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Documentation Index

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Functions:
NameDescription
swap_test[Qmod Classiq-library function].

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swap_test

swap_test(
state1: QArray[QBit],
state2: QArray[QBit],
test: Output[QBit]
) -> None
[Qmod Classiq-library function] Tests the overlap (in terms of fidelity) of two quantum states. The fidelity of state1 and state2 is calculated from the probability of measuring test qubit in the state 0 as follows: ∣⟨state1∣state2⟩∣2=2∗Prob(test=0)−1 |\langle state1 | state2 \rangle |^2 = 2*Prob(test=0)-1 Parameters:
NameTypeDescriptionDefault
state1QArray[QBit]A quantum state to check its overlap with state2.required
state2QArray[QBit]A quantum state to check its overlap with state1.required
testOutput[QBit]A qubit for which the probability of measuring 0 is 0.5∗(∥⟨state1∥state2⟩∥2+1)0.5*(\|\langle state1 \| state2 \rangle \|^2+1)required