95 lines
2.8 KiB
Plaintext
95 lines
2.8 KiB
Plaintext
---
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title: RCCXGate
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description: API reference for qiskit.circuit.library.RCCXGate
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in_page_toc_min_heading_level: 1
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python_api_type: class
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python_api_name: qiskit.circuit.library.RCCXGate
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---
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# RCCXGate
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<Class id="qiskit.circuit.library.RCCXGate" isDedicatedPage={true} github="https://github.com/qiskit/qiskit/tree/stable/0.21/qiskit/circuit/library/standard_gates/x.py" signature="RCCXGate(label=None)" modifiers="class">
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Bases: [`qiskit.circuit.gate.Gate`](qiskit.circuit.Gate "qiskit.circuit.gate.Gate")
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The simplified Toffoli gate, also referred to as Margolus gate.
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The simplified Toffoli gate implements the Toffoli gate up to relative phases. This implementation requires three CX gates which is the minimal amount possible, as shown in [https://arxiv.org/abs/quant-ph/0312225](https://arxiv.org/abs/quant-ph/0312225). Note, that the simplified Toffoli is not equivalent to the Toffoli. But can be used in places where the Toffoli gate is uncomputed again.
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This concrete implementation is from [https://arxiv.org/abs/1508.03273](https://arxiv.org/abs/1508.03273), the dashed box of Fig. 3.
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Can be applied to a [`QuantumCircuit`](qiskit.circuit.QuantumCircuit "qiskit.circuit.QuantumCircuit") with the [`rccx()`](qiskit.circuit.QuantumCircuit#rccx "qiskit.circuit.QuantumCircuit.rccx") method.
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Create a new simplified CCX gate.
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## Attributes
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### condition\_bits
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<Attribute id="qiskit.circuit.library.RCCXGate.condition_bits">
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Get Clbits in condition.
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**Return type**
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`List`\[[`Clbit`](qiskit.circuit.Clbit "qiskit.circuit.classicalregister.Clbit")]
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</Attribute>
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### decompositions
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<Attribute id="qiskit.circuit.library.RCCXGate.decompositions">
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Get the decompositions of the instruction from the SessionEquivalenceLibrary.
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</Attribute>
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### definition
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<Attribute id="qiskit.circuit.library.RCCXGate.definition">
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Return definition in terms of other basic gates.
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</Attribute>
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### duration
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<Attribute id="qiskit.circuit.library.RCCXGate.duration">
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Get the duration.
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</Attribute>
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### label
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<Attribute id="qiskit.circuit.library.RCCXGate.label">
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Return instruction label
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**Return type**
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`str`
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</Attribute>
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### name
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<Attribute id="qiskit.circuit.library.RCCXGate.name">
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Return the name.
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</Attribute>
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### num\_clbits
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<Attribute id="qiskit.circuit.library.RCCXGate.num_clbits">
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Return the number of clbits.
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</Attribute>
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### num\_qubits
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<Attribute id="qiskit.circuit.library.RCCXGate.num_qubits">
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Return the number of qubits.
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</Attribute>
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### params
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<Attribute id="qiskit.circuit.library.RCCXGate.params">
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return instruction params.
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</Attribute>
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### unit
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<Attribute id="qiskit.circuit.library.RCCXGate.unit">
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Get the time unit of duration.
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</Attribute>
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</Class>
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