List questions from quantum-mechanics

Published on 21 Dec 2018 - 13:02

295

Views

In the Physicists' definition of the path integral, does the result depend on the choice of partitions?

Published on 23 Feb 2026 - 3:01

177

Views

Is it possible to take square root of the operator $e^{a\frac{d}{dx}}$?

Published on 30 Dec 2018 - 12:32

77

Views

Substitution - mistake

Published on 26 Mar 2026 - 2:26

456

Views

Delta distribution and the Schrödinger equation

Published on 26 Mar 2026 - 4:30

1.2k

Views

Commutator of the Hamiltonian and Parity Operator - evaluation of derivatives

Published on 05 Jan 2019 - 19:20

177

Views

Is the set $\{\delta_x\}_{x \in [a, \ b]}$ a basis for the set of distributions on $C^{\infty}_c([a, \ b])$?

Published on 26 Mar 2026 - 11:00

37

Views

Evaluation of the commutator $[\frac{\partial}{\partial x_j},\frac{x_ix_j-r^2\delta_{ij}}{r^3}]=-2x_i/r^3$.

Published on 17 Jan 2019 - 20:41

591

Views

Integral representation of log of operators

Published on 26 Mar 2026 - 20:40

330

Views

Trace of a matrix exponential with tensor products, and Von Neumann entropy

Published on 25 Mar 2026 - 16:01

75

Views

Probabilistic solution of Hydrogen atom PDE?

Published on 23 Jan 2019 - 20:06

179

Views

Inequality relating the probabilities of a quantum state to the euclidean distance of states.

Published on 25 Mar 2026 - 6:22

123

Views

Need serious help with notation representing matrices as "scalars"

Published on 29 Jan 2019 - 5:19

79

Views

Von Neumann ergodic theorem for purely continuous spectrum

Published on 26 Mar 2026 - 10:58

79

Views

Time evolution of a finite dim. quantum system

Published on 31 Jan 2019 - 16:25

List Question

General relationship between Green's functions and propagators?

In the Physicists' definition of the path integral, does the result depend on the choice of partitions?

Is it possible to take square root of the operator $e^{a\frac{d}{dx}}$?

Substitution - mistake

Delta distribution and the Schrödinger equation

Commutator of the Hamiltonian and Parity Operator - evaluation of derivatives

Is the set $\{\delta_x\}_{x \in [a, \ b]}$ a basis for the set of distributions on $C^{\infty}_c([a, \ b])$?

Evaluation of the commutator $[\frac{\partial}{\partial x_j},\frac{x_ix_j-r^2\delta_{ij}}{r^3}]=-2x_i/r^3$.

Integral representation of log of operators

Trace of a matrix exponential with tensor products, and Von Neumann entropy

Probabilistic solution of Hydrogen atom PDE?

Inequality relating the probabilities of a quantum state to the euclidean distance of states.

Need serious help with notation representing matrices as "scalars"

Von Neumann ergodic theorem for purely continuous spectrum

Time evolution of a finite dim. quantum system

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