change GlobalBackends() with get_backend() for compatibility with qib…

…o v0.2.13

src/qibocal/protocols/randomized_benchmarking/utils.py

@@ -7,7 +7,7 @@
 import numpy as np
 import numpy.typing as npt
 from qibo import gates
-from qibo.backends import GlobalBackend
+from qibo.backends import get_backend
 from qibo.config import raise_error
 from qibo.models import Circuit
 from qibolab.platform import Platform
@@ -352,7 +352,7 @@ def setup(
         tuple: A tuple containing the experiment data, noise model, and backend.
     """
 
-    backend = GlobalBackend()
+    backend = get_backend()
     backend.platform = platform
     # For simulations, a noise model can be added.
     noise_model = None

src/qibocal/protocols/readout_mitigation_matrix.py

@@ -5,7 +5,7 @@
 import numpy.typing as npt
 import plotly.express as px
 from qibo import gates
-from qibo.backends import GlobalBackend
+from qibo.backends import get_backend
 from qibo.models import Circuit
 from qibolab.platform import Platform
 from qibolab.qubits import QubitId
@@ -61,7 +61,7 @@ def _acquisition(
     data = ReadoutMitigationMatrixData(
         nshots=params.nshots, qubit_list=[list(qq) for qq in targets]
     )
-    backend = GlobalBackend()
+    backend = get_backend()
     backend.platform = platform
     transpiler = dummy_transpiler(backend)
     qubit_map = [i for i in range(platform.nqubits)]

src/qibocal/protocols/state_tomography.py

@@ -8,7 +8,7 @@
 import plotly.graph_objects as go
 from plotly.subplots import make_subplots
 from qibo import Circuit, gates
-from qibo.backends import GlobalBackend, NumpyBackend, matrices
+from qibo.backends import NumpyBackend, get_backend, matrices
 from qibo.quantum_info import fidelity, partial_trace
 from qibolab.platform import Platform
 from qibolab.qubits import QubitId
@@ -102,7 +102,7 @@ def _acquisition(
     if params.circuit is None:
         params.circuit = Circuit(len(targets))
 
-    backend = GlobalBackend()
+    backend = get_backend()
     backend.platform = platform
     transpiler = dummy_transpiler(backend)
 

src/qibocal/protocols/two_qubit_interaction/chsh/protocol.py

@@ -8,7 +8,7 @@
 import numpy as np
 import numpy.typing as npt
 import plotly.graph_objects as go
-from qibo.backends import GlobalBackend
+from qibo.backends import get_backend
 from qibolab import ExecutionParameters
 from qibolab.platform import Platform
 from qibolab.qubits import QubitId, QubitPairId
@@ -222,7 +222,7 @@ def _acquisition_circuits(
         bell_states=params.bell_states,
         thetas=thetas.tolist(),
     )
-    backend = GlobalBackend()
+    backend = get_backend()
     backend.platform = platform
     transpiler = dummy_transpiler(backend)
     if params.apply_error_mitigation:

src/qibocal/protocols/two_qubit_state_tomography.py

@@ -9,7 +9,7 @@
 import plotly.graph_objects as go
 from plotly.subplots import make_subplots
 from qibo import Circuit, gates
-from qibo.backends import GlobalBackend, NumpyBackend
+from qibo.backends import NumpyBackend, get_backend
 from qibo.quantum_info import fidelity, partial_trace
 from qibo.result import QuantumState
 from qibolab.platform import Platform
@@ -97,7 +97,7 @@ def _acquisition(
     if params.circuit is None:
         params.circuit = Circuit(len(qubits))
 
-    backend = GlobalBackend()
+    backend = get_backend()
     backend.platform = platform
     simulator = NumpyBackend()
     transpiler = dummy_transpiler(backend)

tests/test_task_options.py

@@ -4,7 +4,7 @@
 
 import pytest
 from pytest import approx
-from qibo.backends import GlobalBackend, set_backend
+from qibo.backends import get_backend, set_backend
 
 from qibocal import protocols
 from qibocal.auto.mode import AUTOCALIBRATION, ExecutionMode
@@ -20,7 +20,7 @@
 @pytest.fixture(scope="module")
 def platform():
     set_backend(backend="qibolab", platform="dummy")
-    return GlobalBackend().platform
+    return get_backend().platform
 
 
 TARGETS = [0, 1, 2]
@@ -107,7 +107,7 @@ def test_update_argument(platform, global_update, local_update, tmp_path):
     NEW_CARD = modify_card(
         UPDATE_CARD, local_update=local_update, global_update=global_update
     )
-    # platform = deepcopy(GlobalBackend().platform)
+    # platform = deepcopy(get_backend().platform)
     old_readout_frequency = platform.qubits[0].readout_frequency
     old_iq_angle = platform.qubits[1].iq_angle
     Runcard.load(NEW_CARD).run(

tests/test_transpile.py

@@ -1,6 +1,6 @@
 import numpy as np
 from qibo import Circuit, gates, set_backend
-from qibo.backends import GlobalBackend
+from qibo.backends import get_backend
 
 from qibocal.auto.transpile import (
     dummy_transpiler,
@@ -30,7 +30,7 @@ def test_execute_transpiled_circuit():
     circuit.add(gates.X(1))
     qubit_map = [1, 2]
     set_backend("qibolab", platform="dummy")
-    backend = GlobalBackend()
+    backend = get_backend()
     transpiler = dummy_transpiler(backend)
     transpiled_circuit, _ = execute_transpiled_circuit(
         circuit, qubit_map, backend, transpiler=transpiler
@@ -52,7 +52,7 @@ def test_execute_transpiled_circuits():
     circuit.add(gates.X(1))
     qubit_map = [1, 2]
     set_backend("qibolab", platform="dummy")
-    backend = GlobalBackend()
+    backend = get_backend()
     transpiler = dummy_transpiler(backend)
     transpiled_circuits, _ = execute_transpiled_circuits(
         [circuit], [qubit_map], backend, transpiler=transpiler