Compatibility with the new Qibo global backend handling

pyproject.toml

@@ -18,7 +18,7 @@ classifiers = [
 [tool.poetry.dependencies]
 python = ">=3.9,<3.12"
 qibolab = "^0.1.8"
-qibo = "^0.2.12"
+qibo = { git = "https://github.com/qiboteam/qibo" }
 numpy = "^1.26.4"
 scipy = "^1.10.1"
 pandas = { version = "^2.2.2", extras = ["html"] }

src/qibocal/protocols/randomized_benchmarking/utils.py

@@ -6,8 +6,7 @@
 
 import numpy as np
 import numpy.typing as npt
-from qibo import gates
-from qibo.backends import GlobalBackend
+from qibo import gates, get_backend
 from qibo.config import raise_error
 from qibo.models import Circuit
 from qibolab.platform import Platform
@@ -69,7 +68,6 @@
 }
 
 NPULSES_PER_CLIFFORD = 1.875
-
 """
 Global phases that could appear in the Clifford group we defined in the "2q_cliffords.json" file
 due to the gates we selected to generate the Clifford group.
@@ -352,7 +350,7 @@ 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
@@ -402,7 +400,6 @@ def get_circuits(
             - circuits (list): List of generated circuits.
             - indexes (dict): Dictionary containing the random indexes for each qubit and depth.
             - npulses_per_clifford (float): Number of pulses per Clifford.
-
     """
     circuits = []
     indexes = {}
@@ -452,7 +449,6 @@ def execute_circuits(circuits, targets, params, backend, single_qubit=True):
 
     Returns:
         list: List of executed circuits.
-
     """
     # Execute the circuits
     transpiler = dummy_transpiler(backend)

src/qibocal/protocols/readout_mitigation_matrix.py

@@ -4,8 +4,7 @@
 import numpy as np
 import numpy.typing as npt
 import plotly.express as px
-from qibo import gates
-from qibo.backends import GlobalBackend
+from qibo import gates, get_backend
 from qibo.models import Circuit
 from qibolab import ExecutionParameters
 from qibolab.platform import Platform
@@ -97,7 +96,7 @@ 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

@@ -7,8 +7,8 @@
 import numpy as np
 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 import Circuit, gates, get_backend
+from qibo.backends import NumpyBackend, 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 import get_backend
 from qibolab import ExecutionParameters
 from qibolab.platform import Platform
 from qibolab.qubits import QubitId, QubitPairId
@@ -45,6 +45,7 @@ class CHSHParameters(Parameters):
 
     bell_states: list
     """List with Bell states to compute CHSH.
+
     The following notation it is used:
     0 -> |00>+|11>
     1 -> |00>-|11>
@@ -157,7 +158,6 @@ def __contains__(self, key: QubitPairId):
 
         While key is a QubitPairId both chsh and chsh_mitigated contain
         an additional key which represents the basis chosen.
-
         """
 
         return key in [(target, control) for target, control, _ in self.chsh]
@@ -220,7 +220,7 @@ def _acquisition_circuits(
         bell_states=params.bell_states,
         thetas=thetas.tolist(),
     )
-    backend = GlobalBackend()
+    backend = get_backend()
     backend.platform = platform
     transpiler = dummy_transpiler(backend)
     qubit_map = [i for i in range(platform.nqubits)]

src/qibocal/protocols/two_qubit_state_tomography.py

@@ -8,8 +8,8 @@
 import numpy as np
 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 import Circuit, gates, get_backend
+from qibo.backends import NumpyBackend
 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 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 +1,5 @@
 import numpy as np
-from qibo import Circuit, gates, set_backend
-from qibo.backends import GlobalBackend
+from qibo import Circuit, gates, get_backend, set_backend
 
 from qibocal.auto.transpile import (
     dummy_transpiler,
@@ -24,13 +23,12 @@ def test_padd_circuit():
 
 
 def test_execute_transpiled_circuit():
-
     circuit = Circuit(2)
     circuit.add(gates.X(0))
     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
@@ -46,13 +44,12 @@ def test_execute_transpiled_circuit():
 
 
 def test_execute_transpiled_circuits():
-
     circuit = Circuit(2)
     circuit.add(gates.X(0))
     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