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Fixes for 0.31 release #835

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merged 8 commits into from
Jun 23, 2023
Merged

Fixes for 0.31 release #835

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499380f
Updated ensemble demo
mudit2812 Jun 22, 2023
855d016
Merge branch 'dev' into 0.31_changes_mp
mudit2812 Jun 22, 2023
dabb699
Trigger ci
mudit2812 Jun 22, 2023
ef55a10
Update circuit cutting demo
mudit2812 Jun 22, 2023
455dd1d
Updated stop_recording
mudit2812 Jun 22, 2023
b24d848
Update tutorial to not rely on tape context
mudit2812 Jun 23, 2023
f81cf58
Update demonstrations/tutorial_quantum_circuit_cutting.py
mudit2812 Jun 23, 2023
bfeafc4
Merge branch 'dev' into 0.31_changes_mp
mudit2812 Jun 23, 2023
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31 changes: 16 additions & 15 deletions demonstrations/tutorial_quantum_circuit_cutting.py
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Original file line number Diff line number Diff line change
Expand Up @@ -658,28 +658,29 @@ def make_kraus_ops(num_wires: int):
# In code, this looks like:
#

with QuantumTape(do_queue=False) as tape0, QuantumTape(do_queue=False) as tape1:
# Record on new "fragment" tapes
with qml.queuing.QueuingManager.stop_recording():
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with QuantumTape() as tape0, QuantumTape() as tape1:
# Record on new "fragment" tapes

for op in tape:
for op in tape:

if isinstance(op, qml.WireCut): # If the operation is a wire cut, replace it
if isinstance(op, qml.WireCut): # If the operation is a wire cut, replace it

k = len(op.wires)
d = 2**k
k = len(op.wires)
d = 2**k

K0, K1 = make_kraus_ops(k) # Generate Kraus operators on the fly
probs = (d + 1) / (2 * d + 1), d / (2 * d + 1) # Probabilities of the two channels
K0, K1 = make_kraus_ops(k) # Generate Kraus operators on the fly
probs = (d + 1) / (2 * d + 1), d / (2 * d + 1) # Probabilities of the two channels

psi_0 = qml.QubitChannel(K0, wires=op.wires, do_queue=False)
psi_1 = qml.QubitChannel(K1, wires=op.wires, do_queue=False)
psi_0 = qml.QubitChannel(K0, wires=op.wires)
psi_1 = qml.QubitChannel(K1, wires=op.wires)

qml.apply(psi_0, context=tape0)
qml.apply(psi_1, context=tape1)
qml.apply(psi_0, context=tape0)
qml.apply(psi_1, context=tape1)

else: # Otherwise, just apply the existing gate
qml.apply(op, context=tape0)
qml.apply(op, context=tape1)
else: # Otherwise, just apply the existing gate
qml.apply(op, context=tape0)
qml.apply(op, context=tape1)


######################################################################
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