How Does a Magnetic Field Influence a 2D Harmonic Oscillator?

Click For Summary
SUMMARY

The discussion centers on the influence of a magnetic field on a two-dimensional harmonic oscillator (2D HO) using the Hamiltonian formulation. The Hamiltonian is expressed as H = 1/2m (p - e/c A)^2, where A is the vector potential defined as A = 1/2 * B x r. The goal is to express H in terms of the magnetic field B along the z-axis, revealing its resemblance to a 2D harmonic oscillator with an additional term. The relationship between the angular momentum L and the momentum p is also highlighted, with L defined as L = r x p.

PREREQUISITES
  • Understanding of Hamiltonian mechanics
  • Familiarity with vector potentials in electromagnetism
  • Knowledge of two-dimensional harmonic oscillators
  • Basic concepts of angular momentum in physics
NEXT STEPS
  • Study Hamiltonian mechanics in detail, focusing on the Hamiltonian for harmonic oscillators
  • Explore vector potentials and their applications in electromagnetic theory
  • Investigate the mathematical representation of angular momentum in two dimensions
  • Examine the effects of magnetic fields on charged particles in classical mechanics
USEFUL FOR

Physics students, researchers in classical mechanics, and anyone interested in the interplay between magnetic fields and harmonic oscillators.

iamnoy
Messages
1
Reaction score
0

Homework Statement


charge e is within 2 dimensions in presence of magnetic field.

H = 1/2m (p - e/c A)^2

A = 1/2* B x r

p and r have two components

Show: H in terms of B along z axis resembles 2D HO (with some extra term)

express H in terms of x, y, p_x, L_y

Homework Equations



L = r x p[/B]

Hamiltonian for HO
dbd8f853d8d1e754b5089385733a4f9a.png


The Attempt at a Solution



I plugged in B into H equation above so that gives:

H = 1/2m [p- e/c (1/2*Bxr)]

but i do not know what do do next. How do I express H in terms of B along z axis?
 
Physics news on Phys.org
Well, if you use the vector potential [itex]\vec A= B x \hat y[/itex], then you can find the complete calculation here. I'm not sure using other vector potentials, gives the same effect or not!
 

Similar threads

  • · Replies 1 ·
Replies
1
Views
1K
  • · Replies 5 ·
Replies
5
Views
2K
Replies
12
Views
3K
  • · Replies 3 ·
Replies
3
Views
7K
  • · Replies 1 ·
Replies
1
Views
3K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 8 ·
Replies
8
Views
2K