Swap Test - Classiq Docs

Functions:

Name	Description
`swap_test`	[Qmod Classiq-library function].

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:

|\langle state1 | state2 \rangle |^2 = 2*Prob(test=0)-1

Parameters:

Name	Type	Description	Default
`state1`	`QArray[QBit]`	A quantum state to check its overlap with state2.	required
`state2`	`QArray[QBit]`	A quantum state to check its overlap with state1.	required
`test`	`Output[QBit]`	A qubit for which the probability of measuring 0 is $0.5*(\\|\langle state1 \\| state2 \rangle \\|^2+1)$	required

State Preparation Utility Functions

⌘I

​swap_test

swap_test