38 lines
2.7 KiB
Plaintext
38 lines
2.7 KiB
Plaintext
---
|
||
title: XXDecomposer
|
||
description: API reference for qiskit.quantum_info.XXDecomposer
|
||
in_page_toc_min_heading_level: 1
|
||
python_api_type: class
|
||
python_api_name: qiskit.quantum_info.XXDecomposer
|
||
---
|
||
|
||
# XXDecomposer
|
||
|
||
<Class id="qiskit.quantum_info.XXDecomposer" isDedicatedPage={true} github="https://github.com/qiskit/qiskit/tree/stable/0.25/qiskit/quantum_info/synthesis/xx_decompose/decomposer.py" signature="qiskit.quantum_info.XXDecomposer(basis_fidelity=1.0, euler_basis='U', embodiments=None, backup_optimizer=None)" modifiers="class">
|
||
Bases: [`object`](https://docs.python.org/3/library/functions.html#object "(in Python v3.12)")
|
||
|
||
A class for optimal decomposition of 2-qubit unitaries into 2-qubit basis gates of XX type (i.e., each locally equivalent to CAN(alpha, 0, 0) for a possibly varying alpha).
|
||
|
||
**Parameters**
|
||
|
||
* **basis\_fidelity** ([*dict*](https://docs.python.org/3/library/stdtypes.html#dict "(in Python v3.12)") *|*[*float*](https://docs.python.org/3/library/functions.html#float "(in Python v3.12)")) – available strengths and fidelity of each. Can be either (1) a dictionary mapping XX angle values to fidelity at that angle; or (2) a single float f, interpreted as \{pi: f, pi/2: f/2, pi/3: f/3}.
|
||
* **euler\_basis** ([*str*](https://docs.python.org/3/library/stdtypes.html#str "(in Python v3.12)")) – Basis string provided to OneQubitEulerDecomposer for 1Q synthesis. Defaults to “U”.
|
||
* **embodiments** ([*dict*](https://docs.python.org/3/library/stdtypes.html#dict "(in Python v3.12)")*\[*[*float*](https://docs.python.org/3/library/functions.html#float "(in Python v3.12)")*,* [*QuantumCircuit*](qiskit.circuit.QuantumCircuit "qiskit.circuit.QuantumCircuit")*] | None*) – A dictionary mapping interaction strengths alpha to native circuits which embody the gate CAN(alpha, 0, 0). Strengths are taken so that pi/2 represents the class of a full CX.
|
||
* **backup\_optimizer** (*Callable\[...,* [*QuantumCircuit*](qiskit.circuit.QuantumCircuit "qiskit.circuit.QuantumCircuit")*] | None*) – If supplied, defers synthesis to this callable when XXDecomposer has no efficient decomposition of its own. Useful for special cases involving 2 or 3 applications of XX(pi/2), in which case standard synthesis methods provide lower 1Q gate count.
|
||
|
||
<Admonition title="Note" type="note">
|
||
If `embodiments` is not passed, or if an entry is missing, it will be populated as needed using the method `_default_embodiment`.
|
||
</Admonition>
|
||
|
||
## Methods
|
||
|
||
### num\_basis\_gates
|
||
|
||
<Function id="qiskit.quantum_info.XXDecomposer.num_basis_gates" signature="num_basis_gates(unitary)">
|
||
Counts the number of gates that would be emitted during re-synthesis.
|
||
|
||
NOTE: Used by ConsolidateBlocks.
|
||
</Function>
|
||
</Class>
|
||
|