Recent content by aa2ll2

Thanks for your attention to this matter.

Hi Perok, Looking at some papers, the question of what hamiltonian to use seems a bit of a red herring. The starting point is the density matrix, where off diagonal terms decay as exp[-t/T_coh] In the model used for predicting the Bell violation in noise. My question should then be quite...

It is actually something that came up with loophole free Bell tests, but quite similar to computing.

The standard, coupling to bath, model. A bit of context may help. The single qubit coherence time is T_coh. I'm anticipating the time dependence should involve T_coh, something like C(t,0) = e^[-t/T_coh]. Or, are you saying coherence time is not pertinent?

It's a noise question. So, the free particle spin evolving in noise, does not remain forever the same, with prob. 1, right? I actually have in mind an NV centre, which I think is free for the purpose to hand.

Hi all, I have no idea how to introduce myself, so I'll keep this short. Microwave Engineer adrift on the high seas of qm. Cheers... aa2ll2

Consider repeated spin measurements, along the same axis, on the same electron, at t=0 and at t=t. For small t, the results are identical, so the correlation function, C(t,0)=1, but for large t, C(t,0) -> 0. Define C(t,0) = P(same) - P(different) = N(same) - N(different) / N(same) +...