Norbert Schuch's user avatar
Norbert Schuch's user avatar
Norbert Schuch's user avatar
Norbert Schuch
  • Member for 6 years, 1 month
  • Last seen this week
2 votes
Accepted

Finding the maximum number of Q# simulatable qubits

2 votes

Tensor product between operators

2 votes

$R_z$ gate representations

2 votes

Can a Kraus representation act as the identity on any operator?

2 votes
Accepted

Given a channel $\Phi(X)=\sum_k c_k(X)\sigma_k$, are there always $F_k\ge0$ such that $\Phi(X)=\sum_k \operatorname{tr}(F_k X)\sigma_k$?

2 votes

Is there a way to construct a quantum circuit/oracle to check if 2 qubits in an unknown pure state are entangled?

2 votes

Why does one need a non-commuting Hamiltonian for an algorithm to exhibit "quantumness"

2 votes
Accepted

Are two outputs of a quantum operation (CPTP map) themselves related by a quantum operation?

2 votes
Accepted

What does a "Choi state" where we relax the partial trace condition represent?

2 votes

Prove that for one-qubit unitaries $\text{Tr}|U-V|=2\max_\psi\|(U-V)|\psi\rangle\|$

2 votes
Accepted

Can pairwise entanglement be converted into tripartite correlations?

1 vote
Accepted

Understanding proof of joint concavity of the (root) fidelity

1 vote

Further entangling two ebits to obtain $|0000\rangle + |1111\rangle$ state

1 vote
Accepted

Is entanglement nonincreasing on average by local operations for all possible ensemble decompositions?

1 vote

Implementing Partial Trace in IBMs quantum computer

1 vote
Accepted

Quantum operation to get rid of small but nonzero eigenvalues

1 vote

Pauli Identity Using Tensor Network Notation

1 vote

Deriving a controlled Kraus operator from an uncontrolled Kraus operator

1 vote

What exactly are "quantum rotors"?

1 vote

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

1 vote

Efficient computation of probabilities for an N-particle state

1 vote

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

1 vote

Does the inequality $\mathrm{tr}(L^\dagger L \rho^2)-\mathrm{tr}(L^\dagger \rho L\rho )\geq 0$ hold generally?

1 vote

Can separable, but non-valid "states", be used as a resource to generate entanglement?

1 vote
Accepted

How best to prepare a uniform superposition over all strings of balanced parentheses?

1 vote
Accepted

How can one impliment Bennett's partial measurement onto a binomial subspace for state distillation?

1 vote

What is the minimum set of primitive operations for a quantum computer?

0 votes

Estimating imaginary part of an inner product of two quantum states

0 votes

Equivalence of two unitary transformation with respect to local operations

0 votes

What is the correct sign in the unitary evolution operator of a beam splitter?

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