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Add measurement gate #41

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9488287
feat: add measurement gate
stavros11 Jul 2, 2024
617ade9
refactor: simplify measurement results
stavros11 Jul 2, 2024
3d3c176
chore: drop MeasurementResult
stavros11 Jul 2, 2024
77ab54f
fix: don't use prelude in circuit.rs
stavros11 Jul 2, 2024
27755c3
test: add test involving measurements
stavros11 Jul 2, 2024
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3 changes: 3 additions & 0 deletions crates/py/examples/circuit.py
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,9 @@
c.add(gates.Y(), [4])
c.add(gates.X(), [4, 1])
c.add(gates.X(), [0])
c.add(gates.M(), [1])
c.add(gates.M(), [3])
c.add(gates.M(), [4])

print(c)

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148 changes: 0 additions & 148 deletions crates/py/qibo_core/measurements.py
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10 changes: 6 additions & 4 deletions crates/py/qibo_core/numpy.py
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Original file line number Diff line number Diff line change
Expand Up @@ -4,10 +4,12 @@
import numpy as np

from . import einsum_utils
from .qibo_core import gate
from .npmatrices import NumpyMatrices
from .result import CircuitResult, MeasurementOutcomes, QuantumState
from .config import SHOT_BATCH_SIZE

gates = gate.Gate

class NumpyBackend:
def __init__(self):
Expand Down Expand Up @@ -416,12 +418,12 @@ def execute_circuit(
state = self.cast(initial_state)

for gate, elements in circuit:
# TODO: Handle measurements and ``CallbackGate``
state = self.apply_gate(gate, elements, state, nqubits)
if not isinstance(gate, gates.M):
state = self.apply_gate(gate, elements, state, nqubits)

if len(circuit.measurements) > 0:
if len(circuit.measured_elements) > 0:
return CircuitResult(
state, circuit.measurements, backend=self, nshots=nshots
state, circuit.measured_elements, nshots=nshots, backend=self,
)
return QuantumState(state, backend=self)

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