User Mithrandir24601

33 votes

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

answered Mar 25, 2018 at 17:09

29 votes

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

answered Apr 9, 2018 at 20:34

21 votes

Twirling Quantum Channels: Pauli and Clifford Twirling

answered Jun 30, 2019 at 23:35

19 votes

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Why can't quantum annealing be described by a gate model?

answered Mar 15, 2018 at 1:10

14 votes

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What level of "confidence" of the result from a quantum computer is possible?

answered Mar 12, 2018 at 20:26

13 votes

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What exactly is meant by "noise" in the following context?

answered Mar 14, 2018 at 0:21

10 votes

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State produced by spontaneous parametric down-conversion (SPDC)

answered Mar 13, 2018 at 9:24

10 votes

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How does approximating gates via universal gates scale with the length of the computation?

answered Mar 20, 2018 at 2:26

9 votes

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How are gates implemented in a continuous-variable quantum computer?

answered Mar 31, 2018 at 17:27

8 votes

How should different quantum computing devices be compared?

answered Mar 22, 2018 at 0:39

8 votes

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What components are needed to realize a photonic CNOT gate?

answered Jun 30, 2018 at 18:25

7 votes

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Can quantum computers design quantum computers autonomously better than other methods?

answered Mar 23, 2018 at 20:05

7 votes

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How does Fourier sampling actually work (and solve the parity problem)?

answered Mar 17, 2018 at 11:15

7 votes

What does quantum error correction code notation stand for?

answered Apr 16, 2018 at 23:51

7 votes

How does the Grover diffusion operator work and why is it optimal?

answered Apr 5, 2018 at 18:56

6 votes

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Are qutrits more robust to decoherence?

answered Mar 30, 2018 at 9:13

6 votes

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Accessible information of system vs system, apparatus and environment

answered Apr 28, 2018 at 9:25

6 votes

'Rectilinear' and 'Diagonal' Basis in BB84 Protocol

answered May 16, 2018 at 21:34

5 votes

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Why or how is 'cat' state preparation via a C-not-not operation not fault tolerant?

answered Apr 22, 2018 at 8:42

5 votes

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What do we mean by parity of qubits?

answered Apr 22, 2018 at 20:32

5 votes

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A two qubit state in a special form

answered Feb 14, 2019 at 22:50

5 votes

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Is it possible to speed up the generation of the weighting matrix using a quantum algorithm?

answered Jun 18, 2018 at 9:07

5 votes

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PennyLane operations - Kerr, Displacement and Squeeze

answered Jan 29, 2020 at 15:34

4 votes

Why is the decomposition of a qubit-qutrit Hamiltonian in terms of Pauli and Gell-Mann matrices not unique?

answered May 27, 2018 at 9:00

4 votes

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Matrix representation of continuous-variable gates

answered Aug 1, 2018 at 22:27

4 votes

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Deduce the Kraus operators of the dephasing channel using the Choi

answered Nov 16, 2018 at 19:15

4 votes

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Eigenvalues of CPT operator

answered Jan 20, 2019 at 22:18

4 votes

Can the theory of quantum computation assist in the miniaturization of transistors?

answered Apr 18, 2018 at 0:37

4 votes

Why do error correction protocols only work when the error rates are already significantly low to begin with?

answered Mar 28, 2018 at 19:57

3 votes

Can we use quantum parallelism to calculate many functions at once?

answered Apr 2, 2018 at 9:37

Stack Exchange Network

40 Answers

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

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

Twirling Quantum Channels: Pauli and Clifford Twirling

Why can't quantum annealing be described by a gate model?

What level of "confidence" of the result from a quantum computer is possible?

What exactly is meant by "noise" in the following context?

State produced by spontaneous parametric down-conversion (SPDC)

How does approximating gates via universal gates scale with the length of the computation?

How are gates implemented in a continuous-variable quantum computer?

How should different quantum computing devices be compared?

What components are needed to realize a photonic CNOT gate?

Can quantum computers design quantum computers autonomously better than other methods?

How does Fourier sampling actually work (and solve the parity problem)?

What does quantum error correction code notation stand for?

How does the Grover diffusion operator work and why is it optimal?

Are qutrits more robust to decoherence?

Accessible information of system vs system, apparatus and environment

'Rectilinear' and 'Diagonal' Basis in BB84 Protocol

Why or how is 'cat' state preparation via a C-not-not operation not fault tolerant?

What do we mean by parity of qubits?

A two qubit state in a special form

Is it possible to speed up the generation of the weighting matrix using a quantum algorithm?

PennyLane operations - Kerr, Displacement and Squeeze

Why is the decomposition of a qubit-qutrit Hamiltonian in terms of Pauli and Gell-Mann matrices not unique?

Matrix representation of continuous-variable gates

Deduce the Kraus operators of the dephasing channel using the Choi

Eigenvalues of CPT operator

Can the theory of quantum computation assist in the miniaturization of transistors?

Why do error correction protocols only work when the error rates are already significantly low to begin with?

Can we use quantum parallelism to calculate many functions at once?