# This code is part of Qiskit.
#
# (C) Copyright IBM 2019.
#
# This code is licensed under the Apache License, Version 2.0. You may
# obtain a copy of this license in the LICENSE.txt file in the root directory
# of this source tree or at http://www.apache.org/licenses/LICENSE-2.0.
#
# Any modifications or derivative works of this code must retain this
# copyright notice, and modified files need to carry a notice indicating
# that they have been altered from the originals.
"""
Fake Tokyo device (20 qubit).
"""
import os
import json
from qiskit.providers.models import GateConfig, QasmBackendConfiguration, BackendProperties
from qiskit.providers.fake_provider.fake_backend import FakeBackend
[docs]class FakeTokyo(FakeBackend):
"""A fake 20 qubit backend."""
def __init__(self):
"""
.. code-block:: text
00 ↔ 01 ↔ 02 ↔ 03 ↔ 04
↕ ↕ ↕ ↕ ⤫ ↕
05 ↔ 06 ↔ 07 ↔ 08 ↔ 09
↕ ⤫ ↕ ↕ ⤫ ↕
10 ↔ 11 ↔ 12 ↔ 13 ↔ 14
↕ ↕ ⤫ ↕ ⤫ ↕
15 ↔ 16 ↔ 17 18 19
"""
cmap = [
[0, 1],
[0, 5],
[1, 0],
[1, 2],
[1, 6],
[1, 7],
[2, 1],
[2, 6],
[3, 8],
[4, 8],
[4, 9],
[5, 0],
[5, 6],
[5, 10],
[5, 11],
[6, 1],
[6, 2],
[6, 5],
[6, 7],
[6, 10],
[6, 11],
[7, 1],
[7, 6],
[7, 8],
[7, 12],
[8, 3],
[8, 4],
[8, 7],
[8, 9],
[8, 12],
[8, 13],
[9, 4],
[9, 8],
[10, 5],
[10, 6],
[10, 11],
[10, 15],
[11, 5],
[11, 6],
[11, 10],
[11, 12],
[11, 16],
[11, 17],
[12, 7],
[12, 8],
[12, 11],
[12, 13],
[12, 16],
[13, 8],
[13, 12],
[13, 14],
[13, 18],
[13, 19],
[14, 13],
[14, 18],
[14, 19],
[15, 10],
[15, 16],
[16, 11],
[16, 12],
[16, 15],
[16, 17],
[17, 11],
[17, 16],
[17, 18],
[18, 13],
[18, 14],
[18, 17],
[19, 13],
[19, 14],
]
configuration = QasmBackendConfiguration(
backend_name="fake_tokyo",
backend_version="0.0.0",
n_qubits=20,
basis_gates=["u1", "u2", "u3", "cx", "id"],
simulator=False,
local=True,
conditional=False,
open_pulse=False,
memory=False,
max_shots=65536,
max_experiments=900,
gates=[GateConfig(name="TODO", parameters=[], qasm_def="TODO")],
coupling_map=cmap,
)
super().__init__(configuration)
[docs] def properties(self):
"""Returns a snapshot of device properties as recorded on 8/30/19."""
dirname = os.path.dirname(__file__)
filename = "props_tokyo.json"
with open(os.path.join(dirname, filename)) as f_prop:
props = json.load(f_prop)
return BackendProperties.from_dict(props)