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Share Your Experience: Take the 2024 Developer Survey
Norbert Schuch's user avatar
Norbert Schuch's user avatar
Norbert Schuch's user avatar
Norbert Schuch
  • Member for 6 years, 2 months
  • Last seen this week
0 votes

For how many different times do I have to know that $e^{tL}$ is a quantum channel to conclude that $L$ is of Lindblad form?

4 votes

Represent Hadamard gate in terms of rotations and reflections in Bloch sphere

1 vote

Cirac-Zoller CNOT gate implemented by Schmidt-Kaler

2 votes

Can a SLOCC protocol work only in one direction?

3 votes

$U_1\oplus U_2$ decomposable into $I\oplus U$ and 1-qubit gates?

3 votes

$U_1\oplus U_2$ decomposable into $I\oplus U$ and 1-qubit gates?

1 vote

Efficient computation of probabilities for an N-particle state

4 votes

Can you decompose a 4-qubit Toffoli gate (CCCX) into basic gates without an ancillary state?

7 votes
Accepted

What can we say about the eigendecomposition of quantum channels?

1 vote

Is $\text{Tr}(\text{Tr}_\mathcal{E}(\rho)) = \text{Tr}(\rho)$?

4 votes
Accepted

Is purity an entanglement witness?

4 votes

Do stabilizer operations map stabilizer states to stabilizer states?

3 votes
Accepted

Is there a proof that any pure two-qubit Partially entangled state lies somewhere in between a separable and maximally entangled state?

6 votes
Accepted

Are there techniques to reduce the number of Pauli strings in a Hamiltonian?

2 votes

Quantum Information Retrieval from Bipartite Mixed States under LOCC: Maximizing Individual State Knowledge

2 votes

Is the trace distance upper bounded by the Euclidean distance?

2 votes

Does a quantum channel always preserve the identity matrix?

4 votes
Accepted

How many free real parameters in a general CPTP map?

4 votes
Accepted

Phase kickback without controlled operator

4 votes

Why are all Rényi entropies equal for Clifford dynamics?

3 votes

conditions for two hermitians operators same up to unitary

6 votes
Accepted

Why do stabilizer cut the Hilbert space into two halves?

2 votes
Accepted

How is geometric frustration different from (not) being frustration free?

1 vote

Prove that an entanglement witness satisfies $\operatorname{tr}(W)>0$ and $\operatorname{tr}(W)^2\ge \operatorname{tr}(W^2)$

1 vote

Equivalence of two unitary transformation with respect to local operations

3 votes
Accepted

If all terms of a local Hamiltonian commute, how hard is it to learn the ground state (energy)?

2 votes

For tetrapartite state, and another way of decomposition, is the Schmidt basis separable?

4 votes
Accepted

Does proximity of two bipartite states in a norm force high overlap between the elements of the Schmidt bases?

3 votes
Accepted

What is the "physical" Hilbert space for non-local Hamiltonians?

2 votes

What can we say about $\sum_i K_i K_i^\dagger$ for non-unital CPTP maps?

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