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QuestionEverything
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7 votes
Accepted

Trying to understand this measurement of a simple quantum circuit

5 votes
Accepted

How to obtain arbitrary distribution in quantum database

3 votes

What happens when I input two qubits starting at state $|00\rangle$ into a hadamard gate?

3 votes

Resources for quantum algorithm basics

3 votes

How do I calculate the von Neumann entropy of a pure one-qubit density matrix?

3 votes
Accepted

Tips on quantum cryptography?

3 votes
Accepted

Prove the subadditivity for the von Neumann entropy of a bipartite state

2 votes

Does it make sense to sum two Choi operators?

2 votes

Measurement interpretation - do individual operators get applied?

2 votes

How to calculate the conditional min-entropy via a semidefinite program?

2 votes

How do we physically initialize qubits in a Quantum register?

1 vote
Accepted

In the BB84 protocol, for what error thresholds can Alice and Bob not establish secure bits?

1 vote

How to prepare a superposed states of odd integers from $1$ to $\sqrt{N}$?

1 vote

A question about notation for quantum states

1 vote
Accepted

Can Dirac notation be used with 2 or more gates?

1 vote

How is the additivity of accessible information, $\frac{1}{n} I_{\rm acc}(\rho^{\otimes n})=I_{\rm acc}(\rho)$, proved?

1 vote

Can the following Bell states have probability amplitudes other than 1/2 and still be entangled?

1 vote

Quantum bit error rate

0 votes

Find probability of a single qubit's measurement results from a 5 qubit state