User 71GA

18

votes

3

answers

3k

views

Meaning of inner product $\langle \vec{r} | \psi(t)\rangle $

Jun 16 '13 at 21:11 Community♦ 1

5

8

votes

2

answers

2k

views

Connection between $\Delta x \Delta p \geq \frac{\hbar}{2}$ and $\Delta E \Delta t \geq \frac{\hbar}{2}$

quantum-mechanics quantum-field-theory energy time heisenberg-uncertainty-principle

Jul 27 '13 at 18:05 Community♦ 1

9

7

votes

5

answers

10k

views

Relativistic momentum

special-relativity mass momentum

Jul 12 '15 at 0:05 Odysseus Ithaca 147

2

6

votes

1

answer

6k

views

Connecting 4-velocity to equation for adding velocities

special-relativity velocity

Sep 16 '17 at 3:51 Muphrid 6,359

1

6

votes

2

answers

3k

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Proof for commutator relation $[\hat{H},\hat{a}] = - \hbar \omega \hat{a}$

quantum-mechanics homework-and-exercises operators harmonic-oscillator commutator

May 4 '13 at 11:37 Eugene B 404

2

6

votes

2

answers

2k

views

Amplitude of Probability amplitude. Which one is it?

quantum-mechanics terminology wavefunction probability complex-numbers

Feb 18 '13 at 21:35 JKL 3,464

6

votes

3

answers

1k

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Probability and probability amplitude

quantum-mechanics probability

Jan 24 '13 at 21:32 ThomasS 66

3

6

votes

1

answer

4k

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Minkowski diagram, hyperbola and invariant quantity of relativity

special-relativity

Nov 5 '12 at 21:07 71GA 2,240

2

5

votes

4

answers

5k

views

Minkowski diagram and length contraction

special-relativity metric-tensor coordinate-systems inertial-frames

Nov 14 at 20:36 Qmechanic♦ 130k

4

5

votes

2

answers

14k

views

Deriving group velocity

quantum-mechanics waves superposition phase-velocity

Aug 5 '19 at 8:17 Qmechanic♦ 130k

2

5

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2

answers

2k

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Kinetic energy of a photon and Schwarzschild radius

black-holes photons

Mar 27 '14 at 1:04 Community♦ 1

2

4

votes

3

answers

24k

views

How to get “complex exponential” form of wave equation out of “sinusoidal form”?

homework-and-exercises waves complex-numbers linear-systems

Feb 1 '17 at 9:45 BLAZE 2,019

3

4

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2

answers

6k

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Pair production - mathematically?

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Nov 1 '15 at 1:02 Qmechanic♦ 130k

1

4

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3

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8k

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Finite potential well problem - calculating the ground state

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Jun 12 '14 at 10:07 Gigi Butbaia 1,056

4

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2

answers

2k

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Wavefunction as a combination of two stationary states - how to find those states?

quantum-mechanics homework-and-exercises wavefunction schroedinger-equation potential

Aug 8 '13 at 13:34 Qmechanic♦ 130k

4

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1

answer

351

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Observables - what are they?

quantum-mechanics operators observables

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2

4

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2

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696

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QM formalism is one big confusion - lack of geometrical explaination with images

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May 1 '13 at 19:06 Community♦ 1

1

4

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2

answers

3k

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Plotting $\psi$ for finite square well potential

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Apr 6 '13 at 11:00 Qmechanic♦ 130k

1

4

votes

2

answers

1k

views

Heisenberg uncertainty principle derivation - unexplained factor of $4 \sigma_k^2$ in Gaussian

quantum-mechanics heisenberg-uncertainty-principle

Feb 28 '13 at 21:04 Mark Eichenlaub 48.2k

3

votes

1

answer

5k

views

Schrödinger equation for a harmonic oscillator

quantum-mechanics homework-and-exercises schroedinger-equation harmonic-oscillator

Jun 16 at 21:32 DanielSank 20.7k

3

votes

1

answer

234

views

Tunneling and transmission

quantum-mechanics homework-and-exercises schroedinger-equation scattering quantum-tunneling

Nov 22 '17 at 15:35 Qmechanic♦ 130k

2

3

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2

answers

9k

views

Calculating the expectation value for kinetic energy $\langle E_k \rangle$ for a known wave function

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3

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1

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2k

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Finite, square, potential well

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Energies and numbers of bound states in finite potential well

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Quantum harmonic oscillator - book that does it all right [duplicate]

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May 7 '19 at 20:15 Qmechanic♦ 130k

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How do we know that $\psi$ is the eigenfunction of an operator $\hat{H}$ with eigenvalue $W$?

quantum-mechanics operators hamiltonian eigenvalue

Apr 30 '18 at 20:44 Community♦ 1

1

2

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2

answers

400

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Trying to read phase shift constant from the graphs

waves

Jan 17 '17 at 13:35 Kamil Maciorowski 614

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2

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1

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5k

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Gaussian wave packet

quantum-mechanics homework-and-exercises wavefunction heisenberg-uncertainty-principle fourier-transform

Sep 26 '13 at 6:39 Community♦ 1

2

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1

answer

310

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Term symbol - how do we know the number of electrons $e^-$?

angular-momentum quantum-spin atoms notation

Sep 8 '13 at 21:42 71GA 2,240

2

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1

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7k

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Total angular momentum - single electron

quantum-mechanics angular-momentum atoms representation-theory eigenvalue

Sep 8 '13 at 14:12 Qmechanic♦ 130k

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102 Questions

Meaning of inner product $\langle \vec{r} | \psi(t)\rangle $

Connection between $\Delta x \Delta p \geq \frac{\hbar}{2}$ and $\Delta E \Delta t \geq \frac{\hbar}{2}$

Relativistic momentum

Connecting 4-velocity to equation for adding velocities

Proof for commutator relation $[\hat{H},\hat{a}] = - \hbar \omega \hat{a}$

Amplitude of Probability amplitude. Which one is it?

Probability and probability amplitude

Minkowski diagram, hyperbola and invariant quantity of relativity

Minkowski diagram and length contraction

Deriving group velocity

Kinetic energy of a photon and Schwarzschild radius

How to get “complex exponential” form of wave equation out of “sinusoidal form”?

Pair production - mathematically?

Finite potential well problem - calculating the ground state

Wavefunction as a combination of two stationary states - how to find those states?

Observables - what are they?

QM formalism is one big confusion - lack of geometrical explaination with images

Plotting $\psi$ for finite square well potential

Heisenberg uncertainty principle derivation - unexplained factor of $4 \sigma_k^2$ in Gaussian

Schrödinger equation for a harmonic oscillator

Tunneling and transmission

Calculating the expectation value for kinetic energy $\langle E_k \rangle$ for a known wave function

Finite, square, potential well

Energies and numbers of bound states in finite potential well

Quantum harmonic oscillator - book that does it all right [duplicate]

How do we know that $\psi$ is the eigenfunction of an operator $\hat{H}$ with eigenvalue $W$?

Trying to read phase shift constant from the graphs

Gaussian wave packet

Term symbol - how do we know the number of electrons $e^-$?

Total angular momentum - single electron