[kbwt]

I am not a physicist, but the experiment does not seem convincing to me.

The Larmor clock doesn’t measure a proper time as in spacetime distance between two events. Instead it measures the rotation of a dipole in an electromagnetic field.

The experimenters apply a combination of an electrostatic field (the barrier) and a magnetic field (the timer driving Larmor precession). In the frame of reference of the spinning particle, this is exhibited as a sum of two electrostatic fields. The barrier is a locally uniform repulsive electrostatic field, while the the timer is a radially varying axial electrostatic field. The particle is a dipole, tilted from the timer axis by the precession angle. When the particle tunnels through the barrier, it also tunnels through the timer field, without precessing over the tunneled distance just as the particle is not exhibiting repulsion from the barrier over the same distance.

This is experimentally verifiable as the amount of missed precession has a lower bound proportional to the sine of the angle between the magnetic field and the barrier.

[i_cannot_hack]

I'm curious, what field are you in? For a non-physicist you seem quite knowledgeable and confident about physics and quantum phenomena

[kbwt]

I work on software for augmented reality and distributed systems. That background is not directly applicable to quantum physics, but I like to think that I am highly trained at spotting logical errors.

[theshadowknows]

Right?!?

[amai]

Tunneling doesn't mean jumping. The probability wave of the particle does exist inside the barrier, see e.g. https://commons.wikimedia.org/wiki/File:TunnelEffektKling1.p... So yes, it "tunnels" through the timer field also, but the probability of interacting with the timer field is not zero.

I would be interested if the Lamor clock also shows a shift in the reflected particles. Because that would mean, also the reflected particles spend some time inside the barrier.

[kbwt]

> So yes, it "tunnels" through the timer field also, but the probability of interacting with the timer field is not zero.

Of course, but it is less than one. Hence the measurement underestimates the proper time interval.

[amai]

"Inside the barrier, the atoms encounter, and barely interact with, a weak magnetic field. This weak interaction does not perturb the tunneling. But it causes each atom’s clock hand to move by an unpredictable amount, which can be measured once that atom exits the barrier. "

https://www.scientificamerican.com/article/quantum-tunneling...