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Support sampling #3

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josh146 opened this issue Jul 29, 2019 · 0 comments

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josh146 commented Jul 29, 2019

With the latest development version of PennyLane, we now support returning samples from the QNode, as well as expectation values and variance:

@qml.qnode(dev)
def circuit(x):
    qml.RX(x, wires=0)
    qml.CNOT(wires=[0, 1])
    return expval(qml.PauliZ(0)), sample(qml.PauliZ(1))

Plugins can support this new feature by subclassing the Device.sample() method, returning the requested number of samples for a given observable.

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josh146 added the enhancement label

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