37 lines
2.1 KiB
Plaintext
37 lines
2.1 KiB
Plaintext
---
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title: oracles
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description: API reference for qiskit.aqua.components.oracles
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in_page_toc_min_heading_level: 2
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python_api_type: module
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python_api_name: qiskit.aqua.components.oracles
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---
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<span id="module-qiskit.aqua.components.oracles" />
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<span id="qiskit-aqua-components-oracles" />
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# Oracles
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<span id="module-qiskit.aqua.components.oracles" />
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`qiskit.aqua.components.oracles`
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An oracle is a black box operation used as input to another algorithm. They tend to encode a function $f:\{0,1\}^n \rightarrow \{0,1\}^m$ where the goal of the algorithm is to determine some property of $f$.
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Oracles are used by [`Grover`](qiskit.aqua.algorithms.Grover "qiskit.aqua.algorithms.Grover") and [`DeutschJozsa`](qiskit.aqua.algorithms.DeutschJozsa "qiskit.aqua.algorithms.DeutschJozsa") algorithms for example.
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# Oracle Base Class
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| ----------------------------------------------------------------------------------------- | ----------------------- |
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| [`Oracle`](qiskit.aqua.components.oracles.Oracle "qiskit.aqua.components.oracles.Oracle") | Base class for oracles. |
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# Oracles
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| -------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------- |
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| [`LogicalExpressionOracle`](qiskit.aqua.components.oracles.LogicalExpressionOracle "qiskit.aqua.components.oracles.LogicalExpressionOracle") | The Logical Expression Quantum Oracle. |
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| [`TruthTableOracle`](qiskit.aqua.components.oracles.TruthTableOracle "qiskit.aqua.components.oracles.TruthTableOracle") | The Truth Table-based Quantum Oracle. |
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| [`CustomCircuitOracle`](qiskit.aqua.components.oracles.CustomCircuitOracle "qiskit.aqua.components.oracles.CustomCircuitOracle") | The Custom Circuit-based Quantum Oracle. |
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