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Remove Tensor handling from device #170

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Nov 18, 2024
Merged

Remove Tensor handling from device #170

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0675bce
remove Tensor handling from device
lillian542 Nov 15, 2024
8cd8a46
trigger ci
lillian542 Nov 18, 2024
37da026
Update CHANGELOG.md
lillian542 Nov 18, 2024
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4 changes: 4 additions & 0 deletions CHANGELOG.md
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Expand Up @@ -6,6 +6,10 @@

### Breaking changes 💔

* Support for the `pennylane.operation.Tensor` observable is removed. This observable was deprecated,
and is fully removed in PennyLane 0.40.
[(#170)](https://github.com/PennyLaneAI/pennylane-rigetti/pull/170)

### Deprecations 👋

### Documentation 📝
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3 changes: 1 addition & 2 deletions pennylane_rigetti/qpu.py
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Expand Up @@ -24,7 +24,6 @@

import numpy as np
from pennylane.measurements import Expectation
from pennylane.operation import Tensor
from pennylane.ops import Prod
from pennylane.tape import QuantumTape
from pyquil import get_qc
Expand Down Expand Up @@ -142,7 +141,7 @@ def expval(self, observable, shot_range=None, bin_size=None):
pauli_obs = sZ(wire)

# Multi-qubit observable
elif len(device_wires) > 1 and isinstance(observable, (Tensor, Prod)):
elif len(device_wires) > 1 and isinstance(observable, Prod):
# All observables are rotated to be measured in the Z-basis, so we just need to
# check which wires exist in the observable, map them to physical qubits, and measure
# the product of PauliZ operators on those qubits
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