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Sherlock's user avatar
Sherlock
  • Member for 1 year, 1 month
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  • 221B Baker Street, London.
7 votes
1 answer
719 views

What is the rank of a quantum channel?

6 votes
2 answers
465 views

How does the spectral decomposition of the Choi operator relate to Kraus operators?

6 votes
1 answer
465 views

Are nearly all pure two-qubit state entangled?

5 votes
1 answer
149 views

Prove that rank one projectors have the same partial trace iff they differ by a local unitary operation

5 votes
1 answer
96 views

What does "generator" mean in the master equation?

4 votes
1 answer
60 views

Why coherence measure monotonicity under selective incoherent operation should be form $C\left( \rho \right) \ge \sum_n{p_nC\left( \rho _n \right)}$?

4 votes
1 answer
201 views

Is a quantum channel reversible if all Kraus operators are proportional to unitaries?

3 votes
1 answer
30 views

Why does the condition $\langle \varphi _k\left( t \right) |\dot{\varphi}_l\left( t \right) \rangle =0$ called parallel transport condition?

2 votes
1 answer
127 views

What makes dynamical decoupling a good method since the fidelity after using it can only reach 0.85 or so?

2 votes
2 answers
283 views

What is the difference between "permutationally invariant" and "symmetric" states?

2 votes
1 answer
68 views

How to calculate the action of a channel on part of a quantum state?

2 votes
2 answers
263 views

How to understand intuitively the concavity of the binary entropy?

2 votes
1 answer
40 views

Direct sum in Eq.(25) of *A Grand Unification of Quantum Algorithms* should be changed into $\sum_\lambda$?

1 vote
1 answer
52 views

For bipartite mixed state, if one part is pure, then the global mixed state is a product state?