Technology & Programming

Quantum Information Theory and Practice 2026

Ten challenging questions for quantum computing specialists, focusing on theoretical foundations and recent practical advances in the field.

#NISQ#quantumcomplexity#quantumsupremacy#faulttolerance#quantumalgorithms#QEC2026

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Total Questions

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hard

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Quiz Questions

Answer all questions below and test your knowledge.

1
Which of the following best characterizes the complexity class QMA?
Question 1
2
In the surface code for quantum error correction, what is the code distance 'd' defined as?
Question 2
3
According to the Solovay-Kitaev theorem, what is the asymptotic gate complexity for approximating an arbitrary single-qubit unitary with a finite universal gate set?
Question 3
4
What is a fundamental theoretical obstacle to directly applying Grover's search algorithm for unstructured database search on a classical RAM model encoded in a quantum state?
Question 4
5
Which statement accurately describes the DiVincenzo criteria for a scalable quantum computer?
Question 5
6
In the context of variational quantum algorithms (VQAs) like VQE, what is the 'barren plateau' phenomenon?
Question 6
7
What does the HHL algorithm (after Harrow, Hassidim, and Lloyd) provide, in principle?
Question 7
8
Which of these is a defining feature of a 'boson sampler' as a model for demonstrating quantum computational advantage?
Question 8
9
In quantum complexity theory, what is the relationship believed to hold between BQP and PH (the Polynomial Hierarchy)?
Question 9
10
As of 2026, what is a primary engineering challenge for achieving fault-tolerant quantum computation with superconducting qubits?
Question 10

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Quantum Information Theory and Practice 2026

Quiz Intelligence

Quiz Questions

Which of the following best characterizes the complexity class QMA?

In the surface code for quantum error correction, what is the code distance 'd' defined as?

According to the Solovay-Kitaev theorem, what is the asymptotic gate complexity for approximating an arbitrary single-qubit unitary with a finite universal gate set?

What is a fundamental theoretical obstacle to directly applying Grover's search algorithm for unstructured database search on a classical RAM model encoded in a quantum state?

Which statement accurately describes the DiVincenzo criteria for a scalable quantum computer?

In the context of variational quantum algorithms (VQAs) like VQE, what is the 'barren plateau' phenomenon?

What does the HHL algorithm (after Harrow, Hassidim, and Lloyd) provide, in principle?

Which of these is a defining feature of a 'boson sampler' as a model for demonstrating quantum computational advantage?

In quantum complexity theory, what is the relationship believed to hold between BQP and PH (the Polynomial Hierarchy)?

As of 2026, what is a primary engineering challenge for achieving fault-tolerant quantum computation with superconducting qubits?

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