43 lines
1.8 KiB
Plaintext
43 lines
1.8 KiB
Plaintext
---
|
||
title: TwoQubitReduction
|
||
description: API reference for qiskit.opflow.converters.TwoQubitReduction
|
||
in_page_toc_min_heading_level: 1
|
||
python_api_type: class
|
||
python_api_name: qiskit.opflow.converters.TwoQubitReduction
|
||
---
|
||
|
||
# TwoQubitReduction
|
||
|
||
<Class id="qiskit.opflow.converters.TwoQubitReduction" isDedicatedPage={true} github="https://github.com/qiskit/qiskit/tree/stable/0.21/qiskit/opflow/converters/two_qubit_reduction.py" signature="TwoQubitReduction(num_particles)" modifiers="class">
|
||
Bases: [`qiskit.opflow.converters.converter_base.ConverterBase`](qiskit.opflow.converters.ConverterBase "qiskit.opflow.converters.converter_base.ConverterBase")
|
||
|
||
Two qubit reduction converter which eliminates the central and last qubit in a list of Pauli that has diagonal operators (Z,I) at those positions.
|
||
|
||
Chemistry specific method: It can be used to taper two qubits in parity and binary-tree mapped fermionic Hamiltonians when the spin orbitals are ordered in two spin sectors, (block spin order) according to the number of particles in the system.
|
||
|
||
**Parameters**
|
||
|
||
**num\_particles** (`Union`\[`int`, `List`\[`int`], `Tuple`\[`int`, `int`]]) – number of particles, if it is a list, the first number is alpha and the second number if beta.
|
||
|
||
## Methods Defined Here
|
||
|
||
### convert
|
||
|
||
<Function id="qiskit.opflow.converters.TwoQubitReduction.convert" signature="TwoQubitReduction.convert(operator)">
|
||
Converts the Operator to tapered one by Z2 symmetries.
|
||
|
||
**Parameters**
|
||
|
||
**operator** ([`OperatorBase`](qiskit.opflow.OperatorBase "qiskit.opflow.operator_base.OperatorBase")) – the operator
|
||
|
||
**Return type**
|
||
|
||
[`OperatorBase`](qiskit.opflow.OperatorBase "qiskit.opflow.operator_base.OperatorBase")
|
||
|
||
**Returns**
|
||
|
||
A new operator whose qubit number is reduced by 2.
|
||
</Function>
|
||
</Class>
|
||
|