How to Use Qiskit to Run Your First Quantum Algorithm
🧪 How to Use Qiskit to Run Your First Quantum Algorithm
🧠 What is Qiskit?
Qiskit is an open-source framework developed by IBM for quantum computing using Python. It allows you to create, simulate, and run quantum circuits on real quantum computers or simulators.
✅ Requirements Before You Start
1. Basic knowledge of Python
2. Install Qiskit
You can install Qiskit via pip:
pip install qiskit
🚀 Step-by-Step: Run Your First Quantum Algorithm
We’ll build and run a simple quantum circuit that puts a qubit in superposition using the Hadamard gate and measures the output.
🔹 Step 1: Import Qiskit Modules
from qiskit import QuantumCircuit, transpile, Aer, execute
from qiskit.visualization import plot_histogram
import matplotlib.pyplot as plt
🔹 Step 2: Create a Quantum Circuit
We'll create a circuit with 1 qubit and 1 classical bit:
qc = QuantumCircuit(1, 1)
🔹 Step 3: Add Quantum Gates
Apply a Hadamard (H) gate to put the qubit into superposition, then measure it:
qc.h(0) # Apply Hadamard gate to qubit 0
qc.measure(0, 0) # Measure qubit 0 and store the result in classical bit 0
🔹 Step 4: Visualize the Circuit (Optional)
qc.draw('mpl') # 'mpl' gives a nice matplotlib-based circuit diagram
plt.show()
🔹 Step 5: Choose a Simulator
Use Qiskit’s built-in Aer simulator to simulate the circuit:
simulator = Aer.get_backend('qasm_simulator')
🔹 Step 6: Execute the Circuit
Run the circuit on the simulator:
job = execute(qc, simulator, shots=1000) # Run 1000 times
result = job.result()
counts = result.get_counts(qc)
print("Measurement Results:", counts)
🔹 Step 7: Visualize the Results
plot_histogram(counts)
plt.show()
You should see a histogram showing a ~50/50 split between results '0' and '1'—demonstrating quantum superposition!
🌐 Step 8 (Optional): Run on a Real Quantum Computer
Create an IBM Quantum account:
Go to https://quantum-computing.ibm.com
and sign up.
Save your IBM token locally:
from qiskit_ibm_provider import IBMProvider
IBMProvider.save_account('YOUR_API_TOKEN', overwrite=True)
Run the circuit on a real quantum backend:
provider = IBMProvider()
backend = provider.get_backend('ibmq_qasm_simulator') # Or choose a real device
job = execute(qc, backend, shots=1000)
result = job.result()
counts = result.get_counts(qc)
plot_histogram(counts)
plt.show()
🎯 Conclusion
You’ve just run your first quantum algorithm using Qiskit! Even though this was a simple example, it lays the foundation for more advanced topics like:
Quantum entanglement
Quantum teleportation
Quantum algorithms (e.g., Grover's or Shor's)
📚 Next Steps
Explore Qiskit tutorials: https://qiskit.org/learn
Learn about quantum gates and circuits
Try multi-qubit circuits and entanglement
Learn Quantum Computing Training in Hyderabad
Read More
Quantum Computing Projects for College Students
How to Build Your First Quantum Circuit Step-by-Step
Top Beginner Quantum Computing Projects to Try
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