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82 votes
6 answers
37k views

What programming languages are available for quantum computers?

  • 931
76 votes
7 answers
10k views

Are there emulators for quantum computers?

72 votes
3 answers
6k views

Can a Turing machine simulate a quantum computer?

57 votes
6 answers
4k views

What are the models of quantum computation?

  • 1,825
49 votes
6 answers
2k views

Programming quantum computers for non-physics majors

  • 957
44 votes
4 answers
11k views

How do I add 1+1 using a quantum computer?

  • 3,657
38 votes
3 answers
20k views

How do I show that a two-qubit state is an entangled state?

37 votes
2 answers
8k views

How does a quantum computer do basic math at the hardware level?

37 votes
2 answers
13k views

What is the "surface code" in the context of quantum error correction?

35 votes
2 answers
5k views

What is quantum gate teleportation?

  • 1,825
35 votes
3 answers
3k views

Can a quantum computer simulate a normal computer?

34 votes
12 answers
11k views

Currently, what are the best structured courses available online on quantum computing?

  • 505
33 votes
4 answers
12k views

What is meant by the term "computational basis"?

33 votes
2 answers
2k views

Why is a quantum computer in some ways more powerful than a nondeterministic Turing machine?

  • 2,107
32 votes
4 answers
8k views

Effects of quantum computing on parallel universes

  • 421
30 votes
1 answer
9k views

What exactly is an oracle?

30 votes
5 answers
5k views

How to derive the CNOT matrix for a 3-qubit system where the control & target qubits are not adjacent?

  • 3,918
29 votes
5 answers
3k views

What's the point of Grover's algorithm if we have to search the list of elements to build the oracle?

  • 715
27 votes
2 answers
2k views

What could be the possible future applications for HHL algorithm?

  • 4,542
27 votes
3 answers
9k views

How can I implement an n-bit Toffoli gate?

  • 1,562
27 votes
2 answers
1k views

Why is it important to eliminate the garbage qubits?

26 votes
3 answers
5k views

What is the difference between superpositions and mixed states?

  • 637
25 votes
2 answers
552 views

What is the status of confirming the existence of anyons?

  • 12.1k
25 votes
4 answers
5k views

Are quantum computers just a variant on Analog computers of the 50's & 60's that many have never seen nor used?

25 votes
4 answers
1k views

Is error correction necessary?

  • 3,341
24 votes
3 answers
3k views

Why do optical quantum computers not have to be kept near absolute zero while superconducting quantum computers do?

24 votes
2 answers
3k views

What is postselection in quantum computing?

24 votes
1 answer
800 views

Explicit Conversion Between Universal Gate Sets

  • 47.5k
23 votes
2 answers
5k views

What exactly are anyons and how are they relevant to topological quantum computing?

22 votes
3 answers
1k views

Is entanglement transitive?

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