Active Qubit Reset
This example demonstrates active qubit reset, in which a qubit is first readout and then a pi-pulse is applied conditionally on whether the qubit was found in the |1> state. The BlockConditional instruction provides the conditional branching.
Example schedule
Tree format:
graph TD
NumericExpression1["200"]
Port1["Port"]
Port1 -- "Id" --- NumericExpression1
Frequency1["7 GHz"]
Radians2["0 rad"]
Frequency3["20 MHz"]
Frame1["Frame"]
Frame1 -- "Port" --- Port1
Frame1 -- "Frequency" --- Frequency1
Frame1 -- "Phase" --- Radians2
Frame1 -- "IntermediateFrequency" --- Frequency3
Interval4["1 μs"]
Waveform1["ConstantWaveform"]
Waveform1 -- "Duration" --- Interval4
Instruction3["ModulatedPulse"]
Instruction3 -- "Frame" --- Frame1
Instruction3 -- "Envelope" --- Waveform1
NumericExpression2["0.2"]
Amplitude5["Amplitude"]
Amplitude5 -- "Value" --- NumericExpression2
Instruction3 -- "Amplitude" --- Amplitude5
NumericExpression3["300"]
Port2["Port"]
Port2 -- "Id" --- NumericExpression3
Interval6["1 μs"]
ComplexRangeExpression1["AcquisitionComplexRangeResult"]
Instruction4["AdcAcquisition"]
Instruction4 -- "Port" --- Port2
Instruction4 -- "Duration" --- Interval6
Instruction4 -- "Result" --- ComplexRangeExpression1
Instruction5:Alignment["StartToStart"]
Instruction5:Relationship["InstructionRelationship"]
Instruction5:Relationship -- "Alignment" --- Instruction5:Alignment
Instruction5["Dependency"]
Instruction5 -- "Relationship" --- Instruction5:Relationship
Instruction5 -- "Lhs" --- Instruction3
Instruction5 -- "Rhs" --- Instruction4
ComplexRangeExpression2["Demodulation"]
ComplexRangeExpression2 -- "Frame" --- Frame1
ComplexRangeExpression2 -- "Trace" --- ComplexRangeExpression1
ComplexRangeExpression3:Values["(0, 0), (1, 2), (3, 4)"]
ComplexRangeExpression3["LiteralComplexRange"]
ComplexRangeExpression3 -- "Values" --- ComplexRangeExpression3:Values
ComplexExpression1["ComplexDotProduct"]
ComplexExpression1 -- "Lhs" --- ComplexRangeExpression2
ComplexExpression1 -- "Rhs" --- ComplexRangeExpression3
NumericExpression4["ComplexRealValue"]
NumericExpression4 -- "Operand" --- ComplexExpression1
NumericExpression5["5"]
BooleanExpression1["GreaterThan"]
BooleanExpression1 -- "Lhs" --- NumericExpression4
BooleanExpression1 -- "Rhs" --- NumericExpression5
NumericExpression6["100"]
Port3["Port"]
Port3 -- "Id" --- NumericExpression6
Frequency7["5 GHz"]
Radians8["0 rad"]
Frequency9["10 MHz"]
Frame2["Frame"]
Frame2 -- "Port" --- Port3
Frame2 -- "Frequency" --- Frequency7
Frame2 -- "Phase" --- Radians8
Frame2 -- "IntermediateFrequency" --- Frequency9
Interval10["100 ns"]
Waveform2["ConstantWaveform"]
Waveform2 -- "Duration" --- Interval10
Instruction6["ModulatedPulse"]
Instruction6 -- "Frame" --- Frame2
Instruction6 -- "Envelope" --- Waveform2
NumericExpression7["0.5"]
Amplitude11["Amplitude"]
Amplitude11 -- "Value" --- NumericExpression7
Instruction6 -- "Amplitude" --- Amplitude11
Interval12["100 ns"]
Instruction7["Delay"]
Instruction7 -- "Duration" --- Interval12
Instruction8["BlockConditional"]
Instruction8 -- "Guard" --- BooleanExpression1
Instruction8 -- "TrueCase1" --- Instruction6
Instruction8 -- "FalseCase1" --- Instruction7
Instruction9:Alignment["EndToStart"]
Instruction9:Relationship["InstructionRelationship"]
Instruction9:Relationship -- "Alignment" --- Instruction9:Alignment
Instruction9["Dependency"]
Instruction9 -- "Relationship" --- Instruction9:Relationship
Instruction9 -- "Lhs" --- Instruction5
Instruction9 -- "Rhs" --- Instruction8
Job["Job"]
Job -- "EntryPoint1" --- Instruction9JSON format:
Job definition
{
"version": "0.1.0",
"compatible_version": "0.1.0",
"acquisition_complex_range_results": {
"AcquisitionComplexRangeResult1": {}
},
"frames": {
"Frame1": {
"port": {
"id": {
"$type": "NumericLiteral",
"value": 200
}
},
"frequency": {
"$type": "NumericLiteral",
"value": 7000000000
},
"phase": {
"$type": "NumericLiteral",
"value": 0
},
"intermediate_frequency": {
"$type": "NumericLiteral",
"value": 20000000
}
}
},
"entry_point": [
{
"$type": "Dependency",
"relationship": {},
"lhs": {
"$type": "Dependency",
"relationship": {
"alignment": "StartToStart"
},
"lhs": {
"$type": "ModulatedPulse",
"frame": {
"$ref": "Frame1"
},
"envelope": {
"$type": "ConstantWaveform",
"duration": {
"$type": "NumericLiteral",
"value": 1E-06
}
},
"phase_offset": {
"$type": "NumericLiteral",
"value": 0
},
"amplitude": {
"$type": "NumericLiteral",
"value": 0.2
}
},
"rhs": {
"$type": "AdcAcquisition",
"port": {
"id": {
"$type": "NumericLiteral",
"value": 300
}
},
"duration": {
"$type": "NumericLiteral",
"value": 1E-06
},
"result": {
"$ref": "AcquisitionComplexRangeResult1"
}
}
},
"rhs": {
"$type": "BlockConditional",
"guard": {
"$type": "ComparisonOperation",
"operator": "GreaterThan",
"lhs": {
"$type": "ComplexRealValue",
"operand": {
"$type": "ComplexDotProduct",
"lhs": {
"$type": "Demodulation",
"frame": {
"$ref": "Frame1"
},
"trace": {
"$ref": "AcquisitionComplexRangeResult1"
}
},
"rhs": {
"$type": "LiteralComplexRange",
"values": [
[
0,
0
],
[
1,
2
],
[
3,
4
]
]
}
}
},
"rhs": {
"$type": "NumericLiteral",
"value": 5
}
},
"true_case": [
{
"$type": "ModulatedPulse",
"frame": {
"port": {
"id": {
"$type": "NumericLiteral",
"value": 100
}
},
"frequency": {
"$type": "NumericLiteral",
"value": 5000000000
},
"phase": {
"$type": "NumericLiteral",
"value": 0
},
"intermediate_frequency": {
"$type": "NumericLiteral",
"value": 10000000
}
},
"envelope": {
"$type": "ConstantWaveform",
"duration": {
"$type": "NumericLiteral",
"value": 1E-07
}
},
"phase_offset": {
"$type": "NumericLiteral",
"value": 0
},
"amplitude": {
"$type": "NumericLiteral",
"value": 0.5
}
}
],
"false_case": [
{
"$type": "Delay",
"duration": {
"$type": "NumericLiteral",
"value": 1E-07
}
}
]
}
}
]
}