User user1936752 - Quantum Computing Stack Exchange

user1936752

Member for 3 years, 7 months
Last seen more than a week ago

5 Answers

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4 votes

Accepted

Is the quantum state fidelity defined as $F(\rho, \sigma)=\text{tr}\sqrt{\rho^{1/2}\sigma\rho^{1/2}}$ or its square?

quantum-state density-matrix nielsen-and-chuang fidelity trace-distance

answered Apr 14, 2020 at 20:39

2 votes

Accepted

What's the interpretation of the eigenvalues of qubit's projective operators?

measurement projection-operator

answered Apr 21, 2020 at 14:59

1 vote

Is the set of density operators invariant under the induced action of the unitary group?

density-matrix

answered Apr 12, 2020 at 18:53

0 votes

The correct set of measurement operators on a mutiple qubit system

quantum-state measurement tensor-product

answered Aug 8, 2019 at 18:39

0 votes

Bounding diamond norm distance using probability of error in transmission of classical information

quantum-operation classical-quantum channel-capacity diamond-norm

answered Aug 1, 2021 at 17:36