List questions from unitary-matrices

Published on 10 Nov 2023 - 3:38

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Unitary transformation to triangularize 2 matrices at the same time

Published on 25 Mar 2026 - 3:18

55

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Show that $U^* A U$ is upper triangular, with $A$ upper triangular, and $U$ unitary and lower-Hessenberg

Published on 25 Mar 2026 - 5:05

49

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Tensor product and unitarity

Published on 02 Dec 2023 - 14:37

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What is the unitary subset of Lie algebra $su(2)$?

Published on 02 Dec 2023 - 20:29

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Is this operator unitary?

Published on 03 Dec 2023 - 19:15

119

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Geodesic distance in the (complex) projective unitary group

Published on 05 Dec 2023 - 11:18

40

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On the set of complex square matrices $H$ such that $H + H^* = I$

Published on 05 Dec 2023 - 20:23

50

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Are irreducible representations of the (complex) projective unitary group irreducible representations of the unitary group?

Published on 11 Dec 2023 - 14:38

24

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$F_{s;I}=\frac1{2^{n-|I|}}\sum_{supp(t)\subset I^c}tr(\chi_tF_{s;I})\chi_t=\frac1{2^n}\sum_{supp(t)\subset I^c}tr(\chi_s\otimes\chi_tf)\chi_t$

Published on 16 Dec 2023 - 7:41

39

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Power series of unitary matrices that is also unitary

Published on 16 Dec 2023 - 13:30

29

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Size of an $\epsilon$-net on n-qubit unitaries

Published on 19 Dec 2023 - 12:59

22

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Maximum and minimum value of trace of unistochastic matrix

Published on 20 Dec 2023 - 4:11

36

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Condition on unitary operator for real eigenstates of Hamiltonian

Published on 22 Dec 2023 - 8:49

173

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Weights in SU(3)

Published on 26 Dec 2023 - 9:34

List Question

Unitary operators and a product of reflections

Unitary transformation to triangularize 2 matrices at the same time

Show that $U^* A U$ is upper triangular, with $A$ upper triangular, and $U$ unitary and lower-Hessenberg

Tensor product and unitarity

What is the unitary subset of Lie algebra $su(2)$?

Is this operator unitary?

Geodesic distance in the (complex) projective unitary group

On the set of complex square matrices $H$ such that $H + H^* = I$

Are irreducible representations of the (complex) projective unitary group irreducible representations of the unitary group?

$F_{s;I}=\frac1{2^{n-|I|}}\sum_{supp(t)\subset I^c}tr(\chi_tF_{s;I})\chi_t=\frac1{2^n}\sum_{supp(t)\subset I^c}tr(\chi_s\otimes\chi_tf)\chi_t$

Power series of unitary matrices that is also unitary

Size of an $\epsilon$-net on n-qubit unitaries

Maximum and minimum value of trace of unistochastic matrix

Condition on unitary operator for real eigenstates of Hamiltonian

Weights in SU(3)

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