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Quantum Computing
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user1271772
  • Member for 5 years, 1 month
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  • Caltech
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195 Answers

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51 votes
Accepted

Is quantum computing just pie in the sky?

23 votes
Accepted

Introductory material for quantum machine learning

17 votes
Accepted

What is a list of research journals publishing quantum computing articles?

13 votes
Accepted

How can I decompose a matrix in terms of Pauli matrices?

12 votes
Accepted

What makes representing qubits in a 3D real vector space possible?

11 votes
Accepted

Is there a name for the 3-qubit gate that does NOT NOT NOTHING?

11 votes

How to implement the 4 Bell states on the IBM Q (composer)?

11 votes

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

10 votes

Can quantum computing be profitable without quantum hardware?

9 votes
Accepted

Why is the CNOT gate matrix a valid representation for two-qubit states?

9 votes
Accepted

Are there any estimates on how complexity of quantum engineering scales with size?

9 votes
Accepted

When was the first use of the word Entanglement?

9 votes

Is quantum computing just pie in the sky?

9 votes

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

9 votes

How does the NOT gate generalize beyond binary?

9 votes

Why do quantum computers have more qubits than classical computers have bits?

8 votes
Accepted

If a Hamiltonian is quadratic in the ladder operator, why is its time evolution linear in the ladder operator?

8 votes
Accepted

Why does QAOA achieve quantum supremacy in an algorithmic sense?

8 votes
Accepted

Is there an intuition built on ansatz in VQE algorithm or is it more a trial and error approach?

8 votes
Accepted

Does a Wigner function uniquely determine a quantum state?

7 votes

Why is the transpose of a density matrix positive and trace preserving?

7 votes

What are magic states?

7 votes
Accepted

How to translate the Hadamard gate matrix into Dirac notation?

7 votes
Accepted

HHL algorithm -- why isn't the required knowledge on eigenspectrum a major drawback?

7 votes
Accepted

Why Google has used $\sqrt{X}$ and $\sqrt{Y}$ instead of $X$ and $Y$ in supremacy experiment?

7 votes
Accepted

When you act on a multi-qubit system with a 2-qubit gate, what happens to the third qubit?

7 votes
Accepted

Quantum states are unit vectors... with respect to which norm?

7 votes
Accepted

What kind of mathematics is common in quantum computing?

7 votes

Toffoli gate as FANOUT

7 votes

Where exactly does entanglement appear in Shor's algorithm?

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