Qiskit 1-Qubit Verification (Qiskit 2.x)

This repository contains a simple Qiskit program to verify installation and demonstrate the basics of quantum circuits using the AerSimulator.

📂 File

• Qiskit_1-qubit_Verify.ipynb → Jupyter notebook with code.

📝 Program Explanation

• Creates a 1-qubit quantum circuit.
• Applies a Hadamard gate (H) to put the qubit into superposition.
• Measures the qubit into a classical bit.
• Runs the circuit on the AerSimulator for 1024 shots.
• Prints the result counts (expected ~50% 0, ~50% 1).

Example output:

Counts: {'0': 503, '1': 521}

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🎯 Student Tasks

To strengthen understanding, try the following:

1. Change number of shots

   • Run with shots=10, 1000, and 10000.
   • Compare how close the results are to a 50–50 split.

2. Two-qubit superposition

   • Apply H to both qubits.
   • Expect outcomes: 00, 01, 10, 11 with ~25% each.

3. Entangled state (Bell state)

   qc.h(0)
   qc.cx(0, 1)
   qc.measure_all()

   • Expected: only 00 and 11.

4. Try an X gate

   • Replace H with X.
   • Expected: always 1.

5. Three-qubit superposition (challenge)

   • Apply H to all 3 qubits.
   • Expect 8 outcomes (000 → 111) with ~12.5% each.

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🚀 Getting Started

1. Install Qiskit:

   pip install qiskit qiskit-aer

2. Open the notebook:

   jupyter notebook Qiskit_1-gubit_Verify.ipynb

3. Run the cells and explore the results!

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👨‍🏫 This notebook can be used as a classroom demo to introduce:

• Quantum circuits
• Superposition
• Measurement outcomes
• Entanglement basics