Question

Subtracting a positive semidefinite matrix by a hermitian matrix

score 387 · Answer 1 · 2026-03-25 22:10:21

387

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Subtracting a positive semidefinite matrix by a hermitian matrix

Published on 25 Mar 2026 - 22:10

score 1.1k · Answer 2 · 2026-03-26 01:14:39

1.1k

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Factorizing an 8×8 unitary matrix into tensor product of three 2×2 unitaries

Published on 26 Mar 2026 - 1:14

score 107 · Answer 3 · 2023-01-29 14:18:02

107

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Sum of the Bessel function of the first kind to the 4th power

Published on 29 Jan 2023 - 14:18

score 38 · Answer 4 · 2026-03-25 22:03:59

38

Views

What are the projectors corresponding to the error syndrome measurement performed on a three qubit bit flip code?

Published on 25 Mar 2026 - 22:03

score 40 · Answer 5 · 2023-02-09 14:08:02

40

Views

prove that if operator P is in Lin(H), then the following are equivalent:

Published on 09 Feb 2023 - 14:08

score 152 · Answer 6 · 2023-02-10 11:22:47

152

Views

Why the Markov chain transition matrix doesn't have an eigenvalue $\lambda=1$?

Published on 10 Feb 2023 - 11:22

score 67 · Answer 7 · 2023-02-15 01:20:37

67

Views

bounds on $\frac{(\operatorname{Tr} H C)^2}{\operatorname{Tr} H^2 C}$

Published on 15 Feb 2023 - 1:20

score 81 · Answer 8 · 2023-02-21 09:51:15

81

Views

Simple expression for Haar measure of $U(N)$ and $SU(n)$

Published on 21 Feb 2023 - 9:51

score 127 · Answer 9 · 2023-02-25 07:20:35

127

Views

Definition of ground state?

Published on 25 Feb 2023 - 7:20

score 61 · Answer 10 · 2026-03-25 19:01:21

61

Views

Undergraduate resources for gates in quantum computing?

Published on 25 Mar 2026 - 19:01

score 199 · Answer 11 · 2023-03-07 05:39:52

199

Views

Fubini-Study metric as the natural metric in CP^n

Published on 07 Mar 2023 - 5:39

score 97 · Answer 12 · 2023-03-07 15:19:08

97

Views

prove that ${\rm tr}(\sqrt{\sqrt{AA^T}BB^T\sqrt{AA^T}})={\rm tr}(\sqrt{B^TAA^TB})$

Published on 07 Mar 2023 - 15:19

score 45 · Answer 13 · 2026-03-26 01:10:40

45

Views

If $\Phi$ is completely positive, then $\Phi\otimes\mathcal{I}$ is positve, is $\mathcal{I}\otimes\Phi$ also positive?

Published on 26 Mar 2026 - 1:10

score 128 · Answer 14 · 2023-03-12 09:36:13

128

Views

The norm $||A||=\max_{\langle u|u\rangle=1}|\langle u|A|u\rangle|$ for nondiagonalizable matrices

Published on 12 Mar 2023 - 9:36

score 103 · Answer 15 · 2026-03-25 22:02:38

103

Views

Intuition behind probability amplitudes, probabilities and Bloch sphere

Published on 25 Mar 2026 - 22:02

List Question

Subtracting a positive semidefinite matrix by a hermitian matrix

Factorizing an 8×8 unitary matrix into tensor product of three 2×2 unitaries

Sum of the Bessel function of the first kind to the 4th power

What are the projectors corresponding to the error syndrome measurement performed on a three qubit bit flip code?

prove that if operator P is in Lin(H), then the following are equivalent:

Why the Markov chain transition matrix doesn't have an eigenvalue $\lambda=1$?

bounds on $\frac{(\operatorname{Tr} H C)^2}{\operatorname{Tr} H^2 C}$

Simple expression for Haar measure of $U(N)$ and $SU(n)$

Definition of ground state?

Undergraduate resources for gates in quantum computing?

Fubini-Study metric as the natural metric in CP^n

prove that ${\rm tr}(\sqrt{\sqrt{AA^T}BB^T\sqrt{AA^T}})={\rm tr}(\sqrt{B^TAA^TB})$

If $\Phi$ is completely positive, then $\Phi\otimes\mathcal{I}$ is positve, is $\mathcal{I}\otimes\Phi$ also positive?

The norm $||A||=\max_{\langle u|u\rangle=1}|\langle u|A|u\rangle|$ for nondiagonalizable matrices

Intuition behind probability amplitudes, probabilities and Bloch sphere

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