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Bertrand Einstein IV
  • Member for 1 year, 6 months
  • Last seen more than a month ago
  • N/A
  • Cambridge, UK
8 votes
Accepted

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

6 votes

How is a Toffoli gate built without using T gates?

5 votes
Accepted

Showing that $e^{i \sigma_z \otimes \sigma_z t} = \text{CNOT}(I \otimes e^{i \sigma_zt})\text{CNOT}$

5 votes
Accepted

Why are all the eigenvalues of a "Hermitian block-encoding" equal to $\pm1$?

5 votes

What's the 'physical consistency' in the partial trace scenario?

5 votes

Aren't qubits just ternary?

4 votes

What do the off-diagonal elements of a density matrix physically represent?

4 votes

Minimum number of 2 qubit gates to build any unitary

3 votes

How to theoretically compare the complexity of quantum and classical algorithms?

3 votes
Accepted

How do I determine if a given pure two-qubit state is separable?

3 votes

Gate SWAP vs Physical SWAP in Trapped Ions for chain reordering

3 votes
Accepted

How to combine/calculate for interference using density matrices?

2 votes
Accepted

Confusion regarding the tensor product usage in book

1 vote

Find expectation value of the observable $X_1\otimes Z_2$ for a maximally entangled two-qubit system

1 vote

Is there any possibility to draw graphs for a maximally entangled state?

1 vote

Is there some nice physical intuition to get for quantum teleportation

0 votes
Accepted

Why isn't FANIN required to be able to simulate all other elements in a classical circuit