List questions from quantum-mechanics

Published on 14 Apr 2026 - 8:14

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Bogoliubov Transform

Published on 29 Apr 2026 - 12:53

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Closed form/ meaning of sum of geometric series of operator exponentials

Published on 29 Apr 2026 - 12:25

94

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Number theory to estimate lower bound of spectrum in quantum mechanics?

Published on 13 Apr 2026 - 21:09

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Problem in quantum information theory

Published on 29 Apr 2026 - 12:49

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Prove that complex exponentials $(\phi_n(x)=\frac{1}{\sqrt{a}}e^{i\frac{2\pi nx}{a}})_{n=0, \pm 1, \pm2,...}$ are complete and orthonormal on $[0,a]$

Published on 16 Apr 2026 - 1:20

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Find a Unitary transformation from $(\phi_n(x)=\frac{1}{\sqrt{a}}e^{i\frac{2\pi nx}{a}})_{n=0, \pm 1,...}$ to trigonometric basis in $L^2([0,a])$

Published on 17 Apr 2026 - 5:32

93

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Reduced density operators of a pure Bipartite state?

Published on 29 Apr 2026 - 12:26

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Mistake in calculation $|c_l|^2\int_{0}^{2\pi}d\phi\int_{0}^{\pi}d\theta \sin(\theta)(\sin(\theta))^{2l}=1$

Published on 16 Apr 2026 - 9:35

31

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Convergence of delta function in $L^{\varepsilon + 1/2}$

Published on 13 Apr 2026 - 22:43

98

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Please prove the statement in description given in section 3 of Quantum Mechanics (Landau & Lifshitz).

Published on 08 Apr 2026 - 17:24

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$H_{SO}=f(r)\overrightarrow{S}\cdot\overrightarrow{L} \,\,\,$ $[H_{SO},L_z] \neq 0$

Published on 13 Apr 2026 - 20:26

479

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Rotation and Translation Operators

Published on 12 Apr 2026 - 7:10

313

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Schrödinger Equation- ODE

Published on 13 Apr 2026 - 0:02

58

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Which Area of Math Contributes to Quantum Theory

Published on 11 Apr 2026 - 4:11

List Question

Geometric Quantization and Wigner Functions

Bogoliubov Transform

Closed form/ meaning of sum of geometric series of operator exponentials

Number theory to estimate lower bound of spectrum in quantum mechanics?

Problem in quantum information theory

Prove that complex exponentials $(\phi_n(x)=\frac{1}{\sqrt{a}}e^{i\frac{2\pi nx}{a}})_{n=0, \pm 1, \pm2,...}$ are complete and orthonormal on $[0,a]$

Find a Unitary transformation from $(\phi_n(x)=\frac{1}{\sqrt{a}}e^{i\frac{2\pi nx}{a}})_{n=0, \pm 1,...}$ to trigonometric basis in $L^2([0,a])$

Reduced density operators of a pure Bipartite state?

Mistake in calculation $|c_l|^2\int_{0}^{2\pi}d\phi\int_{0}^{\pi}d\theta \sin(\theta)(\sin(\theta))^{2l}=1$

Convergence of delta function in $L^{\varepsilon + 1/2}$

Please prove the statement in description given in section 3 of Quantum Mechanics (Landau & Lifshitz).

$H_{SO}=f(r)\overrightarrow{S}\cdot\overrightarrow{L} \,\,\,$ $[H_{SO},L_z] \neq 0$

Rotation and Translation Operators

Schrödinger Equation- ODE

Which Area of Math Contributes to Quantum Theory

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