List questions from quantum-mechanics

Published on 25 Mar 2026 - 22:02

40

Views

How to approximate $\exp(-t(A-B))$ for diagonal $A$ and rank-1 $B$?

Published on 18 Mar 2023 - 1:47

174

Views

Measuring in Different Bases - Deterministic versus Random outcomes

Published on 25 Mar 2026 - 19:01

52

Views

How to shift the eigenvalues of a quantum Hermitian operator G to ±r?

Published on 26 Mar 2026 - 1:15

106

Views

Euler-Lagrange equations for hydrogen atoms

Published on 27 Mar 2026 - 12:26

467

Views

Normalize a wavefunction

Published on 29 Mar 2023 - 16:46

79

Views

Using $(e^{ik\cdot x})$ as an orthonormal basis for $L^2(\mathbb{R}^d;\mathbb{C})$ to define trace.

Published on 28 Mar 2026 - 6:48

60

Views

In what sense is $\breve{g}(x-y)/(2\pi)^n$ the integral kernel of $g(-i\nabla)$?

Published on 30 Mar 2026 - 2:07

107

Views

Commutator bertween shift operator and "position" operator

Published on 01 Apr 2023 - 16:41

106

Views

Universal central extensions as a solution to lifting projective representations of the Galilei group

Published on 02 Apr 2023 - 12:00

212

Views

Is there true randomness?

Published on 26 Mar 2026 - 17:51

357

Views

What is "class multiplication" in group theory?

Published on 04 Apr 2023 - 2:07

57

Views

If $T\geq 0$ then $|\langle x,STx\rangle|\leq\|S\|\langle x,Tx\rangle$

Published on 04 Apr 2023 - 21:02

62

Views

An inequality for Schatten norms with a compact self-adjoint operator

Published on 04 Apr 2023 - 22:04

167

Views

Symmetric subspace dimension of Hermitian matrix

Published on 26 Mar 2026 - 2:55

List Question

Intuition behind probability amplitudes, probabilities and Bloch sphere

How to approximate $\exp(-t(A-B))$ for diagonal $A$ and rank-1 $B$?

Measuring in Different Bases - Deterministic versus Random outcomes

How to shift the eigenvalues of a quantum Hermitian operator G to ±r?

Euler-Lagrange equations for hydrogen atoms

Normalize a wavefunction

Using $(e^{ik\cdot x})$ as an orthonormal basis for $L^2(\mathbb{R}^d;\mathbb{C})$ to define trace.

In what sense is $\breve{g}(x-y)/(2\pi)^n$ the integral kernel of $g(-i\nabla)$?

Commutator bertween shift operator and "position" operator

Universal central extensions as a solution to lifting projective representations of the Galilei group

Is there true randomness?

What is "class multiplication" in group theory?

If $T\geq 0$ then $|\langle x,STx\rangle|\leq\|S\|\langle x,Tx\rangle$

An inequality for Schatten norms with a compact self-adjoint operator

Symmetric subspace dimension of Hermitian matrix

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