User AHusain

11 votes

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How can I build a circuit to generate an equal superposition of 3 outcomes for 2 qubits?

answered Jun 12, 2018 at 12:46

10 votes

Why is an entangled qubit shown at the origin of a Bloch sphere?

answered Jan 8, 2019 at 23:38

9 votes

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Confusion on the definition of the phase-damping channel

answered Nov 27, 2018 at 0:58

9 votes

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Implementation of inverse QFT?

answered Dec 5, 2018 at 23:13

7 votes

What is the difference between a qudit system with d=4 and a two-qubit system?

answered Apr 22, 2018 at 3:30

7 votes

CNOT Gate on Entangled Qubits

answered Jul 16, 2018 at 17:17

7 votes

Automatic compilation of quantum circuits

answered Aug 26, 2018 at 19:06

7 votes

What would be the meaning of an $i$ in a qubit state $i\alpha|0\rangle+\beta|1\rangle$?

answered Jun 6, 2019 at 20:08

6 votes

Definition of the Pauli group and the Clifford group

answered Jul 14, 2019 at 23:23

6 votes

Accepted

Why is the quantum Fisher information for pure states $F_Q[\rho,A]=4(\Delta A)^2$?

answered Oct 16, 2019 at 23:19

6 votes

No-cloning theorem does not seem precise

answered Jul 25, 2019 at 19:47

5 votes

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How to decompose a controlled unitary $C(U)$ operation where $U$ is a 2-qubit gate?

answered Jun 3, 2019 at 19:41

5 votes

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Expressing CNOT in the eigenbasis of $X$ (Preskill lecture notes eq. 7.6)

answered Jun 5, 2019 at 3:00

5 votes

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Gate sequence for exponential of product of Pauli Z operators

answered Jan 10, 2019 at 0:35

5 votes

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How do I multiply an integer and a double in Q#?

answered Dec 30, 2018 at 4:23

5 votes

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Does conditional gate collapse controller's superposition?

answered Jul 20, 2018 at 0:17

5 votes

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Do any educational quantum computing toys or devices exist?

answered Oct 9, 2018 at 4:49

5 votes

What role does the non-commutativity of the tensor product play in experimental quantum computation?

answered Nov 5, 2018 at 13:14

4 votes

Can one ever find the elements of a superposition state?

answered Nov 8, 2018 at 19:52

4 votes

How many qubits does it take to break a 10 characters password?

answered Oct 2, 2018 at 14:15

4 votes

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Can vectorization lead to mixed states?

answered Dec 2, 2018 at 22:17

4 votes

Graphical Calculus for Quantum Circuits

answered Jul 16, 2018 at 1:41

4 votes

Shortest sequence of universal quantum gates that correspond to a given unitary

answered May 14, 2018 at 7:46

4 votes

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How to check if 2 qubits are entangled?

answered Jun 10, 2018 at 18:13

4 votes

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Square root of NOT as a time-dependent unitary matrix

answered Jul 4, 2018 at 18:20

4 votes

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Is qubit superposition a basis-dependent concept?

answered Jan 14, 2019 at 4:56

4 votes

The relationship between entanglement of vector states to matrix operations

answered Feb 24, 2019 at 21:50

4 votes

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Homeomorphism or stereographic projection corresponding to the set of mixed states within the Bloch sphere

answered Mar 3, 2019 at 0:17

4 votes

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Burnside Decomposition in Kuperberg's Hidden Shift

answered Apr 15, 2019 at 14:16

4 votes

What is the spectral decomposition of the Pauli $X$ gate?

answered May 17, 2019 at 19:59

Stack Exchange Network

84 Answers

How can I build a circuit to generate an equal superposition of 3 outcomes for 2 qubits?

Why is an entangled qubit shown at the origin of a Bloch sphere?

Confusion on the definition of the phase-damping channel

Implementation of inverse QFT?

What is the difference between a qudit system with d=4 and a two-qubit system?

CNOT Gate on Entangled Qubits

Automatic compilation of quantum circuits

What would be the meaning of an $i$ in a qubit state $i\alpha|0\rangle+\beta|1\rangle$?

Definition of the Pauli group and the Clifford group

Why is the quantum Fisher information for pure states $F_Q[\rho,A]=4(\Delta A)^2$?

No-cloning theorem does not seem precise

How to decompose a controlled unitary $C(U)$ operation where $U$ is a 2-qubit gate?

Expressing CNOT in the eigenbasis of $X$ (Preskill lecture notes eq. 7.6)

Gate sequence for exponential of product of Pauli Z operators

How do I multiply an integer and a double in Q#?

Does conditional gate collapse controller's superposition?

Do any educational quantum computing toys or devices exist?

What role does the non-commutativity of the tensor product play in experimental quantum computation?

Can one ever find the elements of a superposition state?

How many qubits does it take to break a 10 characters password?

Can vectorization lead to mixed states?

Graphical Calculus for Quantum Circuits

Shortest sequence of universal quantum gates that correspond to a given unitary

How to check if 2 qubits are entangled?

Square root of NOT as a time-dependent unitary matrix

Is qubit superposition a basis-dependent concept?

The relationship between entanglement of vector states to matrix operations

Homeomorphism or stereographic projection corresponding to the set of mixed states within the Bloch sphere

Burnside Decomposition in Kuperberg's Hidden Shift

What is the spectral decomposition of the Pauli $X$ gate?