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Small fix in the syntax of jax.vmap #6668

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merged 2 commits into from
Dec 4, 2024
Merged

Small fix in the syntax of jax.vmap #6668

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0aac471
Fixing test and synthax
PietropaoloFrisoni Dec 4, 2024
80a19ce
Linking pull request number
PietropaoloFrisoni Dec 4, 2024
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1 change: 1 addition & 0 deletions doc/releases/changelog-dev.md
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Original file line number Diff line number Diff line change
Expand Up @@ -150,6 +150,7 @@ added `binary_mapping()` function to map `BoseWord` and `BoseSentence` to qubit
* `jax.vmap` can be captured with `qml.capture.make_plxpr` and is compatible with quantum circuits.
[(#6349)](https://github.com/PennyLaneAI/pennylane/pull/6349)
[(#6422)](https://github.com/PennyLaneAI/pennylane/pull/6422)
[(#6668)](https://github.com/PennyLaneAI/pennylane/pull/6668)

* `qml.capture.PlxprInterpreter` base class has been added for easy transformation and execution of
pennylane variant jaxpr.
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2 changes: 1 addition & 1 deletion pennylane/workflow/_capture_qnode.py
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Expand Up @@ -112,7 +112,7 @@ def qfunc(*inner_args):

# pylint: disable=protected-access
return jax.vmap(partial(qnode._impl_call, shots=shots), batch_dims[n_consts:])(
*jax.tree_util.tree_leaves(non_const_args)
*non_const_args
)

# pylint: disable=protected-access
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2 changes: 1 addition & 1 deletion tests/capture/test_capture_qnode.py
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Expand Up @@ -909,7 +909,7 @@ def workflow4(y, x, z):
assert len(eqn.outvars) == 1
assert eqn.outvars[0].aval.shape == (3,)

result = jax.core.eval_jaxpr(jaxpr.jaxpr, jaxpr.consts, x, y, 1)
result = jax.core.eval_jaxpr(jaxpr.jaxpr, jaxpr.consts, x["arr"], y, 1)
expected = jax.numpy.array([0.93005586, 0.00498127, -0.88789978]) * y
assert jax.numpy.allclose(result[0], expected)
assert jax.numpy.allclose(result[1], expected)
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