QubimiQuantum ideas made visible

GUIDED LEARNING

Your quantum learning path

Move from a single qubit to algorithms and communication in five guided stages.

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You can still explore any experiment at any time.

After Stage 3, you can take Stage 4 or Stage 5 first.

  1. Stage 1

    Single-qubit states

    Prepare, rotate, flip, and measure a single qubit.

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    1. 01

      Quantum superposition

      Rotate one qubit into a coherent state with amplitudes for two outcomes.

      Beginner1 Qubit7 min
      Not startedOpen experiment
    2. 02

      Quantum bit flip

      Use the Pauli-X gate as the quantum version of NOT.

      Beginner1 Qubit5 min
      Not startedOpen experiment
    3. 03

      Measurement and sampling

      Turn state probabilities into single outcomes and repeated frequencies.

      Beginner1 Qubit7 min
      Not startedOpen experiment
    Stage milestone

    Predict measurement probabilities from a qubit’s state and rotation.

  2. Stage 2

    Phase, bases, and gate order

    Explore phase interference, measurement bases, and why gate order matters.

    Complete Stage 1 first for the clearest progression. You can still explore any experiment at any time.

    0/3Not started
    1. 04

      Phase and interference

      Make an invisible phase difference visible through interference.

      Beginner1 Qubit8 min
      Not startedOpen experiment
    2. 05

      Measurement bases

      Measure the same |+⟩ state in the Z or X basis and compare the outcomes.

      Beginner1 Qubit8 min
      Not startedOpen experiment
    3. 06

      Gate order matters

      Apply H and Z in opposite orders and reveal the difference in the X basis.

      Beginner1 Qubit8 min
      Not startedOpen experiment
    Stage milestone

    Explain how relative phase, basis choice, and gate order change outcomes.

  3. Stage 3

    Multi-qubit entanglement

    Use CNOT to build Bell and GHZ states and compare their correlations.

    Complete Stage 2 first for the clearest progression. You can still explore any experiment at any time.

    0/3Not started
    1. 07

      CNOT: from product state to Bell pair

      Let CNOT turn a superposed control and a |0⟩ target into a correlated two-qubit state.

      Beginner2 Qubits10 min
      Not startedOpen experiment
    2. 08

      Bell-state entanglement

      Link two qubits so same-basis measurements agree while each qubit remains locally random.

      Beginner2 Qubits10 min
      Not startedOpen experiment
    3. 09

      GHZ three-qubit entanglement

      Create one correlation shared coherently by three qubits.

      Intermediate3 Qubits12 min
      Not startedOpen experiment
    Stage milestone

    Read the correlations in two- and three-qubit entangled states.

  4. Stage 4

    Quantum information applications

    Apply teleportation, error correction, and BB84 to protect or transfer quantum information.

    Complete Stage 3 first for the clearest progression. You can still explore any experiment at any time.

    0/3Not started
    1. 10

      Quantum teleportation

      Transfer an unknown quantum state using entanglement and two classical bits.

      Intermediate3 Qubits14 min
      Not startedOpen experiment
    2. 11

      Three-qubit bit-flip code

      Protect one logical qubit by spreading it across three physical qubits.

      Intermediate3 Qubits15 min
      Not startedOpen experiment
    3. 12

      BB84 quantum key distribution

      Detect intercept-resend eavesdropping because measuring in an unknown basis creates errors.

      Intermediate1 Qubit14 min
      Not startedOpen experiment
    Stage milestone

    Explain what resource, check, or correction each protocol provides.

  5. Stage 5

    Quantum algorithms

    Trace Deutsch–Jozsa, Grover search, and QFT from circuit steps to useful output.

    Complete Stage 3 first for the clearest progression. You can still explore any experiment at any time.

    0/3Not started
    1. 13

      Deutsch–Jozsa algorithm

      With the promise that a function is constant or balanced, decide which using one quantum query.

      Intermediate3 Qubits12 min
      Not startedOpen experiment
    2. 14

      Grover search

      Amplify one marked answer—and see why the number of iterations matters.

      Intermediate2 Qubits13 min
      Not startedOpen experiment
    3. 15

      Quantum Fourier transform

      Turn an eight-point phase ramp into visible frequency bins.

      Advanced3 Qubits16 min
      Not startedOpen experiment
    Stage milestone

    Identify how each algorithm reshapes amplitude or phase to reveal an answer.

COMPUTING APPROACH LAB

Choose the right computing approach

Start with a real task, change its conditions, and see when CPU, GPU or QPU becomes the right fit.

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