haoqindeng
commented
3 years ago The format of the issue is incorrect, I have submitted a newer version
Closed haoqindeng closed 3 years ago
haoqindeng
commented
3 years ago The format of the issue is incorrect, I have submitted a newer version
Informations
What is the current behavior?
We attempted to run the following code: backend = FakeAlmaden() fakealmaden_model = PulseSystemModel.from_backend(backend) and we get the following error:
(vqe) haoqindeng@LAPTOP-CE39QN05:/mnt/c/Users/haoqi/OneDrive/Desktop/QOC$ python qoc_test2.py line 45 Traceback (most recent call last): File "qoc_test2.py", line 46, in
fakealmaden_model = PulseSystemModel.from_backend(backend)
File "/home/haoqindeng/miniconda3/envs/vqe/lib/python3.7/site-packages/qiskit/providers/aer/pulse/system_models/pulse_system_model.py", line 106, in from_backend
return cls.from_config(config, subsystem_list)
File "/home/haoqindeng/miniconda3/envs/vqe/lib/python3.7/site-packages/qiskit/providers/aer/pulse/system_models/pulse_system_model.py", line 116, in from_config
hamiltonian = HamiltonianModel.from_dict(ham_string, subsystem_list)
File "/home/haoqindeng/miniconda3/envs/vqe/lib/python3.7/site-packages/qiskit/providers/aer/pulse/system_models/hamiltonian_model.py", line 130, in from_dict
system.parse(subsystem_list)
File "/home/haoqindeng/miniconda3/envs/vqe/lib/python3.7/site-packages/qiskit/providers/aer/pulse/system_models/string_model_parser/string_model_parser.py", line 97, in parse
coef, token = self._tokenizer(ham, qubit_list)
File "/home/haoqindeng/miniconda3/envs/vqe/lib/python3.7/site-packages/qiskit/providers/aer/pulse/system_models/string_model_parser/string_model_parser.py", line 183, in _tokenizer
opr = gen_oper(name, idx, self.dim_osc, self.dim_qub)
File "/home/haoqindeng/miniconda3/envs/vqe/lib/python3.7/site-packages/qiskit/providers/aer/pulse/system_models/string_model_parser/qobj_from_string.py", line 79, in gen_oper
return qobj_generators.tensor(opers)
File "/home/haoqindeng/miniconda3/envs/vqe/lib/python3.7/site-packages/qiskit/providers/aer/pulse/qutip_extra_lite/qobj_generators.py", line 101, in tensor
return ten.tensor(list_qobj)
File "/home/haoqindeng/miniconda3/envs/vqe/lib/python3.7/site-packages/qiskit/providers/aer/pulse/qutip_extra_lite/tensor.py", line 103, in tensor
out.data = zcsr_kron(out.data, q.data)
File "spmath.pyx", line 188, in qiskit.providers.aer.pulse.qutip_extra_lite.cy.spmath.zcsr_kron
File "spmath.pyx", line 422, in qiskit.providers.aer.pulse.qutip_extra_lite.cy.spmath._safe_multiply
OverflowError: value too large
Steps to reproduce the problem
import qiskit from qiskit import transpile, schedule as build_schedule from qiskit.test.mock import FakeAlmaden from qiskit import Aer, IBMQ, execute from qiskit import QuantumCircuit from qiskit.circuit import Gate
from qiskit import pulse from qiskit.ignis.characterization.calibrations import rabi_schedules, RabiFitter
from qiskit.pulse import DriveChannel from qiskit.compiler import assemble from qiskit.qobj.utils import MeasLevel, MeasReturnType
The pulse simulator
from qiskit.providers.aer import PulseSimulator
Object for representing physical models
from qiskit.providers.aer.pulse import PulseSystemModel
backend = FakeAlmaden() print(backend.configuration().hamiltonian)
schedule = build_schedule(transpiled_circ, backend)
circ = QuantumCircuit(2, 2) circ.x(0) circ.x(0) circ.x(1) circ.measure([0, 1], [0, 1])
schedule = build_schedule(circ, backend, method="as_late_as_possible")
backend_sim = PulseSimulator()
qobj = assemble(schedule, backend=backend_sim, meas_level=1, meas_return='avg', shots=1) print('line 45') fakealmaden_model = PulseSystemModel.from_backend(backend) print('line47') sim_result = backend_sim.run(qobj, fakealmaden_model).result()
What is the expected behavior?
We should be able to run the code at the line: fakealmaden_model = PulseSystemModel.from_backend(backend) instead of getting the error above.
Suggested solutions
Don't know how. Any ideas? @taalexander