User Daniele Cuomo

11 votes

1 answer

1k views

What is the relationship between Choi and Chi matrix in Qiskit?

asked May 2, 2020 at 15:01

8 votes

2 answers

340 views

What is (formally) a transversal operator?

asked Feb 26, 2022 at 14:11

5 votes

2 answers

378 views

Are there ''interesting'' examples of circuits where gates can all commute each other?

asked Nov 9, 2021 at 11:00

4 votes

1 answer

222 views

Is there an efficient way to realize a Toffoli with control qubits fixed at $|+\rangle$?

asked Nov 30, 2020 at 12:21

4 votes

2 answers

218 views

Why does fault-tolerant transversal phase gate $P$ only work with doubly-even codes?

asked Mar 6, 2022 at 14:37

3 votes

1 answer

180 views

What is the smallest code for a single logical qubit

asked Apr 5, 2022 at 11:40

3 votes

2 answers

503 views

Commutation rules between Pauli $X$ and controlled-Hadamard

asked Feb 17, 2022 at 20:04

3 votes

2 answers

83 views

Optimising state tomography for fully entangled states

asked May 24, 2022 at 14:05

3 votes

1 answer

146 views

What does the identity operator represent when computing $\langle\varphi|I\otimes Z|\varphi\rangle$?

asked Feb 22, 2021 at 15:53

3 votes

1 answer

87 views

Tool to verify $CNOT$ (or any interacting 2-qubit gate)

asked May 26, 2021 at 11:15

3 votes

2 answers

285 views

Is it possible to push back an $H$ gate to a $CZ$ gate?

asked Jun 29, 2021 at 16:44

3 votes

2 answers

243 views

On the photonic implementation of Shor's code

asked Jun 14, 2022 at 19:12

3 votes

1 answer

298 views

How to calculate the average fidelity of Pauli error channel

asked Jul 20, 2022 at 14:07

3 votes

1 answer

152 views

Noise model correspondence to qiskit implementation for $CNOT$ gate

asked Jun 8, 2022 at 11:53

3 votes

2 answers

60 views

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

asked Dec 31, 2022 at 19:48

3 votes

1 answer

113 views

Small codes with transversal Hadamard

asked Jan 2 at 11:39

3 votes

2 answers

70 views

Can a $CX_{1,2}\cdot CX_{2,1}$ be synthesised to some $CU$ plus local gates?

asked Apr 12 at 18:07

2 votes

1 answer

47 views

How does an $\sqrt{X}$ error propagates through an $T$ gate?

asked May 16, 2022 at 12:00

2 votes

2 answers

167 views

State tomography on a subsystem of the GHZ state

asked Dec 7, 2022 at 16:38

2 votes

0 answers

20 views

Is there any error correction experimental set-up based on stationary-flying hybrid systems?

asked Feb 28 at 13:26

2 votes

1 answer

70 views

How to initialize a state of the form$\frac{1}{\sqrt{2}}(|\texttt{++}\rangle + |\texttt{--}\rangle$) in the circuit model?

asked Jun 18, 2022 at 12:39

2 votes

0 answers

118 views

Getting Choi-matrix of a subsystem

asked Nov 27, 2020 at 12:08

2 votes

1 answer

70 views

Is it possible to decompose $\land(UXU^\dagger)$ in one-qubit operations and only a single $\land(X)$?

asked Jul 6, 2021 at 22:54

2 votes

1 answer

360 views

Why do we require that the elements of a stabilizer group commute?

asked Jan 27, 2022 at 13:34

2 votes

1 answer

140 views

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

asked Jun 2, 2021 at 13:49

2 votes

1 answer

211 views

Vertex Cover mappings from QUBO to Ising and vice versa

asked Feb 17, 2021 at 13:26

2 votes

3 answers

1k views

Depth circuit optimization for 6-qubits GHZ state

asked May 4, 2022 at 14:58

2 votes

0 answers

33 views

What's the map from any linear classical codes to entanglement-assisted stabilizers codes

asked Feb 19, 2022 at 14:12

2 votes

1 answer

78 views

Kind of errors on entangled states

asked Feb 2, 2022 at 14:08

2 votes

0 answers

42 views

How to encode one stabilizer code for $H, CX, \sqrt{Z}$ operators

asked Mar 3, 2022 at 13:50

Stack Exchange Network

64 Questions

What is the relationship between Choi and Chi matrix in Qiskit?

What is (formally) a transversal operator?

Are there ''interesting'' examples of circuits where gates can all commute each other?

Is there an efficient way to realize a Toffoli with control qubits fixed at $|+\rangle$?

Why does fault-tolerant transversal phase gate $P$ only work with doubly-even codes?

What is the smallest code for a single logical qubit

Commutation rules between Pauli $X$ and controlled-Hadamard

Optimising state tomography for fully entangled states

What does the identity operator represent when computing $\langle\varphi|I\otimes Z|\varphi\rangle$?

Tool to verify $CNOT$ (or any interacting 2-qubit gate)

Is it possible to push back an $H$ gate to a $CZ$ gate?

On the photonic implementation of Shor's code

How to calculate the average fidelity of Pauli error channel

Noise model correspondence to qiskit implementation for $CNOT$ gate

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

Small codes with transversal Hadamard

Can a $CX_{1,2}\cdot CX_{2,1}$ be synthesised to some $CU$ plus local gates?

How does an $\sqrt{X}$ error propagates through an $T$ gate?

State tomography on a subsystem of the GHZ state

Is there any error correction experimental set-up based on stationary-flying hybrid systems?

How to initialize a state of the form$\frac{1}{\sqrt{2}}(|\texttt{++}\rangle + |\texttt{--}\rangle$) in the circuit model?

Getting Choi-matrix of a subsystem

Is it possible to decompose $\land(UXU^\dagger)$ in one-qubit operations and only a single $\land(X)$?

Why do we require that the elements of a stabilizer group commute?

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

Vertex Cover mappings from QUBO to Ising and vice versa

Depth circuit optimization for 6-qubits GHZ state

What's the map from any linear classical codes to entanglement-assisted stabilizers codes

Kind of errors on entangled states

How to encode one stabilizer code for $H, CX, \sqrt{Z}$ operators