User LPZ

19 votes

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A better Schrödinger Equation with Relativistic Effects?

answered Jun 6 at 22:43

11 votes

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Periodic boundary conditions: torus or infinite images?

answered Feb 19 at 14:34

11 votes

Why are magnetic monopoles "incompatible" with quantum mechanics?

answered Apr 25, 2022 at 9:13

11 votes

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Can there be a repulsion between an electron beam and a proton beam depending on the beam's velocities?

answered Mar 6, 2023 at 20:20

11 votes

Time evolution operator in classical mechanics?

answered Jun 8, 2023 at 22:12

10 votes

Why is torque defined as $\vec{r} \times F$?

answered Apr 24, 2022 at 13:05

9 votes

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Existence of gap when the first energy level has an infinite degeneracy

answered Nov 4 at 13:22

8 votes

From what equations is magnetic field uniquely determined for a given current distribution?

answered Jul 16 at 14:13

8 votes

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Cauchy boundary conditions and Greens functions with Fourier transform

answered Nov 27, 2022 at 18:42

8 votes

Is there a generalization of the adiabatic theorem into a degenerate Hamiltonian?

answered May 26, 2023 at 23:56

7 votes

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Are the instantaneous eigenstates of a time-dependent hamiltonian continuous?

answered Jul 17, 2022 at 14:23

7 votes

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Does specific heat capacity depend on temperature of the substance?

answered May 3, 2022 at 8:13

7 votes

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The mass of magnetic monopoles

answered Nov 8 at 9:12

7 votes

Electromagnetism in 2+1 dimensions?

answered Apr 22 at 15:29

7 votes

Examples of systems with infinite dimensional Hilbert space, whose energy is bounded from above

answered Jun 13 at 9:40

7 votes

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Classical formulation of mechanics applied to Quantum Mechanics

answered Feb 6 at 19:13

6 votes

Is the electromagnetic 4-potential a Lorentz 4-vector in the Coulomb gauge?

answered Feb 8 at 16:23

6 votes

Generators of ${\rm SU}(n)$ are traceless. Why?

answered Oct 20, 2023 at 15:00

6 votes

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Form of the Hamiltonian at Half-filling

answered Apr 27 at 17:26

6 votes

Wrong representation of the field of an axially magnetized ring magnet floating on the internet?

answered May 5 at 0:09

6 votes

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Exponential decay of propagator outside lightcone

answered Mar 31 at 14:32

6 votes

Inverse Fourier transform of time evolved $e^{-a|x|}$

answered Oct 25 at 8:38

6 votes

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Fugacity in the classical limit

answered Jul 24, 2022 at 11:35

6 votes

Understanding a sum in the Bravais lattice

answered Jul 1, 2023 at 9:25

6 votes

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Calculating free energy from coherent state path integral

answered Dec 27, 2022 at 0:21

6 votes

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Initial conditions in an infinite string of masses

answered Jan 25, 2023 at 13:09

6 votes

Are closed streamlines necessary to have vortices?

answered Feb 27, 2023 at 18:20

5 votes

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Intuition on $E^2-B^2$ as a Lagrangian?

answered Dec 28, 2022 at 16:44

5 votes

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What unitary operator achieves Bogoliubov transformation?

answered Mar 10, 2023 at 23:44

5 votes

Interpretation of this Hamiltonian

answered Jun 13, 2023 at 14:22

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592 Answers

A better Schrödinger Equation with Relativistic Effects?

Periodic boundary conditions: torus or infinite images?

Why are magnetic monopoles "incompatible" with quantum mechanics?

Can there be a repulsion between an electron beam and a proton beam depending on the beam's velocities?

Time evolution operator in classical mechanics?

Why is torque defined as $\vec{r} \times F$?

Existence of gap when the first energy level has an infinite degeneracy

From what equations is magnetic field uniquely determined for a given current distribution?

Cauchy boundary conditions and Greens functions with Fourier transform

Is there a generalization of the adiabatic theorem into a degenerate Hamiltonian?

Are the instantaneous eigenstates of a time-dependent hamiltonian continuous?

Does specific heat capacity depend on temperature of the substance?

The mass of magnetic monopoles

Electromagnetism in 2+1 dimensions?

Examples of systems with infinite dimensional Hilbert space, whose energy is bounded from above

Classical formulation of mechanics applied to Quantum Mechanics

Is the electromagnetic 4-potential a Lorentz 4-vector in the Coulomb gauge?

Generators of ${\rm SU}(n)$ are traceless. Why?

Form of the Hamiltonian at Half-filling

Wrong representation of the field of an axially magnetized ring magnet floating on the internet?

Exponential decay of propagator outside lightcone

Inverse Fourier transform of time evolved $e^{-a|x|}$

Fugacity in the classical limit

Understanding a sum in the Bravais lattice

Calculating free energy from coherent state path integral

Initial conditions in an infinite string of masses

Are closed streamlines necessary to have vortices?

Intuition on $E^2-B^2$ as a Lagrangian?

What unitary operator achieves Bogoliubov transformation?

Interpretation of this Hamiltonian