Adam Zalcman's user avatar
Adam Zalcman's user avatar
Adam Zalcman's user avatar
Adam Zalcman
  • Member for 4 years
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6 votes
Accepted

What are the transversal gates of Shor's $[\![9,1,3]\!]$ code?

6 votes
Accepted

Does the circuit with qubit-wise CZ gates compute the inner product of two states? If not, is there another circuit that does?

6 votes
Accepted

How to find the distance between a given $\rho$ and the nearest pure state(s)?

6 votes

How to construct the two qubit gate generated by the Hamiltonian $H= X\otimes X + Y \otimes Y + Z \otimes Z $?

6 votes
Accepted

How to limit the error probability in large scale quantum computers

6 votes

What gate combinations create entangled two-qubit states?

6 votes
Accepted

Why can any density operator be written this way? (quantum tomography)

6 votes
Accepted

How do I derive Stinespring and Kraus representations of a map such that $\Lambda(\rho)=|0\rangle\langle0|$ for all $\rho$?

6 votes

How does the NOT gate generalize beyond binary?

5 votes
Accepted

Is there an identity for the partial transpose of a product of operators?

5 votes
Accepted

Is a projective measurements over a superposition of eigenstates possible?

5 votes
Accepted

How do you transmit a single qubit of an entangled qubit over?

5 votes
Accepted

Can quantum error correction work on any type of channel?

5 votes
Accepted

Why does joint ground state not change under action of beam splitting unitary operator?

5 votes
Accepted

Can we express $\mathrm{tr}_A((A\otimes B)\rho_{AB})$ in terms of $A$, $B$, $\rho_A$ and $\rho_B$?

5 votes
Accepted

Can I freely rearrange the controlled-shift gates in this 3-qubit circuit?

5 votes
Accepted

How can I prove inequality from 4.66 to 4.67 in Nielsen and Chuang's book?

5 votes

Quantum capacity for serial composition of quantum channels

5 votes
Accepted

Can I use Grover's algorithm for a function that has multiple arguments which satisfy it?

5 votes
Accepted

If $C$ is a Clifford circuit, is there necessarily a Clifford circuit $C'$ such that $CT=TC'$?

5 votes
Accepted

How do we find the stabilizer generators for the three-qubit bit-flip code spanned by $|000\rangle$ and $|111\rangle$?

5 votes

How is a two qubit mixed state represented in the form of Bloch vector?

5 votes
Accepted

How to generalize the relationship HXH = Z for higher dimensions

5 votes
Accepted

Can Shor‘s code correct two- or three-qubit errors?

5 votes
Accepted

Why isn't output of Deutsch–Jozsa Algorithm simply $|0\rangle$?

5 votes

How to show that Bell states are orthonormal

5 votes
Accepted

Computing expectation value of $|\langle z|C|0^n\rangle|^2$ over Haar random circuit

5 votes
Accepted

How to interpret complex probability of superposition state?

5 votes

Application of QFT to Order-finding

5 votes
Accepted

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

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