Tagged Questions
1
vote
0answers
30 views
Why is low temperature required for optical lattice systems to enter magnetic regime?
"Optical lattice requires a very low temperature scale to enter magnetism regime."
Why is that?
What I know:
optical lattice systems suppress kinetic energy (hopping parameter: $t$ small);
...
3
votes
2answers
67 views
limits on a gauss box of light
Consider a wall defined by $w(x,y,z) = \Theta(x-L)$ which is nonzero in the infinite semi-space of $x \ge L$, as well as a coherent planar standing EM wave travelling in the $z$ plane given by its ...
2
votes
2answers
253 views
Why does optical pumping of Rubidium require presence of magnetic field?
The optical pumping experiment of Rubidium requires the presence of magnetic field, but I don't understand why.
The basic principle of pumping is that the selection rule forbids transition from ...
9
votes
4answers
550 views
Nonlinear optics as gauge theory
the widely used approach to nonlinear optics is a Taylor expansion of the dielectric displacement field $\mathbf{D} = \epsilon_0\cdot\mathbf{E} + \mathbf{P}$ in a Fourier representation of the ...
3
votes
2answers
449 views
Alkali atom - photon interaction in zero magnetic field
An alkali atom has a single outer electron that interacts with incoming photons of the right wavelength (for alkalies it's in the visible & IR range). If there is an external magnetic field, the ...
