Is anyone into quantum technologies and quantum metrology?

[iMo]

Quantum sensors and their inherent measurement principle are very interesting from a metrological perspective, since they are based on fundamental constants. In the case of the NV center, it is Planck’s constant h.

How can I derive the Planck's constant off that [NV QOOOL Kit] measurement?

[branadic]

You would have to run the experiment in reverse, that is, apply a known magnetic field, measure the Zeeman splitting Δf and from there calculate h by Δf=2*γ*B, with γ=g_e*μ_B/h, where g_e = 2.003 is the NV electronic Landé factor, μ_B the Bohr magneton and h is Planck’s constant.

Easier though to run an experiment like this to derive Planck's constant:


-branadic-

[iMo]

Afaik there are no particles, but quantized excitations of quantum fields only - and therefore everything in our Universe is based on Planck's constant.. 

[TimFox]

“Particles” and “waves” are mathematical models of reality that are useful for calculating and describing physical processes.  There are “electrons”, “protons”, etc. in reality: I have detected them in the usual experiments.

[iMo]

“Particles” and “waves” are mathematical models of reality that are useful for calculating and describing physical processes.  There are “electrons”, “protons”, etc. in reality: I have detected them in the usual experiments.

The "contemporary physics" (well, the physics is still young), ie. the Standard Model, talks opposite - the "particles" are not the "reality" but a derived concept. The "observation" of the quantum fields excitation by your "physical detector" identifies/registers it "as a particle", but the particles do not exist in that theory.
Interesting topic, indeed.. 

[bnz]

We have also worked on a solution to build a quantum magnetometer on a breadbord:
https://media.licdn.com/dms/image/v2/D4D22AQFsyydryQzGrQ/feedshare-shrink_800/B4DZqTDmZeJMAg-/0/1763403787541?e=1764806400&v=beta&t=eeeE5Ax1jWT7jCgfUWKwXR5QDUHtmj_IUvys92fLtpI

The link does not work anymore (Invalid e query string).

[BillyKalfus]

I'm a PhD student working with superconducting circuits for quantum computing

[mike011235]

Quantum sensors and their inherent measurement principle are very interesting from a metrological perspective, since they are based on fundamental constants. In the case of the NV center, it is Planck’s constant h.

How can I derive the Planck's constant off that [NV QOOOL Kit] measurement?

In the fiber-optics class I did in the 90s, one of the Labs was to measure Planck's constant using the difference in band gap voltage at two temperatures. It might be that we needed to use the same amount of current in each measurement. We measured the LED at room temperature and then with the LED in liquid nitrogen.

It was refreshing to have a physicist teaching 1 course in the electronics program.

[iMo]

fyi