User JSdJ

32 votes

Which subatomic particle does each company use in quantum computing?

answered Feb 27, 2020 at 20:45

23 votes

Accepted

What are magic states?

quantum-gate quantum-state error-correction universal-gates fault-tolerance

answered Sep 7, 2020 at 14:13

11 votes

Accepted

How to perform quantum state tomography on two qubits?

quantum-state measurement nielsen-and-chuang tomography

answered Dec 2, 2019 at 11:38

11 votes

What is a flying qubit?

communication terminology history

answered Nov 22, 2019 at 9:18

9 votes

How to build a quantum computer in your house?

physical-realization architecture

answered Jun 5, 2020 at 10:51

9 votes

Accepted

Characteristics of the IBM quantum computer

quantum-gate ibm-q-experience error-correction ibm

answered Apr 15, 2021 at 8:47

8 votes

Can quantum computer solve NP-complete problems?

complexity-theory

answered Mar 14, 2021 at 17:47

8 votes

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

qiskit quantum-operation tomography quantum-process-tomography

answered May 2, 2020 at 18:43

8 votes

Accepted

How to show that amount of qubits needed to crack the RSA-2048 protocol using Shor's algorithm?

shors-algorithm

answered Dec 19, 2020 at 15:28

7 votes

Accepted

Why are there eight $T$ magic state and twelve $H$ magic states?

magic-states

answered Sep 8, 2021 at 21:38

6 votes

Accepted

Why is the complexity of $n$-qubit state tomography not upper bounded as $O(3^n)$?

measurement tomography shadow-tomography

answered Aug 12, 2021 at 7:59

6 votes

Accepted

What's the observable when measuring multiple qubits in the computational basis?

measurement terminology projection-operator

answered Aug 19, 2020 at 13:35

6 votes

Is it right to think of superposition as just angle?

mathematics classical-computing superposition

answered May 8, 2020 at 15:43

5 votes

How to run an approximate simulation, and why

qiskit programming simulation

answered Jun 8, 2020 at 9:08

5 votes

Accepted

How to construct a CU3 gate using only CX and U3 gates?

quantum-gate gate-synthesis universal-gates

answered May 7, 2020 at 12:02

5 votes

Is Quantum Computing a problem for Cryptography?

mathematics cryptography

answered May 7, 2020 at 12:28

5 votes

Accepted

How to perform Quantum Process Tomography for three qubit gates?

quantum-gate nielsen-and-chuang density-matrix tomography quantum-process-tomography

answered Apr 26, 2020 at 13:00

5 votes

Accepted

What are examples of quantum computing platforms availble for free (other than IBM Q)?

ibm-q-experience physical-realization quantum-inspire

answered Apr 29, 2020 at 9:50

5 votes

Why does quantum error correction work?

error-correction fault-tolerance

answered Jan 6, 2020 at 14:13

5 votes

How to define a quantum channel for the partial trace?

quantum-operation

answered Nov 15, 2019 at 11:23

5 votes

Is spontaneous excitation possible?

quantum-state noise

answered Aug 10, 2020 at 15:59

5 votes

Accepted

Good references to learn magic state distillation for fault tolerance

error-correction resource-request fault-tolerance state-distillation magic-states

answered Sep 6, 2021 at 9:08

5 votes

Accepted

Does a photonic quantum computer control a single photon?

quantum-gate quantum-state physical-qubit photonics optical-quantum-computing

answered Nov 1, 2021 at 15:21

5 votes

On Cluster States: Measuring in $|+\rangle$ and $|-\rangle$ basis vs. some other computational basis

cluster-states

answered Apr 16, 2021 at 9:36

5 votes

Accepted

5 qubit codewords definition in terms of operators: Mermin

error-correction textbook-and-exercises

answered Feb 14, 2021 at 16:23

5 votes

Accepted

Logical bit-flip and Phase-flip operators of Shor’s 9-qubit code

shors-algorithm

answered Mar 31, 2021 at 18:53

5 votes

Accepted

Do global phases matter when a gate is converted into a controlled gate?

quantum-gate

answered Apr 7, 2021 at 13:07

4 votes

How can I factor Hadamard gates according to $U=e^{i\delta}R_x(\alpha)R_y(\beta)R_z(\gamma)$

quantum-gate textbook-and-exercises

answered Mar 23, 2021 at 11:15

4 votes

What is the largest number of stabilizers a pure state can have?

quantum-state pauli-gates stabilizer-code clifford-group stabilizer-state

answered Nov 29, 2021 at 11:10

4 votes

Is it possible to have access to real quantum computers that have more than 15 qubits for my master thesis?

physical-realization

answered Jan 28, 2021 at 14:24

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96 Answers

Which subatomic particle does each company use in quantum computing?

What are magic states?

How to perform quantum state tomography on two qubits?

What is a flying qubit?

How to build a quantum computer in your house?

Characteristics of the IBM quantum computer

Can quantum computer solve NP-complete problems?

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

How to show that amount of qubits needed to crack the RSA-2048 protocol using Shor's algorithm?

Why are there eight $T$ magic state and twelve $H$ magic states?

Why is the complexity of $n$-qubit state tomography not upper bounded as $O(3^n)$?

What's the observable when measuring multiple qubits in the computational basis?

Is it right to think of superposition as just angle?

How to run an approximate simulation, and why

How to construct a CU3 gate using only CX and U3 gates?

Is Quantum Computing a problem for Cryptography?

How to perform Quantum Process Tomography for three qubit gates?

What are examples of quantum computing platforms availble for free (other than IBM Q)?

Why does quantum error correction work?

How to define a quantum channel for the partial trace?

Is spontaneous excitation possible?

Good references to learn magic state distillation for fault tolerance

Does a photonic quantum computer control a single photon?

On Cluster States: Measuring in $|+\rangle$ and $|-\rangle$ basis vs. some other computational basis

5 qubit codewords definition in terms of operators: Mermin

Logical bit-flip and Phase-flip operators of Shor’s 9-qubit code

Do global phases matter when a gate is converted into a controlled gate?

How can I factor Hadamard gates according to $U=e^{i\delta}R_x(\alpha)R_y(\beta)R_z(\gamma)$

What is the largest number of stabilizers a pure state can have?

Is it possible to have access to real quantum computers that have more than 15 qubits for my master thesis?