp` or `CircuitOp` representing an approximation of e^-i\*\`\`op\_sum\`\`.
|
||
|
||
**Parameters**
|
||
|
||
**operator** ([*OperatorBase*](qiskit.opflow.OperatorBase "qiskit.opflow.operator_base.OperatorBase")) – The `SummedOp` to evolve.
|
||
|
||
**Returns**
|
||
|
||
The Operator approximating op\_sum’s evolution.
|
||
|
||
**Raises**
|
||
|
||
[**TypeError**](https://docs.python.org/3/library/exceptions.html#TypeError "(in Python v3.12)") – A non-SummedOps Operator is passed into `convert`.
|
||
|
||
**Return type**
|
||
|
||
[*OperatorBase*](qiskit.opflow.OperatorBase "qiskit.opflow.operator_base.OperatorBase")
|
||
</Function>
|
||
</Class>
|
||
|