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draks ...
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6 votes
3 answers
763 views

Nielsen&Chuang 5-qubit quantum error-correction encoding gate

2 votes
1 answer
174 views

Cheap Toffoli gates with phase errors

3 votes
2 answers
115 views

Decomposition of $|110\rangle \leftrightarrow |000\rangle$ Exchange Gate

3 votes
0 answers
73 views

Reduced Density Matrix Equation of Motion to describe an Ellipse

3 votes
1 answer
91 views

Is the partial trace $\mathrm{Tr}_B(\rho)$ equal to $\sum_k \mathrm{Tr}[(\sigma_k\otimes I)^\dagger \rho]\sigma_k$?

1 vote
1 answer
61 views

Lower Bound to Measure Entanglement in Mixed States

1 vote
1 answer
92 views

Separability Criterion for Multipartite GHZ Quantum States

2 votes
2 answers
247 views

Is my $|0\rangle$ state mixed or pure?

3 votes
4 answers
227 views

Is there a separable state that is furthest away from an entangled one?

0 votes
0 answers
92 views

What is the best strategy to get an upper bound to measure $|00\cdots 0\rangle$?

2 votes
0 answers
20 views

Can we speed up the adiabatic process if we split the target hamiltonian in commuting parts?

4 votes
3 answers
248 views

What is the complexity of splitting a state into a superposition of $n$ computational basis states?

0 votes
2 answers
423 views

Generate a quantum state that sums up all permutations of elements

1 vote
1 answer
79 views

Any two level flip in $n$ qubit system