Hard Quantum Computing Quiz: Gates, Entanglement, and Error Correction

A rigorous nine-question test probing deep concepts in quantum computing, from circuit design to fault-tolerant strategies.

quantum gatesquantum decoherenceShor algorithmQFTfault tolerantquantum algorithmsentanglementerror correction
Difficulty:HARD

Quiz Details

Questions9
CategoryQuantum Physics
DifficultyHARD
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Quiz Questions

Answer all questions below and test your knowledge.

  1. 1

    Which single-qubit gate, together with the CNOT gate, forms a universal set for quantum computation?

    Question 1
  2. 2

    In the [[7,1,3]] Steane code, what does the distance parameter 3 indicate?

    Question 2
  3. 3

    The quantum Fourier transform on n qubits can be implemented using O(n^2) basic gates. What is the leading term of this gate count?

    Question 3
  4. 4

    How many Grover iterations are needed to find a marked item with high probability in a database of size N, assuming a single solution?

    Question 4
  5. 5

    What is the von Neumann entropy of either subsystem of a maximally entangled Bell pair?

    Question 5
  6. 6

    If the coherence time T2 of a qubit is 50 µs and each gate takes 25 ns, approximately how many sequential gates can be applied before decoherence dominates?

    Question 6
  7. 7

    Which classical subroutine is essential for the period-finding step in Shor's algorithm?

    Question 7
  8. 8

    Which anyon model underlies the most widely studied topological qubit platform?

    Question 8
  9. 9

    In measurement-based quantum computing, which highly entangled state serves as the universal resource?

    Question 9

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