User J-J

7 votes

1 answer

2k views

General coordinate transformations?

asked Dec 8, 2018 at 12:23

3 votes

1 answer

726 views

Is a bound state a stationary state?

asked Mar 24, 2019 at 1:20

3 votes

1 answer

353 views

Is four velocity always given by $U^{\mu} = d x^{\mu}/d\tau$?

asked Jul 4, 2019 at 22:43

2 votes

2 answers

3k views

Solving the free particle problem in momentum space

asked Mar 24, 2019 at 0:40

2 votes

0 answers

239 views

Orthonormality: from finite ($\delta_{ij}$) to infinite ($\delta(x-y)$) dimensional vector spaces [duplicate]

asked Dec 26, 2018 at 18:09

1 vote

1 answer

392 views

Orthonormality and completeness in infinite dimensions: 2 different definitions [duplicate]

asked Dec 26, 2018 at 22:57

1 vote

1 answer

828 views

How does a propagator act on a wave function in $x$-space?

asked Mar 23, 2019 at 21:53

1 vote

1 answer

400 views

Quantum state where uncertainty in kinetic energy is zero?

asked May 21, 2019 at 16:19

1 vote

0 answers

67 views

Momentum in Gravitational Waves - Maggiore's explanation

asked Nov 1, 2019 at 17:23

0 votes

0 answers

46 views

Gravitational wave thought experiment: changing circumference?

asked Oct 23, 2019 at 15:35

0 votes

1 answer

70 views

Why aren't EM waves directionless?

asked Nov 14, 2015 at 21:13

Stack Exchange Network

11 Questions

General coordinate transformations?

Is a bound state a stationary state?

Is four velocity always given by $U^{\mu} = d x^{\mu}/d\tau$?

Solving the free particle problem in momentum space

Orthonormality: from finite ($\delta_{ij}$) to infinite ($\delta(x-y)$) dimensional vector spaces [duplicate]

Orthonormality and completeness in infinite dimensions: 2 different definitions [duplicate]

How does a propagator act on a wave function in $x$-space?

Quantum state where uncertainty in kinetic energy is zero?

Momentum in Gravitational Waves - Maggiore's explanation

Gravitational wave thought experiment: changing circumference?

Why aren't EM waves directionless?