Recent content by BillKet

I can do shielding if that is possible, but I am just not sure how. For example, if I use 2 parallel plates, I might have some induced currents in the surface of the plates, that would generate a magnetic field at the center if the plates are not perfectly parallel. I am not sure how I would...

But I thought that the high RF electric field and the relatively high RF magnetic field in the x-y plane (assuming I won't align the SQUID perfectly parallel to that on the first attempt) would damage the SQUID.

I was hoping for a more detailed reply... I know some stuff in general terms, but I am not sure how I would proceed in practice. For example "If you can measure the errors" - as I said in the original post, I don't know what is the best way to measure tiny RF magnetic fields in practice.

Hello! I would like to apply an electric field of 100 V/cm, along the z-axis (defined by an externally applied DC field), with a frequency of 100 MHz at the location of an atomic cloud (everything is inside ultra high vacuum). We can assume that the atoms are located in a volume with a diameter...

Hello! I have the following situation: I have a 3 level system, with 2 ground states, call them ##g_1## and ##g_2## and an excited state, ##e##, with energies ##E_{g1}<E_{g2}## and ##E_e##. I have a driving field with frequency ##\omega## such that ##\Gamma \ll \Delta \ll E_{g2}-E_{g1} \ll E_e -...

Hello! I am confused about ##\Lambda##-enhanced gray molasses cooling. I understand that it combines gray molasses cooling with velocity-selective coherent population trapping (VSCPT). But I can't seem to understand what is the difference between these 3 methods. As far as I can tell, the main...

Hello! I want to make sure I got this right. Say we have a 3 level system ordered such that ##E_1<E_2<<E_3## with ##\omega_0 = E_2-E_1##. I use a laser to measure ##\omega_0## (e.g. I scan the laser frequency across the expected location of the resonance and fit that with a Voigt profile, we can...

I am sorry I am still confused. For example in this paper: https://arxiv.org/pdf/2210.16910.pdf, they do something similar to what I am describing (but it is a different spin-spin coupling compared to my question). However they have the same operator as me, between the same states, and the final...

I am not sure I understand this. The nuclear spin-dependent parity violation Hamiltonian (operator) is ##W_P\hat{n}\cdot(I\times S)##. This has the same form as the EDM interaction, just that the vector ##S## is replaced by ##I \times S##. Basically in the most general case, the operator is of...

Thank you for your reply! I might miss understand what you are saying. I agree that in one single measurement one can't distinguish between eEDM and nuclear EDM. However in normal EDM experiments (such as ACME), they are not sensitive to P-odd, T-even effects. Basically the polarizing field...

Hello! This is quite technical, but any advice would be greatly appreciated (@Twigg ?). It is about this paper: https://arxiv.org/pdf/1909.02650.pdf. In principle, beside the EDM, we also have spin dependent parity violating (time-reversal conserving) effects. This is always true, as we need a...

Thanks a lot for this! Before I look more into it, can this method be used with frequency doubling/tripling? My transitions is around 250 nm.

Hello! I have a situation in which I need (try) to scan a laser frequency over a given range in search of a resonance in an atom. In our case the linewidths are very large 10-100 GHz (and for some reasons we can't cool the atoms down, so we are kinda stuck with these linewidths for now). Also...

Hello! I am not sure if this is the best place for this question, but I want to make a simple illustrative drawing (for a presentation given to people both with and without physics knowledge) of a nuclear magnetic octupole moment. For example for a magnetic dipole I can use a magnet as a...

Maybe @Twigg can help?