quil: An instruction set for quantum computing
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This Haskell library implements the Quil language for quantum computing, as specified in "A Practical Quantum Instruction Set Architecture" <>, using the indexing conventions in <>.
Please report issues at <>.
Example
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This example creates a wavefunction for the [Bell state](https://en.wikipedia.org/wiki/Bell_state) and then performs a measurement on its highest qubit.
> import Control.Monad.Random (evalRandIO)
> import Data.Qubit ((^^*), groundState, measure)
> import Data.Qubit.Gate (h, cnot)
> -- Construct the Bell state.
> let bell = [h 0, cnot 0 1] ^^* groundState 2
> bell
0.7071067811865475|00> + 0.7071067811865475|11> @ [1,0]
> -- Measure the Bell wavefunction.
> bell' <- evalRandIO $ measure [1] bell
> bell'
([(1,0)],1.0|00> @ [1,0])
> -- Measure it again.
> evalRandIO $ measure [1] bell'
([(1,0)],1.0|00> @ [1,0])
> -- Measure another Bell wavefunction.
> evalRandIO $ measure [1] bell
([(1,0)],1.0|00> @ [1,0])
> -- Measure another Bell wavefunction.
> evalRandIO $ measure [1] bell
([(1,1)],1.0|11> @ [1,0])