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Craig Gidney
  • Member for 11 years, 5 months
  • Last seen more than a week ago
133 votes
Accepted

In a roller coaster, does the rear car have a higher acceleration/speed?

12 votes
Accepted

Delayed Choice Quantum Eraser: Am I missing something here?

10 votes
Accepted

quantum clone of orthogonal quantum states

10 votes
Accepted

Why do quantum gates have to be reversible?

10 votes

Quantum circuit for a $3$-qubit $|W \rangle$ state

9 votes

How do we imagine a Hadamard gate acting on the Bloch Sphere?

8 votes

Visual interpretation, on the Bloch sphere, when Hadamard gate is applied twice

7 votes

Will quantum computing provide any advantage for storing large amounts of data?

7 votes

Is the partial trace of a mixed state always mixed? If not, are there natural examples where the partial trace of a mixed state is a pure state?

7 votes

What is quantum about the no-cloning theorem?

7 votes
Accepted

How is quantum teleportation any better than regular transfer of information?

7 votes
Accepted

Quantum Grover's algorithm: constructing the black box gate

7 votes

Double slit experiment; evidence of wavefunction collapse

7 votes

Complexity of quantum simulation

6 votes
Accepted

How does quantum superposition make calculation faster?

6 votes

Are the 'clock' and 'shift' operators used in Qudit codes physically realizable?

6 votes

How can a quantum logic gate produce a value other than $0$ or $1$?

6 votes

What is the use of a Universal-NOT gate?

6 votes

Shor's algorithm - why doesn't the final collapse of the auxiliary qubits cripple the computation?

5 votes
Accepted

Parity Measurement Using a Single c-Z gate

5 votes

Why does the distributive law fail in quantum logic?

5 votes
Accepted

How can all information be localized if local realism is dead?

5 votes

Why is a two-qubit state described by a point in a 15-dimensional space?

5 votes

Can every density operator be written as an outer product of two vectors?

4 votes

Invariance of a maximally entangled state under unitary operation $U \otimes U^\dagger$

4 votes
Accepted

Is QC with Superpositioned Quantum Gates any different than normal Quantum Computation?

4 votes

Why is $\theta \over 2$ used for a Bloch sphere instead of $\theta$?

4 votes
Accepted

Simulating Toffoli Gates with Fredkin Gates with no garbage bits

4 votes
Accepted

Delayed Choice Quantum Eraser without retrocausality?

3 votes
Accepted

If ABR is a pure state, why S(A,B) = S(R), where S is the Von Neumann entropy?

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