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Hello World: Euer erschte Quanteschaltkreis

Bout ene Bell-Zostand (zwei mitenander verschränkte Qubits) un loss en op drei Arte loufe:

  1. Ideale Simulation — perfekte Resultat, ohne Konto
  2. Simulation met Ruusch — simuleet e richtich Jerät, ohne Konto
  3. Richtije Quantehardware — bruch e IBM Quantum-Konto

Dä Schaltkreis boue​

from qiskit import QuantumCircuit

qc = QuantumCircuit(2)
qc.h(0)
qc.cx(0, 1)
qc.measure_all()

qc.draw(output="mpl")

Option 1: Ideale Simulation (ohne Konto)​

Bruch dä StatevectorSampler — ene lokale Simulator met perfekte, ruuschfreie Resultat.

from qiskit.primitives import StatevectorSampler

result = StatevectorSampler().run([qc], shots=1024).result()
counts = result[0].data.meas.get_counts()
counts
from qiskit.visualization import plot_histogram
plot_histogram(counts)

Option 2: Simulation met Ruusch (ohne Konto)​

Bruch FakeManilaV2 — ene lokale Simulator, dä e richtich IBM-Quantejerät nohmaht, och met singem Ruusch. Dä Schaltkreis moss zeerscht transpileet (aanjepasst) wäde, domet hä för et Gate-Set un de Qubit-Konnektivität vum Jerät passt.

from qiskit_ibm_runtime import SamplerV2
from qiskit_ibm_runtime.fake_provider import FakeManilaV2
from qiskit.transpiler.preset_passmanagers import generate_preset_pass_manager

backend = FakeManilaV2()
pm = generate_preset_pass_manager(backend=backend, optimization_level=1)
isa_qc = pm.run(qc)

result = SamplerV2(mode=backend).run([isa_qc], shots=1024).result()
counts = result[0].data.meas.get_counts()
counts
plot_histogram(counts)

Option 3: Richtije Quantehardware​

Bruch e IBM Quantum-Konto. Loor op Setting up your IBM Quantum account för de Details.

Wann de ding Zugangsdaate noch nit en dä Binder-Sitzung jespeichert häs, loor dat hee zeerscht:

from qiskit_ibm_runtime import QiskitRuntimeService

QiskitRuntimeService.save_account(
    token="<your-api-key>",
    instance="<your-crn>",
    overwrite=True
)

Opjepasst: Jobs op richtije Hardware künne jet duere, je nodäm wie lang de Waadschlang es. Wann die Zell noch lööf, kanns de dä Job-Status un de Resultat op quantum.cloud.ibm.com/workloads nohloore.

from qiskit_ibm_runtime import QiskitRuntimeService, SamplerV2
from qiskit.transpiler.preset_passmanagers import generate_preset_pass_manager

service = QiskitRuntimeService()
backend = service.least_busy(operational=True, simulator=False)
print(f"Running on {backend.name}")

pm = generate_preset_pass_manager(backend=backend, optimization_level=1)
isa_qc = pm.run(qc)

result = SamplerV2(mode=backend).run([isa_qc], shots=1024).result()
counts = result[0].data.meas.get_counts()
counts
plot_histogram(counts)

Wat kütt als Nächstes?​

  • Tutorials — Schrett-för-Schrett-Aanleitunge för Algorithme, Fählervermedung, Transpilation un mieh
  • Courses — Struktureete Läerpfäd vun Quantegrundlaage bes zo Utility-Scale-Computing
  • Local testing mode — de miehste Notebooks ohne IBM Quantum-Konto loufe losse