Optical dipole trap for bec

[wdlang]

optical diple trap is used to trap spinor bec

i have a question

why are the three different atomic internal levels feel the same shift?

To calculate the energy shift of a specific internal level, we need to find out the coupling between this level to higher levels. For different levels, this couling differs up tp a clebsch-gordon coeffecient. So generally different levels will feel different energy shifts.

But in my impression, the three levels feel the same shift.

 

[wdlang]

oh, i find some papers

If the laser beam is linearly polarized, all the internal levels feel the same shift

but if the laser beam is circularly polarized, they feel different shift

see this paper below

"Spin-Polarized Atoms in a Circularly Polarized Optical Dipole Trap" PRL 83 1311

 

[charng]

There could be several possible explanations for why the three different internal levels in the optical dipole trap for BEC may appear to have the same energy shift. One possibility is that the energy shift is small enough that it is not noticeable for the specific levels being observed. Another possibility is that the experimental conditions or setup may be such that the energy shift is being averaged out across the different levels. Additionally, it could be that the specific conditions in the optical dipole trap are causing a uniform energy shift across all three levels. Further research and experimentation would be needed to fully understand and explain this phenomenon.