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Adam Zalcman's user avatar
Adam Zalcman's user avatar
Adam Zalcman's user avatar
Adam Zalcman
  • Member for 4 years, 1 month
  • Last seen this week
5 votes
Accepted

Can we understand multi-qubit gates in terms of rotation groups?

5 votes
Accepted

Quantum circuit for computing fidelity

5 votes
Accepted

Why do the eigenvectors of a spin observable not align with the direction of the spin?

5 votes
Accepted

Is there a "simple" way to tell if a stabilizer code is degenerate?

5 votes

Can EPR pairs be established with only classical communication?

5 votes
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Does closeness in trace distance imply close measurement outcomes?

5 votes
Accepted

Does the Eastin-Knill theorem hold for repetition codes?

5 votes

Non-universal gate sets

5 votes
Accepted

Showing that two unitary matrices are equal up to a global phase

5 votes

What is the motivation for using dual lattice in the surface code?

5 votes

How to deal with entanglement using quantum relativistic equations?

5 votes

What do commuting quantum channels look like?

5 votes
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Prove that $|(\langle \psi|_{A} \otimes \langle \phi|_{B})|\theta\rangle_{AB}|^{2}<1$ for entangled $|\theta\rangle_{AB}$

5 votes
Accepted

Open neighborhood of an entangled state with non-decreasing Schmidt rank

5 votes
Accepted

When is the square root of a Clifford gate a Clifford gate?

5 votes

What is the relation between the purity of a bipartite state and its subsystems?

5 votes
Accepted

What are the properties of stabilizer codes that ensure $C(S) = N(S)$?

5 votes

Show that conjugating $\text{CNOT}$ by $H\otimes H$ exchanges control and target qubits

5 votes
Accepted

Which qubit has the highest $|1\rangle$ amplitude?

5 votes
Accepted

Why does the definition of the oracle in Deutsch's algorithm fail to specify its action on superpositions?

5 votes
Accepted

What is the expectation value of $|\langle \psi|U|\psi \rangle|$ over Haar random states $|\psi\rangle$?

5 votes

Controlled Z gate entanglement

5 votes
Accepted

Generating random, but non-uniform state

5 votes
Accepted

Is a diagonal matrix with one non-zero element a measurable observable?

5 votes
Accepted

Does $\Phi(A^\dagger) = \Phi^\dagger(A)$?

5 votes
Accepted

Is there a circuit that takes two single-qubit states and reflects the second around the first?

5 votes
Accepted

Can Clifford gates be diagonalized using a gate from the third level of the Clifford hierarchy?

5 votes
Accepted

Does the standard 3 qubit code scheme admit a transversal implementation of $H$?

5 votes

How to recover the original density matrix from the output of amplitude damping channel?

4 votes
Accepted

How to show $T(\rho,\sigma)≥\sum_i|r_i − s_i|$ with $r_i,s_i$ eigenvalues of $\rho,\sigma$?

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